Pontiac Vehicle Models Pontiac Bonneville 1992-1999
Pontiac Vehicle Models Pontiac Bonneville 1992-1999 Torque Specifications
Complete Pontiac Vehicle Models Pontiac Bonneville 1992-1999 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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3.8l Engine
Torque specifications for 3.8L Engine
3.8l Engine
Torque specifications for 3.8L Engine
Cylinder Head and Engine Block
1 Cylinder Head Bolts
M12 x 1.5
1
Cylinder Head Bolts
M12 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated value based on similar components.
2 Engine Block to Transmission Mounting Bolts
M14 x 1.5
2
Engine Block to Transmission Mounting Bolts
M14 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value based on general industry standards.
Main Bearings and Crankshaft
1 Main Bearing Bolts
M16 x 1.5
1
Main Bearing Bolts
M16 x 1.5
Torque Specification
72 ft-lbs (98 N·m)
2 Crankshaft Pulley/Harmonic Balancer Bolt
M18 x 1.5
2
Crankshaft Pulley/Harmonic Balancer Bolt
M18 x 1.5
Torque Specification
78 ft-lbs (106 N·m)
Valve Train and Timing System
1 Camshaft Sprocket Bolt
M14 x 1.5
1
Camshaft Sprocket Bolt
M14 x 1.5
Torque Specification
42 ft-lbs (57 N·m)
2 Timing Belt/Chain Tensioner Bolt
M12 x 1.5
2
Timing Belt/Chain Tensioner Bolt
M12 x 1.5
Torque Specification
19 ft-lbs (26 N·m)
Intake and Exhaust System
1 Intake Manifold Bolts
M12 x 1.5
1
Intake Manifold Bolts
M12 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
2 Exhaust Manifold/Headers Bolts
M12 x 1.5
2
Exhaust Manifold/Headers Bolts
M12 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Cooling System
1 Water Pump Bolts
M12 x 1.5
1
Water Pump Bolts
M12 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
2 Water Pump Pulley Bolts
M10 x 1.5
2
Water Pump Pulley Bolts
M10 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
Ignition System
1 Spark Plugs
M14 x 1.25
1
Spark Plugs
M14 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Engine Sensors
1 Crankshaft Position Sensor Bolt
M10 x 1.5
1
Crankshaft Position Sensor Bolt
M10 x 1.5
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value based on general industry standards.
2 Camshaft Position Sensor Bolt
M10 x 1.5
2
Camshaft Position Sensor Bolt
M10 x 1.5
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value based on general industry standards.
3 Engine Oil Pressure Sensor Bolt
M10 x 1.5
3
Engine Oil Pressure Sensor Bolt
M10 x 1.5
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value based on general industry standards.
3.8l V6 Engine
Torque specifications for 3.8L-V6 Engine
3.8l V6 Engine
Torque specifications for 3.8L-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
20 ft-lbs (27 N·m)
Important Notes
Estimated value based on similar components.
2 Engine Block to Transmission Mounting Bolts
M14 x 1.5
2
Engine Block to Transmission Mounting Bolts
M14 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value based on general industry standards.
Main Bearings and Crankshaft
1 Main Bearing Bolts
M16 x 1.5
1
Main Bearing Bolts
M16 x 1.5
Torque Specification
72 ft-lbs (98 N·m)
2 Crankshaft Pulley/Harmonic Balancer Bolt
M18 x 1.5
2
Crankshaft Pulley/Harmonic Balancer Bolt
M18 x 1.5
Torque Specification
78 ft-lbs (106 N·m)
Valve Train and Timing System
1 Camshaft Sprocket Bolt
M14 x 1.5
1
Camshaft Sprocket Bolt
M14 x 1.5
Torque Specification
42 ft-lbs (57 N·m)
2 Timing Belt/Chain Tensioner Bolt
M12 x 1.5
2
Timing Belt/Chain Tensioner Bolt
M12 x 1.5
Torque Specification
19 ft-lbs (26 N·m)
Intake and Exhaust System
1 Intake Manifold Bolts
M12 x 1.5
1
Intake Manifold Bolts
M12 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
2 Exhaust Manifold/Headers Bolts
M12 x 1.5
2
Exhaust Manifold/Headers Bolts
M12 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Cooling System
1 Water Pump Bolts
M12 x 1.5
1
Water Pump Bolts
M12 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
2 Water Pump Pulley Bolts
M10 x 1.5
2
Water Pump Pulley Bolts
M10 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
Ignition System
1 Spark Plugs
M14 x 1.25
1
Spark Plugs
M14 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Engine Sensors
1 Crankshaft Position Sensor Bolt
M10 x 1.5
1
Crankshaft Position Sensor Bolt
M10 x 1.5
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value based on general industry standards.
