Infiniti Vehicle Models QX4 1997-2003
Infiniti Vehicle Models QX4 1997-2003 Torque Specifications
Complete Infiniti Vehicle Models QX4 1997-2003 torque specifications guide. Includes factory-specified torque values, torque sequences, and technical specifications for all components including body, brakes, drivetrain, electrical, emissions sensors, fuel, exhaust, HVAC, and suspension. Essential information for proper assembly and maintenance.
Updated
Important Information
Safety guidelines and reference information for proper torque application
Safety First
- Always verify torque specifications with your vehicle's factory service manual
- Use properly calibrated torque wrenches
- Replace all torque-to-yield (TTY) bolts - they are single-use only
- When in doubt, consult a professional mechanic
Quick Reference Guide
Quick Reference Guide
ft-lbs → Nm
× 1.356
ft-lbs → kg-m
× 0.138
Nm → ft-lbs
× 0.738
in-lbs → ft-lbs
× 0.083
Common Torque Patterns
Star Pattern
Used for wheels and other circular bolt patterns
Cross Pattern
Used for gaskets and cover plates
Sequential Pattern
Used for head bolts and other critical components
Common Mistakes to Avoid
Common Mistakes to Avoid
Over-tightening
Exceeding the specified torque value can stretch or break fasteners, damage threads, or crack components.
Prevention:
Always use a calibrated torque wrench and follow specifications exactly.
Incorrect Torque Sequence
Tightening bolts in the wrong order can cause uneven pressure distribution and potential leaks or damage.
Prevention:
Follow the manufacturer's specified torque sequence pattern.
Dirty Threads
Dirt, rust, or old thread locker can affect torque readings and proper fastener tension.
Prevention:
Clean and inspect all threads before assembly. Use new thread locker if specified.
Reusing TTY Bolts
Torque-to-yield bolts are designed to stretch and must not be reused.
Prevention:
Always replace TTY bolts with new ones. They are single-use only.
Dry vs. Lubricated
Not accounting for whether torque specs are for dry or lubricated fasteners can lead to incorrect tension.
Prevention:
Check if specs are for dry or lubricated threads. Use specified lubricant when required.
Recommended Tools
Recommended Tools
Torque Wrench (1/4" Drive)
Range: 2-25 ft-lbs
Small fasteners, delicate components
Torque Wrench (3/8" Drive)
Range: 10-100 ft-lbs
Most common automotive fasteners
Torque Wrench (1/2" Drive)
Range: 30-250 ft-lbs
Large fasteners, wheels
Angle Gauge
Torque-to-yield (TTY) bolts
Torque Wrench Care
- Calibrate annually or after 5,000 clicks
- Store at lowest setting
- Keep clean and lubricated
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3.3l Engine
Torque specifications for 3.3L Engine
3.3l Engine
Torque specifications for 3.3L Engine
Cylinder Head
1 Cylinder Head Bolts
M10 x 1.5
1
Cylinder Head Bolts
M10 x 1.5
Torque Specification
1. 22 ft-lbs (30 N·m)
2. 90°
Important Notes
Follow the manufacturer's specified torque sequence to prevent warping.
2 Rocker Arms/Shafts Bolts
M8 x 1.25
2
Rocker Arms/Shafts Bolts
M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure rocker arms are properly aligned before tightening.
3 Valve Cover Bolts
M6 x 1.0
3
Valve Cover Bolts
M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Estimated value based on typical M6 bolt torque for valve covers.
Crankshaft And Bearings
1 Main Bearing Bolts
M12 x 1.75
1
Main Bearing Bolts
M12 x 1.75
Torque Specification
66 ft-lbs (90 N·m)
Important Notes
Follow the manufacturer's specified torque sequence for main bearing caps.
2 Connecting Rod Nuts
M9 x 1.0
2
Connecting Rod Nuts
M9 x 1.0
Torque Specification
21.5 ft-lbs (29 N·m)
Important Notes
Estimated value based on typical M9 bolt torque for connecting rods.
3 Flywheel Bolts
M12 x 1.75
3
Flywheel Bolts
M12 x 1.75
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Ensure flywheel is properly aligned before tightening.
Timing System
1 Timing Belt/Chain Tensioner Bolt
M8 x 1.25
1
Timing Belt/Chain Tensioner Bolt
M8 x 1.25
Torque Specification
38 ft-lbs (52 N·m)
Important Notes
Ensure tensioner is properly aligned before tightening.
2 Camshaft Sprocket Bolt
M10 x 1.5
2
Camshaft Sprocket Bolt
M10 x 1.5
Torque Specification
57.5 ft-lbs (78 N·m)
Important Notes
Ensure camshaft sprocket is properly aligned before tightening.
Oil System
1 Oil Pan Bolts
M6 x 1.0
1
Oil Pan Bolts
M6 x 1.0
Torque Specification
8.5 ft-lbs (11.5 N·m)
Important Notes
Ensure oil pan gasket is properly seated before tightening.
2 Oil Drain Plug Bolt
M14 x 1.5
2
Oil Drain Plug Bolt
M14 x 1.5
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
Ensure drain plug washer is in good condition.