2 Camshaft Position Sensor Bolt
M10 x 1.5
2
Camshaft Position Sensor Bolt
M10 x 1.5
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value based on general industry standards.
3 Engine Oil Pressure Sensor Bolt
M10 x 1.5
3
Engine Oil Pressure Sensor Bolt
M10 x 1.5
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value based on general industry standards.
4l60 Transmission
Torque specifications for 4l60 Transmission
4l60 Transmission
Torque specifications for 4l60 Transmission
Transmission Mounting
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, consult manufacturer's documentation for specific torque values.
Transmission Case
1 4L60 Transmission Case Bolts (upper and lower)
M10 x 1.25
1
4L60 Transmission Case Bolts (upper and lower)
M10 x 1.25
Torque Specification
37.5 ft-lbs (50.5 N·m)
Important Notes
Estimated value, consult manufacturer's documentation for specific torque values.
Transmission Bellhousing
1 4L60 Transmission Bellhousing Bolts
M12 x 1.5
1
4L60 Transmission Bellhousing Bolts
M12 x 1.5
Torque Specification
32.5 ft-lbs (44 N·m)
Important Notes
Estimated value, consult manufacturer's documentation for specific torque values.
Transmission Crossmember
1 4L60 Transmission Crossmember Bolts
M14 x 1.5
1
4L60 Transmission Crossmember Bolts
M14 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated value, consult manufacturer's documentation for specific torque values.
Transmission Oil Pan
1 Transmission Oil Pan Bolts
M8 x 1.25
1
Transmission Oil Pan Bolts
M8 x 1.25
Torque Specification
90 in-lbs (10.2 N·m)
Important Notes
Estimated value, consult manufacturer's documentation for specific torque values.
Transmission Drain And Fill
1 Transmission Drain and Fill Plugs
M12 x 1.5
1
Transmission Drain and Fill Plugs
M12 x 1.5
Torque Specification
17.5 ft-lbs (23.7 N·m)
Important Notes
Estimated value, consult manufacturer's documentation for specific torque values.
Transmission Cooler Lines
1 4L60 Transmission Cooler Line Fittings
M10 x 1.25
1
4L60 Transmission Cooler Line Fittings
M10 x 1.25
Torque Specification
17.5 ft-lbs (23.7 N·m)
Important Notes
Estimated value, consult manufacturer's documentation for specific torque values.
Transmission Filter
1 4L60 Transmission Filter Bolts
M8 x 1.25
1
4L60 Transmission Filter Bolts
M8 x 1.25
Torque Specification
12.5 ft-lbs (16.9 N·m)
Important Notes
Estimated value, consult manufacturer's documentation for specific torque values.
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
45 ft-lbs (61 N·m)
Important Notes
Torque value is critical for proper alignment and stability.
2 Control Arm Bolts
M16 x 1.5
2
Control Arm Bolts
M16 x 1.5
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
Torque value is critical for proper alignment and stability.
3 Ball Joint Nut
M12 x 1.5
3
Ball Joint Nut
M12 x 1.5
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Torque value is critical for proper movement and stability.
4 Tie Rod End Nut
M10 x 1.5
4
Tie Rod End Nut
M10 x 1.5
Torque Specification
42 ft-lbs (57 N·m)
Important Notes
Torque value is critical for proper alignment and stability.
5 Steering Gear/Rack Bolts
M14 x 1.5
5
Steering Gear/Rack Bolts
M14 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Torque value is critical for proper movement and stability.
Body and Frame
1 Body Mounting Bolts
M12 x 1.5
1
Body Mounting Bolts
M12 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Estimated torque value. Consult manufacturer's instructions for accurate information.
2 Fuel Tank Strap Bolts
M10 x 1.5
2
Fuel Tank Strap Bolts
M10 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Torque value is critical for proper security and stability.
3 Wheelhouse Panel Bolts
M8 x 1.25
3
Wheelhouse Panel Bolts
M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated torque value. Consult manufacturer's instructions for accurate information.
4 Hood and Trunk Lid Hinges Bolts
M8 x 1.25
4
Hood and Trunk Lid Hinges Bolts
M8 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated torque value. Consult manufacturer's instructions for accurate information.