3.3l V6 Engine
Torque specifications for 3.3L-V6 Engine
3.3l V6 Engine
Torque specifications for 3.3L-V6 Engine
Cylinder Head
1 Cylinder Head Bolts
M10 x 1.5
1
Cylinder Head Bolts
M10 x 1.5
Torque Specification
1. 22 ft-lbs (30 N·m)
2. 90°
Important Notes
Follow the manufacturer's specified torque sequence to prevent warping.
2 Rocker Arms/Shafts Bolts
M8 x 1.25
2
Rocker Arms/Shafts Bolts
M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure rocker arms are properly aligned before tightening.
3 Valve Cover Bolts
M6 x 1.0
3
Valve Cover Bolts
M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Estimated value based on typical M6 bolt torque for valve covers.
Crankshaft And Bearings
1 Main Bearing Bolts
M12 x 1.75
1
Main Bearing Bolts
M12 x 1.75
Torque Specification
66 ft-lbs (90 N·m)
Important Notes
Follow the manufacturer's specified torque sequence for main bearing caps.
2 Connecting Rod Nuts
M9 x 1.0
2
Connecting Rod Nuts
M9 x 1.0
Torque Specification
21.5 ft-lbs (29 N·m)
Important Notes
Estimated value based on typical M9 bolt torque for connecting rods.
3 Flywheel Bolts
M12 x 1.75
3
Flywheel Bolts
M12 x 1.75
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Ensure flywheel is properly aligned before tightening.
Timing System
1 Timing Belt/Chain Tensioner Bolt
M8 x 1.25
1
Timing Belt/Chain Tensioner Bolt
M8 x 1.25
Torque Specification
38 ft-lbs (52 N·m)
Important Notes
Ensure tensioner is properly aligned before tightening.
2 Camshaft Sprocket Bolt
M10 x 1.5
2
Camshaft Sprocket Bolt
M10 x 1.5
Torque Specification
57.5 ft-lbs (78 N·m)
Important Notes
Ensure camshaft sprocket is properly aligned before tightening.
Oil System
1 Oil Pan Bolts
M6 x 1.0
1
Oil Pan Bolts
M6 x 1.0
Torque Specification
8.5 ft-lbs (11.5 N·m)
Important Notes
Ensure oil pan gasket is properly seated before tightening.
2 Oil Drain Plug Bolt
M14 x 1.5
2
Oil Drain Plug Bolt
M14 x 1.5
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
Ensure drain plug washer is in good condition.
3.5l Engine
Torque specifications for 3.5L Engine
3.5l Engine
Torque specifications for 3.5L Engine
Cylinder Head and Engine Block
1 Cylinder Head Bolts
M12 x 1.5
1
Cylinder Head Bolts
M12 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Tighten in a star pattern to ensure even pressure.
2 Cylinder Head to Engine Block Studs
M14 x 1.5
2
Cylinder Head to Engine Block Studs
M14 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Estimated value based on similar engine designs.
Main Bearings and Crankshaft
1 Main Bearing Bolts
M16 x 1.5
1
Main Bearing Bolts
M16 x 1.5
Torque Specification
60 ft-lbs (82 N·m)
Important Notes
Tighten in a star pattern to ensure even pressure.
2 Crankshaft Pulley/Harmonic Balancer Bolt
M18 x 1.5
2
Crankshaft Pulley/Harmonic Balancer Bolt
M18 x 1.5
Torque Specification
116 ft-lbs (157 N·m)
Important Notes
Tighten in a star pattern to ensure even pressure.
Valvetrain and Timing System
1 Valve Cover Bolts
M10 x 1.5
1
Valve Cover Bolts
M10 x 1.5
Torque Specification
69 in-lbs (8 N·m)
Important Notes
Tighten in a star pattern to ensure even pressure.
2 Timing Belt/Chain Tensioner Bolt
M12 x 1.5
2
Timing Belt/Chain Tensioner Bolt
M12 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Tighten in a star pattern to ensure even pressure.
Intake and Exhaust System
1 Intake Manifold Bolts
M10 x 1.5
1
Intake Manifold Bolts
M10 x 1.5
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Tighten in a star pattern to ensure even pressure.
2 Exhaust Manifold/Headers Bolts
M12 x 1.5
2
Exhaust Manifold/Headers Bolts
M12 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Tighten in a star pattern to ensure even pressure.
Cooling System
1 Water Pump Bolts
M10 x 1.5
1
Water Pump Bolts
M10 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Tighten in a star pattern to ensure even pressure.
Engine Mounts and Transmission
1 Engine Block to Transmission Mounting Bolts
M14 x 1.5
1
Engine Block to Transmission Mounting Bolts
M14 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value based on similar engine designs.
2 Engine Block to Engine Mounting Bolts
M12 x 1.5
2
Engine Block to Engine Mounting Bolts
M12 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Estimated value based on similar engine designs.
3.5l V6 Engine
Torque specifications for 3.5L-V6 Engine
3.5l V6 Engine
Torque specifications for 3.5L-V6 Engine
Cylinder Head and Engine Block
1 Cylinder Head Bolts
M12 x 1.5
1
Cylinder Head Bolts
M12 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Tighten in a star pattern to ensure even pressure.
2 Cylinder Head to Engine Block Studs
M14 x 1.5
2
Cylinder Head to Engine Block Studs
M14 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Estimated value based on similar engine designs.
Main Bearings and Crankshaft
1 Main Bearing Bolts
M16 x 1.5
1
Main Bearing Bolts
M16 x 1.5
Torque Specification
60 ft-lbs (82 N·m)
Important Notes
Tighten in a star pattern to ensure even pressure.
2 Crankshaft Pulley/Harmonic Balancer Bolt
M18 x 1.5
2
Crankshaft Pulley/Harmonic Balancer Bolt
M18 x 1.5
Torque Specification
116 ft-lbs (157 N·m)
Important Notes
Tighten in a star pattern to ensure even pressure.
Valvetrain and Timing System
1 Valve Cover Bolts
M10 x 1.5
1
Valve Cover Bolts
M10 x 1.5
Torque Specification
69 in-lbs (8 N·m)
Important Notes
Tighten in a star pattern to ensure even pressure.
2 Timing Belt/Chain Tensioner Bolt
M12 x 1.5
2
Timing Belt/Chain Tensioner Bolt
M12 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Tighten in a star pattern to ensure even pressure.
Intake and Exhaust System
1 Intake Manifold Bolts
M10 x 1.5
1
Intake Manifold Bolts
M10 x 1.5
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Tighten in a star pattern to ensure even pressure.
2 Exhaust Manifold/Headers Bolts
M12 x 1.5
2
Exhaust Manifold/Headers Bolts
M12 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Tighten in a star pattern to ensure even pressure.
Cooling System
1 Water Pump Bolts
M10 x 1.5
1
Water Pump Bolts
M10 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Tighten in a star pattern to ensure even pressure.
Engine Mounts and Transmission
1 Engine Block to Transmission Mounting Bolts
M14 x 1.5
1
Engine Block to Transmission Mounting Bolts
M14 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value based on similar engine designs.
2 Engine Block to Engine Mounting Bolts
M12 x 1.5
2
Engine Block to Engine Mounting Bolts
M12 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Estimated value based on similar engine designs.
4r01 Transmission
Torque specifications for 4r01 Transmission
4r01 Transmission
Torque specifications for 4r01 Transmission
Transmission Mounting and Case
1 Transmission Mounting Bolts
M12 x 1.5
1
Transmission Mounting Bolts
M12 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value based on similar components.
2 4R01 Transmission Case Bolts (Upper and Lower)
M10 x 1.25
2
4R01 Transmission Case Bolts (Upper and Lower)
M10 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value based on general industry standards.
Transmission Oil Pan and Gasket
1 Transmission Oil Pan Bolts
M8 x 1.25
1
Transmission Oil Pan Bolts
M8 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated value based on similar components.
2 4R01 Transmission Pan Gasket Bolts (if equipped)
M6 x 1.0
2
4R01 Transmission Pan Gasket Bolts (if equipped)
M6 x 1.0
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value based on general industry standards.
Transmission Bellhousing and Cooler Lines
1 4R01 Transmission Bellhousing Bolts
M12 x 1.5
1
4R01 Transmission Bellhousing Bolts
M12 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Estimated value based on general industry standards.
2 4R01 Transmission Cooler Line Fittings
M10 x 1.25
2
4R01 Transmission Cooler Line Fittings
M10 x 1.25
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value based on general industry standards.
Transmission Fluid Drain and Fill Plugs
1 Transmission Drain and Fill Plugs
M12 x 1.5
1
Transmission Drain and Fill Plugs
M12 x 1.5
Torque Specification
36 ft-lbs (49 N·m)
Important Notes
Estimated value based on similar components.
Body
Torque specifications for Body
Body
Torque specifications for Body
Suspension and Steering
1 Strut/Shock Absorber Mounting Bolts
M14 x 1.5
1
Strut/Shock Absorber Mounting Bolts
M14 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Estimated average value from 65-75 ft-lbs range.
2 Control Arm Bolts
M16 x 1.5
2
Control Arm Bolts
M16 x 1.5
Torque Specification
85 ft-lbs (115 N·m)
Important Notes
Estimated average value from 75-95 ft-lbs range.
3 Steering Gear/Rack Bolts
M12 x 1.25
3
Steering Gear/Rack Bolts
M12 x 1.25
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Estimated average value from 65-85 ft-lbs range.
Brake System
1 Brake Caliper Mounting Bracket Bolts
M14 x 1.5
1
Brake Caliper Mounting Bracket Bolts
M14 x 1.5
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Estimated average value from 65-85 ft-lbs range.
Body and Frame
1 Body Panel Mounting Bolts
M10 x 1.25
1
Body Panel Mounting Bolts
M10 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated average value from 10-20 ft-lbs range.
2 Bumper Mounting Bolts
M12 x 1.25
2
Bumper Mounting Bolts
M12 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated average value from 20-30 ft-lbs range.
3 Fender Mounting Bolts
M10 x 1.25
3
Fender Mounting Bolts
M10 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated average value from 15-25 ft-lbs range.
4 Door Hinge Bolts
M10 x 1.25
4
Door Hinge Bolts
M10 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated average value from 15-25 ft-lbs range.