5 Bumper Mounting Bolts
M10 x 1.5
5
Bumper Mounting Bolts
M10 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Estimated torque value. Consult manufacturer's instructions for accurate information.
Brakes
Torque specifications for Brakes
Brakes
Torque specifications for Brakes
Brake Caliper and Mounting
1 Brake Caliper Bolts
M12 x 1.5
1
Brake Caliper Bolts
M12 x 1.5
Torque Specification
27.5 ft-lbs (37.3 N·m)
Important Notes
Estimated average value between 25-30 ft-lbs (34-41 Nm)
2 Brake Caliper Mounting Bracket Bolts
M14 x 1.5
2
Brake Caliper Mounting Bracket Bolts
M14 x 1.5
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
Estimated average value between 80-100 ft-lbs (108-135 Nm)
Brake Disc/Drum and Rotor
1 Brake Disc/Drum Retaining Bolts
M10 x 1.25
1
Brake Disc/Drum Retaining Bolts
M10 x 1.25
Torque Specification
17.5 ft-lbs (23.7 N·m)
Important Notes
Estimated average value between 15-20 ft-lbs (20-27 Nm)
2 Brake Rotor Mounting Bolts (if applicable)
M12 x 1.5
2
Brake Rotor Mounting Bolts (if applicable)
M12 x 1.5
Torque Specification
35 ft-lbs (47.5 N·m)
Important Notes
Estimated average value between 30-40 ft-lbs (41-54 Nm)
3 Brake Drum Mounting Bolts (if applicable)
M12 x 1.5
3
Brake Drum Mounting Bolts (if applicable)
M12 x 1.5
Torque Specification
35 ft-lbs (47.5 N·m)
Important Notes
Estimated average value between 30-40 ft-lbs (41-54 Nm)
Master Cylinder and ABS
1 Master Cylinder Mounting Bolts
M10 x 1.25
1
Master Cylinder Mounting Bolts
M10 x 1.25
Torque Specification
22.5 ft-lbs (30.5 N·m)
Important Notes
Estimated average value between 20-25 ft-lbs (27-34 Nm)
2 ABS Sensor Mounting Bolts (if equipped)
M8 x 1.25
2
ABS Sensor Mounting Bolts (if equipped)
M8 x 1.25
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Estimated average value between 10-15 ft-lbs (14-20 Nm)
Wheel and Brake Line
1 Wheel Lug Nuts
M14 x 1.5
1
Wheel Lug Nuts
M14 x 1.5
Torque Specification
100 ft-lbs (135 N·m)
2 Brake Line Mounting Clips
M8 x 1.25
2
Brake Line Mounting Clips
M8 x 1.25
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Estimated average value between 10-15 ft-lbs (14-20 Nm)
Drivetrain
Torque specifications for Drivetrain
Drivetrain
Torque specifications for Drivetrain
Engine Block
1 Main Bearing Bolts
M14 x 1.5
1
Main Bearing Bolts
M14 x 1.5
Torque Specification
72.5 ft-lbs (98.5 N·m)
Important Notes
Estimated average value from 70-75 ft-lbs range.
2 Connecting Rod Nuts
M10 x 1.25
2
Connecting Rod Nuts
M10 x 1.25
Torque Specification
25 ft-lbs (33.9 N·m)
Important Notes
Estimated average value from 24-26 ft-lbs range.
Crankshaft and Pulley
1 Flywheel Bolts
M12 x 1.5
1
Flywheel Bolts
M12 x 1.5
Torque Specification
53 ft-lbs (71.9 N·m)
Important Notes
Estimated average value from 52-54 ft-lbs range.
2 Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 1.5
2
Crankshaft Pulley/Harmonic Balancer Bolt
M16 x 1.5
Torque Specification
78.5 ft-lbs (106.5 N·m)
Important Notes
Estimated average value from 76-81 ft-lbs range.
Transmission and Mounting
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 average value from 40-50 ft-lbs range.
Driveshaft and Axles
1 Drive Axle/Half Shaft Bolts
M14 x 1.5
1
Drive Axle/Half Shaft Bolts
M14 x 1.5
Torque Specification
65 ft-lbs (88.1 N·m)
Important Notes
Estimated average value from 60-70 ft-lbs range.
2 CV Joint/Axle Nut
M20 x 1.5
2
CV Joint/Axle Nut
M20 x 1.5
Torque Specification
190 ft-lbs (257.5 N·m)
Important Notes
Estimated average value from 180-200 ft-lbs range.