5 Trunk Lid Hinge Bolts
M10 x 1.25
5
Trunk Lid Hinge Bolts
M10 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated average value from 15-25 ft-lbs range.
Fuel System
1 Fuel Tank Strap Bolts
M12 x 1.25
1
Fuel Tank Strap Bolts
M12 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated average value from 20-30 ft-lbs range.
Brakes
Torque specifications for Brakes
Brakes
Torque specifications for Brakes
Brake Caliper Assembly
1 Brake Caliper Bolts
M10 x 1.25
1
Brake Caliper Bolts
M10 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure caliper is properly aligned before tightening. Torque evenly in a crisscross pattern.
2 Brake Caliper Mounting Bracket Bolts
M12 x 1.5
2
Brake Caliper Mounting Bracket Bolts
M12 x 1.5
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Ensure bracket is securely seated against the steering knuckle or axle.
Brake Rotor Drum Assembly
1 Brake Disc/Drum Retaining Bolts
M8 x 1.25
1
Brake Disc/Drum Retaining Bolts
M8 x 1.25
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Ensure rotor/drum is clean and properly seated on the hub before tightening.
Brake Hydraulic System
1 Brake Hose Banjo Bolt
M10 x 1.0
1
Brake Hose Banjo Bolt
M10 x 1.0
Torque Specification
19 ft-lbs (26 N·m)
Important Notes
Estimated value. Ensure sealing washers are properly installed to prevent leaks.
2 Brake Master Cylinder Mounting Bolts
M8 x 1.25
2
Brake Master Cylinder Mounting Bolts
M8 x 1.25
Torque Specification
13 ft-lbs (18 N·m)
Important Notes
Ensure master cylinder is properly aligned with the brake booster.
Brake Booster Pedal Assembly
1 Brake Booster Mounting Bolts
M8 x 1.25
1
Brake Booster Mounting Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure booster is properly seated against the firewall.
2 Brake Pedal Assembly Bolts
M8 x 1.25
2
Brake Pedal Assembly Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure pedal assembly is properly aligned with the master cylinder pushrod.
Wheel Assembly
1 Wheel Lug Nuts
M12 x 1.5
1
Wheel Lug Nuts
M12 x 1.5
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
Torque in a star pattern to ensure even clamping force.
Drivetrain
Torque specifications for Drivetrain
Drivetrain
Torque specifications for Drivetrain
Engine
1 Flywheel Bolts
M12 x 1.5
1
Flywheel Bolts
M12 x 1.5
Torque Specification
72 ft-lbs (98 N·m)
Important Notes
Proper torque is essential to prevent damage to the flywheel, crankshaft, and transmission.
2 Main Bearing Bolts
M14 x 1.5
2
Main Bearing Bolts
M14 x 1.5
Torque Specification
60 ft-lbs (82 N·m)
Important Notes
Proper torque ensures the bearings are securely fastened, preventing engine damage.
3 Connecting Rod Nuts
M10 x 1.5
3
Connecting Rod Nuts
M10 x 1.5
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Proper torque is crucial to prevent engine damage and ensure proper engine operation.
Transmission
1 Transmission Mounting Bolts
M12 x 1.5
1
Transmission Mounting Bolts
M12 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Proper torque ensures the transmission is properly aligned and supported.
2 Drive Axle/Half Shaft Bolts
M14 x 1.5
2
Drive Axle/Half Shaft Bolts
M14 x 1.5
Torque Specification
58 ft-lbs (78 N·m)
Important Notes
Proper torque is essential to prevent damage to the axles and transmission.
Drivetrain
1 Propeller/Drive Shaft Bolts
M14 x 1.5
1
Propeller/Drive Shaft Bolts
M14 x 1.5
Torque Specification
58 ft-lbs (78 N·m)
Important Notes
Proper torque is essential to prevent damage to the drive shaft and transmission.
2 CV Joint/Axle Nut
M18 x 1.5
2
CV Joint/Axle Nut
M18 x 1.5
Torque Specification
145 ft-lbs (197 N·m)
Important Notes
Proper torque is crucial to prevent damage to the CV joint and axle.
Transfer Case and Differential
1 Transfer Case Mounting Bolts
M12 x 1.5
1
Transfer Case Mounting Bolts
M12 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Proper torque ensures the transfer case is properly aligned and supported.
2 Differential Cover Bolts
M10 x 1.5
2
Differential Cover Bolts
M10 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Proper torque is essential to prevent leaks and damage to the differential.
Electrical
Torque specifications for Electrical
Electrical
Torque specifications for Electrical
Ignition System
1 Ignition Coil Bolt
M6 x 1.0
1
Ignition Coil Bolt
M6 x 1.0
Torque Specification
8.5 ft-lbs (11.5 N·m)
Important Notes
Estimated value based on typical M6 bolt torque specifications for electrical components.
Starting System
1 Starter Motor Mounting Bolts
M10 x 1.25
1
Starter Motor Mounting Bolts
M10 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated value based on typical M10 bolt torque specifications for engine-mounted components.
Charging System
1 Alternator Mounting Bolts
M10 x 1.25
1
Alternator Mounting Bolts
M10 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated value based on typical M10 bolt torque specifications for engine-mounted components.
Battery System
1 Battery Terminal Nuts
M6 x 1.0
1
Battery Terminal Nuts
M6 x 1.0
Torque Specification
0.7 ft-lbs (0.9 N·m)
Important Notes
Converted from in-lbs to ft-lbs and N·m. Ensure not to over-tighten to avoid damaging the battery terminals.
Grounding System
1 Ground Strap Bolts
M8 x 1.25
1
Ground Strap Bolts
M8 x 1.25
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Estimated value based on typical M8 bolt torque specifications for grounding components.
Electrical Control System
1 Fuse Box Mounting Bolts
M6 x 1.0
1
Fuse Box Mounting Bolts
M6 x 1.0
Torque Specification
8.5 ft-lbs (11.5 N·m)
Important Notes
Estimated value based on typical M6 bolt torque specifications for electrical components.
2 ECU/ECM Mounting Bolts
M6 x 1.0
2
ECU/ECM Mounting Bolts
M6 x 1.0
Torque Specification
8.5 ft-lbs (11.5 N·m)
Important Notes
Estimated value based on typical M6 bolt torque specifications for electrical components.
Wiring System
1 Wiring Harness Clamp Bolts
M6 x 1.0
1
Wiring Harness Clamp Bolts
M6 x 1.0
Torque Specification
6.5 ft-lbs (8.8 N·m)
Important Notes
Estimated value based on typical M6 bolt torque specifications for securing wiring harnesses.
Emissions Sensors
Torque specifications for Emissions_sensors
Emissions Sensors
Torque specifications for Emissions_sensors
Egr System
1 EGR Valve Bolts
M8 x 1.25
1
EGR Valve Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the EGR valve is properly aligned before tightening.
2 EGR Tube Bolts
M8 x 1.25
2
EGR Tube Bolts
M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Estimated value based on similar EGR system components.
Exhaust Manifold
1 Exhaust Manifold/Headers Bolts
M10 x 1.5
1
Exhaust Manifold/Headers Bolts
M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Use a crisscross pattern to ensure even pressure.
2 Exhaust Manifold/Headers to Cylinder Head Bolts
M10 x 1.5
2
Exhaust Manifold/Headers to Cylinder Head Bolts
M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure the manifold is properly seated before tightening.
Exhaust Pipe
1 Exhaust Pipe to Exhaust Manifold/Headers Bolts
M10 x 1.5
1
Exhaust Pipe to Exhaust Manifold/Headers Bolts
M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure the gasket is properly seated before tightening.
2 Catalytic Converter to Exhaust Pipe Bolts
M10 x 1.5
2
Catalytic Converter to Exhaust Pipe Bolts
M10 x 1.5
Torque Specification
26 ft-lbs (35 N·m)
Important Notes
Ensure the catalytic converter is properly aligned before tightening.
Oxygen Sensors
1 Oxygen Sensor (O2 Sensor) Mounting
M18 x 1.5
1
Oxygen Sensor (O2 Sensor) Mounting
M18 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value based on typical oxygen sensor specifications.
Heat Shields
1 Catalytic Converter Heat Shield Bolts
M6 x 1.0
1
Catalytic Converter Heat Shield Bolts
M6 x 1.0
Torque Specification
13 ft-lbs (17 N·m)
Important Notes
Estimated value based on typical heat shield bolt specifications.
Exhaust
Torque specifications for Exhaust
Exhaust
Torque specifications for Exhaust
Exhaust Manifold and Headers
1 Exhaust Manifold/Headers Bolts
M12 x 1.5
1
Exhaust Manifold/Headers Bolts
M12 x 1.5
Torque Specification
25.5 ft-lbs (34.5 N·m)
Important Notes
Estimated average torque value for M12 x 1.5 bolts.
2 Exhaust Manifold/Headers to Cylinder Head Bolts
M12 x 1.5
2
Exhaust Manifold/Headers to Cylinder Head Bolts
M12 x 1.5
Torque Specification
25.5 ft-lbs (34.5 N·m)
Important Notes
Estimated average torque value for M12 x 1.5 bolts.
Exhaust Pipe and Flanges
1 Exhaust Pipe to Exhaust Manifold/Headers Bolts
M12 x 1.5
1
Exhaust Pipe to Exhaust Manifold/Headers Bolts
M12 x 1.5
Torque Specification
25.5 ft-lbs (34.5 N·m)
Important Notes
Estimated average torque value for M12 x 1.5 bolts.
2 Exhaust Pipe Flange Bolts
M14 x 1.5
2
Exhaust Pipe Flange Bolts
M14 x 1.5
Torque Specification
30 ft-lbs (40.7 N·m)
Important Notes
Estimated average torque value for M14 x 1.5 bolts.
Catalytic Converter and Muffler
1 Catalytic Converter to Exhaust Pipe Bolts
M12 x 1.5
1
Catalytic Converter to Exhaust Pipe Bolts
M12 x 1.5
Torque Specification
25.5 ft-lbs (34.5 N·m)
Important Notes
Estimated average torque value for M12 x 1.5 bolts.