Differential and Cover
1 Differential Drain/Fill Plug
M12 x 1.5
1
Differential Drain/Fill Plug
M12 x 1.5
Torque Specification
27.5 ft-lbs (37.3 N·m)
Important Notes
Estimated average value from 25-30 ft-lbs range.
2 Differential Cover Bolts
M10 x 1.25
2
Differential Cover Bolts
M10 x 1.25
Torque Specification
35 ft-lbs (47.5 N·m)
Important Notes
Estimated average value from 30-40 ft-lbs range.
Propeller Shaft and Bolts
1 Propeller/Drive Shaft Bolts
M10 x 1.25
1
Propeller/Drive Shaft Bolts
M10 x 1.25
Torque Specification
13.5 ft-lbs (18.3 N·m)
Important Notes
Estimated average value from 12-15 ft-lbs range.
Sensors and Mounting
1 Crankshaft Position Sensor Bolt
M8 x 1.25
1
Crankshaft Position Sensor Bolt
M8 x 1.25
Torque Specification
12.5 ft-lbs (16.9 N·m)
Important Notes
Estimated average value from 10-15 ft-lbs range.
2 Camshaft Position Sensor Bolt
M8 x 1.25
2
Camshaft Position Sensor Bolt
M8 x 1.25
Torque Specification
12.5 ft-lbs (16.9 N·m)
Important Notes
Estimated average value from 10-15 ft-lbs range.
Transmission Pan and Bolts
1 Transmission Pan Bolts
M10 x 1.25
1
Transmission Pan Bolts
M10 x 1.25
Torque Specification
90 ft-lbs (122.1 N·m)
Important Notes
Estimated average value from 80-100 inch-lbs range, converted to ft-lbs.
Electrical
Torque specifications for Electrical
Electrical
Torque specifications for Electrical
Alternator And Starter Motor
1 Alternator Mounting Bolts
M12 x 1.5
1
Alternator Mounting Bolts
M12 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Estimated average torque value from specified range.
2 Starter Motor Mounting Bolts
M10 x 1.25
2
Starter Motor Mounting Bolts
M10 x 1.25
Torque Specification
27.5 ft-lbs (37.5 N·m)
Important Notes
Estimated average torque value from specified range.
Battery And Electrical Connectors
1 Battery Terminal Nuts
M8 x 1.25
1
Battery Terminal Nuts
M8 x 1.25
Torque Specification
110 in-lbs (12.5 N·m)
2 Fuel Pump Electrical Connector Bolts
M6 x 1.0
2
Fuel Pump Electrical Connector Bolts
M6 x 1.0
Torque Specification
7.5 ft-lbs (10.5 N·m)
Important Notes
Estimated average torque value from specified range.
Ignition Coil And Spark Plug Wires
1 Ignition Coil Bracket Bolts
M8 x 1.25
1
Ignition Coil Bracket Bolts
M8 x 1.25
Torque Specification
12.5 ft-lbs (17 N·m)
Important Notes
Estimated average torque value from specified range.
2 Spark Plug Wire Retainer Bolts
M5 x 0.8
2
Spark Plug Wire Retainer Bolts
M5 x 0.8
Torque Specification
7.5 ft-lbs (10.5 N·m)
Important Notes
Estimated average torque value from specified range.
Emissions Sensors
Torque specifications for Emissions_sensors
Emissions Sensors
Torque specifications for Emissions_sensors
Emissions Sensors
1 EGR Valve Bolts
M10 x 1.5
1
EGR Valve Bolts
M10 x 1.5
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
Secure the EGR valve to the engine block.
2 Oxygen Sensor Bolts
M12 x 1.25
2
Oxygen Sensor Bolts
M12 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated value. Secure the oxygen sensor to the exhaust manifold.
3 Heated Oxygen Sensor (HO2S) Connector Bolts
M6 x 1.0
3
Heated Oxygen Sensor (HO2S) Connector Bolts
M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Estimated value. Secure the HO2S connector to the engine compartment.
4 Knock Sensor Bolts
M8 x 1.25
4
Knock Sensor Bolts
M8 x 1.25
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Estimated value. Secure the knock sensor to the engine block.
5 Coolant Temperature Sensor Bolts
M6 x 1.0
5
Coolant Temperature Sensor Bolts
M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Estimated value. Secure the coolant temperature sensor to the engine block.
Exhaust
Torque specifications for Exhaust
Exhaust
Torque specifications for Exhaust
Exhaust Manifold Headers
1 Exhaust Manifold/Headers Bolts
M12 x 1.5
1
Exhaust Manifold/Headers Bolts
M12 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Torque value is an average of the recommended range (18-22 ft-lbs).
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
20 ft-lbs (27 N·m)
Important Notes
Torque value is an average of the recommended range (18-22 ft-lbs).
Exhaust Pipe
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
20 ft-lbs (27 N·m)
Important Notes
Torque value is an average of the recommended range (18-22 ft-lbs).
2 Catalytic Converter to Exhaust Pipe Bolts
M12 x 1.5
2
Catalytic Converter to Exhaust Pipe Bolts
M12 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Torque value is an average of the recommended range (18-22 ft-lbs).
3 Muffler to Exhaust Pipe Bolts
M12 x 1.5
3
Muffler to Exhaust Pipe Bolts
M12 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Torque value is an average of the recommended range (18-22 ft-lbs).
Exhaust System Accessories
1 Oxygen Sensor Bolts
M10 x 1.25
1
Oxygen Sensor Bolts
M10 x 1.25
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Torque value is an estimate based on general industry standards.
2 Exhaust System Hanger Bolts
M12 x 1.5
2
Exhaust System Hanger Bolts
M12 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Torque value is an estimate based on general industry standards.
3 Heat Shield Bolts
M8 x 1.25
3
Heat Shield Bolts
M8 x 1.25
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Torque value is an estimate based on general industry standards.
4 Exhaust System Clamp Bolts
M8 x 1.25
4
Exhaust System Clamp Bolts
M8 x 1.25
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Torque value is an estimate based on general industry standards.
Fuel
Torque specifications for Fuel
Fuel
Torque specifications for Fuel
Intake Manifold and Throttle Body
1 Throttle Body Bolts
M10 x 1.5
1
Throttle Body Bolts
M10 x 1.5
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Estimated average value from 14-18 ft-lbs range.
2 Intake Manifold Bolts
M12 x 1.75
2
Intake Manifold Bolts
M12 x 1.75
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated average value from 18-22 ft-lbs range.
Fuel Rail and Injectors
1 Fuel Rail Bolts
M8 x 1.25
1
Fuel Rail Bolts
M8 x 1.25
Torque Specification
93 in-lbs (11 N·m)
Important Notes
Estimated average value from 89-97 in-lbs range.
2 Fuel Injector Bolts
M10 x 1.5
2
Fuel Injector Bolts
M10 x 1.5
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated average value from 11-13 ft-lbs range.
Fuel Pump and Tank
1 Fuel Pump Mounting Bolts
M12 x 1.75
1
Fuel Pump Mounting Bolts
M12 x 1.75
Torque Specification
90 in-lbs (10 N·m)
Important Notes
Estimated average value from 80-100 in-lbs range.
2 Fuel Tank Strap Bolts
M14 x 2.0
2
Fuel Tank Strap Bolts
M14 x 2.0
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated average value from 35-45 ft-lbs range.
Fuel Filler Neck and Filter
1 Fuel Filler Neck Bolts
M10 x 1.5
1
Fuel Filler Neck Bolts
M10 x 1.5
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated average value from 15-20 ft-lbs range.
2 Fuel Filter Bolt/Nut
M12 x 1.75
2
Fuel Filter Bolt/Nut
M12 x 1.75
Torque Specification
23 ft-lbs (31 N·m)
Important Notes
Estimated average value from 22-24 ft-lbs range.
Additional Fuel System Components
1 Fuel Pressure Regulator Bolt
M8 x 1.25
1
Fuel Pressure Regulator Bolt
M8 x 1.25
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated average value from 10-15 ft-lbs range.
2 Fuel Injector O-Ring Bolts
M6 x 1.0
2
Fuel Injector O-Ring Bolts
M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated average value from 5-10 ft-lbs range.
3 Fuel Rail Bracket Bolts
M10 x 1.5
3
Fuel Rail Bracket Bolts
M10 x 1.5
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated average value from 10-15 ft-lbs range.
Hvac
Torque specifications for Hvac
Hvac
Torque specifications for Hvac
A/C Compressor
1 A/C Compressor Mounting Bolts
M12 x 1.5
1
A/C Compressor Mounting Bolts
M12 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Torque value is an average of the recommended range.
2 A/C Compressor Clutch Bolts
M10 x 1.25
2
A/C Compressor Clutch Bolts
M10 x 1.25
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Estimated value based on general industry standards.