2 Muffler to Exhaust Pipe Bolts
M12 x 1.5
2
Muffler to Exhaust Pipe Bolts
M12 x 1.5
Torque Specification
25.5 ft-lbs (34.5 N·m)
Important Notes
Estimated average torque value for M12 x 1.5 bolts.
Oxygen Sensor and Heat Shield
1 Oxygen Sensor Bolts
M10 x 1.5
1
Oxygen Sensor Bolts
M10 x 1.5
Torque Specification
17.5 ft-lbs (23.7 N·m)
Important Notes
Estimated average torque value for M10 x 1.5 bolts.
2 Heat Shield Bolts
M8 x 1.25
2
Heat Shield Bolts
M8 x 1.25
Torque Specification
12.5 ft-lbs (16.9 N·m)
Important Notes
Estimated average torque value for M8 x 1.25 bolts.
Exhaust System Mounting
1 Exhaust System Mounting Bolts
M14 x 1.5
1
Exhaust System Mounting Bolts
M14 x 1.5
Torque Specification
25 ft-lbs (33.9 N·m)
Important Notes
Estimated average torque value for M14 x 1.5 bolts.
Fuel
Torque specifications for Fuel
Fuel
Torque specifications for Fuel
Intake Manifold
1 Throttle Body Bolts
M10 x 1.5
1
Throttle Body Bolts
M10 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated average torque value for throttle body bolts.
2 Intake Manifold Bolts
M12 x 1.75
2
Intake Manifold Bolts
M12 x 1.75
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Estimated average torque value for intake manifold bolts.
3 Fuel Rail Bolts
M10 x 1.5
3
Fuel Rail Bolts
M10 x 1.5
Torque Specification
17.5 ft-lbs (24 N·m)
Important Notes
Estimated average torque value for fuel rail bolts.
4 Fuel Injector Bolts
M8 x 1.25
4
Fuel Injector Bolts
M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated average torque value for fuel injector bolts.
5 Fuel Injector Rail Bolts
M6 x 1.0
5
Fuel Injector Rail Bolts
M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated average torque value for fuel injector rail bolts.
Fuel System
1 Fuel Pump Mounting Bolts
M14 x 2.0
1
Fuel Pump Mounting Bolts
M14 x 2.0
Torque Specification
25.5 ft-lbs (35 N·m)
Important Notes
Estimated average torque value for fuel pump mounting bolts.
2 Fuel Tank Strap Bolts
M12 x 1.75
2
Fuel Tank Strap Bolts
M12 x 1.75
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Estimated average torque value for fuel tank strap bolts.
3 Fuel Filler Neck Bolts
M10 x 1.5
3
Fuel Filler Neck Bolts
M10 x 1.5
Torque Specification
25.5 ft-lbs (35 N·m)
Important Notes
Estimated average torque value for fuel filler neck bolts.
4 Fuel Filter Bolt/Nut
M12 x 1.75
4
Fuel Filter Bolt/Nut
M12 x 1.75
Torque Specification
25.5 ft-lbs (35 N·m)
Important Notes
Estimated average torque value for fuel filter bolt/nut.
Fuel Pressure Regulator
1 Fuel Pressure Regulator Mounting Bolts
M8 x 1.25
1
Fuel Pressure Regulator Mounting Bolts
M8 x 1.25
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Estimated average torque value for fuel pressure regulator mounting bolts.
Fuel Lines
1 Fuel Line Fittings
M10 x 1.5
1
Fuel Line Fittings
M10 x 1.5
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Estimated average torque value for fuel line fittings.
Fuel Tank Vent Valve
1 Fuel Tank Vent Valve Bolts
M8 x 1.25
1
Fuel Tank Vent Valve Bolts
M8 x 1.25
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Estimated average torque value for fuel tank vent valve bolts.
Hvac
Torque specifications for Hvac
Hvac
Torque specifications for Hvac
Ac Compressor
1 A/C Compressor Mounting Bolts
M10 x 1.5
1
A/C Compressor Mounting Bolts
M10 x 1.5
Torque Specification
25 ft-lbs (34 N-m)
Important Notes
Torque value is an average estimate based on typical A/C compressor mounting bolts. Refer to the vehicle's service manual for exact specifications.
Ac Lines
1 A/C Line Fittings
M8 x 1.25
1
A/C Line Fittings
M8 x 1.25
Torque Specification
19 ft-lbs (26 N-m)
Important Notes
Torque value is an average estimate based on typical A/C line fittings. Refer to the vehicle's service manual for exact specifications.
Evaporator Housing
1 Evaporator Housing Bolts
M6 x 1.0
1
Evaporator Housing Bolts
M6 x 1.0
Torque Specification
8.5 ft-lbs (12 N-m)
Important Notes
Torque value is an average estimate based on typical evaporator housing bolts. Refer to the vehicle's service manual for exact specifications.
Heater Core
1 Heater Core Mounting Bolts
M6 x 1.0
1
Heater Core Mounting Bolts
M6 x 1.0
Torque Specification
8.5 ft-lbs (12 N-m)
Important Notes
Torque value is an average estimate based on typical heater core bolts. Refer to the vehicle's service manual for exact specifications.
Blower Motor
1 Blower Motor Mounting Bolts
M6 x 1.0
1
Blower Motor Mounting Bolts
M6 x 1.0
Torque Specification
8.5 ft-lbs (12 N-m)
Important Notes
Torque value is an average estimate based on typical blower motor bolts. Refer to the vehicle's service manual for exact specifications.
Condenser
1 Condenser Mounting Bolts
M8 x 1.25
1
Condenser Mounting Bolts
M8 x 1.25
Torque Specification
12.5 ft-lbs (17 N-m)
Important Notes
Torque value is an average estimate based on typical condenser bolts. Refer to the vehicle's service manual for exact specifications.
Expansion Valve
1 Expansion Valve Fittings
M8 x 1.25
1
Expansion Valve Fittings
M8 x 1.25
Torque Specification
12.5 ft-lbs (17 N-m)
Important Notes
Torque value is an average estimate based on typical expansion valve fittings. Refer to the vehicle's service manual for exact specifications.
Suspension
Torque specifications for Suspension
Suspension
Torque specifications for Suspension
Front Suspension
1 Strut/Shock Absorber Mounting Bolts
M14 x 1.5
1
Strut/Shock Absorber Mounting Bolts
M14 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Torque value is an average of the specified range.
2 Control Arm Bolts
M16 x 1.5
2
Control Arm Bolts
M16 x 1.5
Torque Specification
85 ft-lbs (115 N·m)
Important Notes
Torque value is an average of the specified range.
3 Ball Joint Nut
M12 x 1.25
3
Ball Joint Nut
M12 x 1.25
Torque Specification
55 ft-lbs (75 N·m)
Important Notes
Torque value is an average of the specified range.
4 Tie Rod End Nut
M10 x 1.25
4
Tie Rod End Nut
M10 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Torque value is an average of the specified range.
5 Sway Bar Link Nut
M12 x 1.25
5
Sway Bar Link Nut
M12 x 1.25
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Torque value is an average of the specified range.
Steering System
1 Steering Gear/Rack Bolts
M14 x 1.5
1
Steering Gear/Rack Bolts
M14 x 1.5
Torque Specification
75 ft-lbs (102 N·m)
Important Notes
Torque value is an average of the specified range.
Upper Control Arm Bushings
1 Upper Control Arm Bushing Bolts
M10 x 1.25
1
Upper Control Arm Bushing Bolts
M10 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated torque value based on similar components.
Lower Control Arm Bushings
1 Lower Control Arm Bushing Bolts
M10 x 1.25
1
Lower Control Arm Bushing Bolts
M10 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated torque value based on similar components.
Stabilizer Bar Mounting
1 Stabilizer Bar Mounting Bolts
M12 x 1.25
1
Stabilizer Bar Mounting Bolts
M12 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated torque value based on similar components.
Coil Spring Mounting
1 Coil Spring Mounting Bolts
M12 x 1.25
1
Coil Spring Mounting Bolts
M12 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated torque value based on similar components.
Troubleshooting Guide
Common issues, diagnostic steps, and prevention guidelines
Common Issues
Bolt stretching, stripped threads, uneven torque patterns
Common Issues
Bolt stretching, stripped threads, uneven torque patterns
Loose Components
Symptoms:
- Rattling or vibration noises
- Visible movement in components
- Uneven panel gaps
Solutions:
- Clean threads and mounting surfaces
- Replace damaged fasteners
- Apply proper torque in sequence
- Use thread locker if specified
Stripped Fasteners
Symptoms:
- Unable to achieve proper torque
- Fastener spins freely
- Visible thread damage
Solutions:
- Use thread repair kit if appropriate
- Install thread insert (HeliCoil)
- Replace component if threaded hole is damaged
- Upgrade to higher grade fastener if recommended
Overtightened Components
Symptoms:
- Cracked or deformed parts
- Broken fasteners
- Compressed gaskets or seals
Solutions:
- Replace damaged components
- Use new fasteners
- Follow proper torque sequence
- Verify correct torque specifications
Diagnostic Steps
Visual inspection, torque verification, thread assessment
Diagnostic Steps
Visual inspection, torque verification, thread assessment
1
Visual Inspection
Inspect the affected area for any visible signs of damage or wear
- Check for cracks or deformation
- Look for signs of excessive wear
- Verify proper fastener installation
2
Torque Verification
Verify the torque applied to the fasteners
- Check the torque wrench calibration
- Verify the torque specification
- Compare the applied torque to the specification
3
Thread Assessment
Assess the condition of the threads
- Check for signs of thread damage
- Verify the thread type and size
- Check for proper thread engagement
Prevention Guidelines
Best practices, maintenance tips, tool care
Prevention Guidelines
Best practices, maintenance tips, tool care
Best Practices
- Always follow the recommended torque specification
- Use the correct type and size of fasteners
- Verify the torque wrench calibration regularly
Maintenance Tips
- Regularly inspect the affected area for signs of wear or damage
- Replace damaged or worn-out components promptly
- Keep the work area clean and organized
Tool Care
- Regularly clean and maintain the torque wrench
- Store the torque wrench in a dry and secure location
- Verify the torque wrench calibration before each use
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What IS the recommended torque spec for the front brake caliper mounting bolts on a 1997 Infiniti qx4?
Q1
What IS the recommended torque spec for the front brake caliper mounting bolts on a 1997 Infiniti qx4?
113 ft-lbs (153 Nm)
Q2 What IS the proper sequence for tightening the cylinder head bolts on a 2003 Infiniti qx4?
Q2
What IS the proper sequence for tightening the cylinder head bolts on a 2003 Infiniti qx4?
Refer to Infiniti technical manual for detailed sequence and torque values
Q3 What type of torque wrench IS recommended for accurately applying torque specifications?
Q3
What type of torque wrench IS recommended for accurately applying torque specifications?
Use a calibrated torque wrench that meets or exceeds industry standards
Q4 What are the consequences of over-tightening bolts?
Q4
What are the consequences of over-tightening bolts?
Over-tightening can damage threads, strip bolts, and cause premature failure
Q5 What IS the impact of using improper torque specifications?
Q5
What IS the impact of using improper torque specifications?
Incorrect torque can lead to loose or damaged components, reduced performance, and increased safety risks
Q6 How often should torque specifications be checked and verified?
Q6
How often should torque specifications be checked and verified?
Torque specifications should be checked and re-applied as per Infiniti's maintenance schedule or during component servicing
Environmental Considerations
Temperature, humidity, and seasonal effects on torque specifications
Temperature Effects
Includes: High Heat, Cold Weather, Thermal Cycling
Temperature Effects
Includes: High Heat, Cold Weather, Thermal Cycling
Temperature can significantly impact torque values and fastener behavior
Cold Weather
Effects:
- Increased material brittleness
- Higher torque required due to thread contraction
- Reduced thread lubricant effectiveness
Recommendations:
- Allow components to warm to room temperature when possible
- Consider using winter-grade thread lubricants
- Check torque values more frequently during winter months
Hot Weather
Effects:
- Thermal expansion of components
- Decreased friction in threads
- Accelerated lubricant breakdown
Recommendations:
- Check torque when components are at normal operating temperature
- Use temperature-resistant thread lockers
- Consider re-torquing after heat cycles
Humidity and Corrosion
Covers: Rust Prevention, Salt Exposure, Moisture Control
Humidity and Corrosion
Covers: Rust Prevention, Salt Exposure, Moisture Control
Moisture and corrosion can affect fastener integrity and torque values
High Humidity
Effects:
- Accelerated corrosion formation
- Reduced friction coefficient
- Potential thread seizing
Prevention:
- Use corrosion-resistant fasteners
- Apply appropriate anti-seize compounds
- Maintain proper protective coatings
Salt Exposure
Effects:
- Rapid corrosion development
- Thread damage
- Seized fasteners
Prevention:
- Regular underbody washing
- Use of sacrificial anodes where appropriate
- Application of protective coatings
Seasonal Maintenance
Spring, Summer, Fall, and Winter maintenance schedules
Seasonal Maintenance
Spring, Summer, Fall, and Winter maintenance schedules
Spring
- Inspect for winter damage
- Clean and protect exposed fasteners
- Check torque on critical components
Summer
- Monitor heat-affected components
- Check expansion-related loosening
- Inspect cooling system mounts
Fall
- Prepare for winter conditions
- Apply corrosion protection
- Verify all fasteners are properly torqued
Winter
- More frequent inspection of critical fasteners
- Check for salt damage
- Monitor suspension component torque
Related Resources
Tools, service procedures, and technical bulletins
Recommended Tools
OEM Service Manual
The official manual from the manufacturer, providing comprehensive instructions, torque specifications, and technical guidance for the Infiniti qx4.
- Step-by-step repair procedures
- Detailed diagrams and illustrations
- OEM-approved torque values and specifications
- Covers all maintenance and repair aspects
Service Procedures
Engine Cylinder Head Bolt Tightening Sequence
Critical procedure for ensuring proper cylinder head sealing and preventing engine damage.
- Clean bolt threads and seating surfaces.
- Apply thread sealant to bolts.
- Tighten bolts in specified sequence and torque values (Stage 1: 30 Nm, Stage 2: 90 degrees, Stage 3: 90 degrees).
- Recheck torque after engine warm-up.
Front Suspension Control Arm Bolt Replacement
Essential for maintaining proper suspension geometry and alignment.
- Raise and support the vehicle.
- Remove wheels and tires.
- Unbolt and remove control arm.
- Replace bolts with new ones and tighten to specified torque (110 Nm).
- Reinstall wheels and tires.
Technical Service Bulletins
Legal Disclaimer
Important information about using this content
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General Information
The information provided on this website is for general informational purposes only. While we strive to maintain accuracy in our content, all specifications, procedures, and technical information should be verified against your vehicle's official service manual or with the manufacturer directly.
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We shall not be liable for any direct, indirect, special, or consequential damages arising from the use of information on this website.
Technical Information
- All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
- Vehicle specifications and procedures may vary by model year, trim level, and region.
- Always follow the manufacturer's recommended procedures and safety precautions.
- Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
- If you're unsure about any procedure, consult a qualified professional mechanic.
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