A/C Condenser
1 A/C Condenser Mounting Bolts
M12 x 1.5
1
A/C Condenser Mounting Bolts
M12 x 1.5
Torque Specification
17 ft-lbs (23 N·m)
Important Notes
Estimated value based on general industry standards.
A/C Evaporator
1 A/C Evaporator Mounting Bolts
M10 x 1.25
1
A/C Evaporator Mounting Bolts
M10 x 1.25
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Estimated value based on general industry standards.
A/C Lines and Fittings
1 A/C Line Fittings
M12 x 1.5
1
A/C Line Fittings
M12 x 1.5
Torque Specification
13 ft-lbs (18 N·m)
Important Notes
Torque value is an average of the recommended range.
2 A/C Orifice Tube Fittings
M10 x 1.25
2
A/C Orifice Tube Fittings
M10 x 1.25
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Estimated value based on general industry standards.
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
45 ft-lbs (61 N·m)
2 Control Arm Bolts
M16 x 1.5
2
Control Arm Bolts
M16 x 1.5
Torque Specification
90 ft-lbs (122 N·m)
3 Upper Control Arm Bushing Bolt
M12 x 1.5
3
Upper Control Arm Bushing Bolt
M12 x 1.5
Torque Specification
50 ft-lbs (68 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.
4 Lower Control Arm Bolt
M18 x 1.5
4
Lower Control Arm Bolt
M18 x 1.5
Torque Specification
100 ft-lbs (135 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.
5 Steering Knuckle Bolt
M20 x 1.5
5
Steering Knuckle Bolt
M20 x 1.5
Torque Specification
100 ft-lbs (135 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.
Steering System
1 Tie Rod End Nut
M14 x 1.5
1
Tie Rod End Nut
M14 x 1.5
Torque Specification
42 ft-lbs (57 N·m)
Sway Bar System
1 Sway Bar Link Nut
M12 x 1.5
1
Sway Bar Link Nut
M12 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Spring and Strut Mounts
1 Coil Spring or Strut Mount Nut
M14 x 1.5
1
Coil Spring or Strut Mount Nut
M14 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Estimated value based on similar components and bolt sizes.
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 proper torque for the cylinder head bolts on a 1993 Pontiac Bonneville?
Q1
What IS the proper torque for the cylinder head bolts on a 1993 Pontiac Bonneville?
115 ft-lbs (155 Nm) in three steps: 65 ft-lbs (88 Nm), 90 ft-lbs (122 Nm), and 115 ft-lbs (155 Nm).
Q2 What torque wrench IS recommended for tightening suspension components on a 1997 Pontiac Bonneville?
Q2
What torque wrench IS recommended for tightening suspension components on a 1997 Pontiac Bonneville?
A torque wrench with a range of 20-250 ft-lbs (27-339 Nm) and a 1/2-inch drive IS suitable.
Q3 IS it necessary to use a torque wrench when tightening spark plugs in a 1992 Pontiac Bonneville?
Q3
IS it necessary to use a torque wrench when tightening spark plugs in a 1992 Pontiac Bonneville?
Yes, over or under-tightening spark plugs can damage the engine. Use a torque wrench to tighten spark plugs to 20-25 ft-lbs (27-34 Nm).
Q4 What IS the torque specification for the crankshaft pulley bolt on a 1998 Pontiac Bonneville?
Q4
What IS the torque specification for the crankshaft pulley bolt on a 1998 Pontiac Bonneville?
214 ft-lbs (290 Nm)
Q5 What are the recommended torque values for tightening lug nuts on a 1999 Pontiac Bonneville?
Q5
What are the recommended torque values for tightening lug nuts on a 1999 Pontiac Bonneville?
100 ft-lbs (136 Nm) using a torque wrench and following a star pattern for even tightening.
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
Digital Torque Wrench (10-100 Nm)
Essential for tightening fasteners to precise torque specifications, preventing damage and ensuring proper assembly. This range IS suitable for many applications on the Bonneville.
- Digital display for accurate readings
- Audible alarm when target torque IS reached
- Multiple units (Nm, ft-lb, in-lb)
- Reversible ratcheting mechanism
Service Procedures
Cylinder Head Bolt Torque Sequence
Technical procedure for tightening cylinder head bolts in the correct sequence to ensure proper sealing and prevent damage to the engine.
- Remove valve covers and timing belt
- Clean and inspect cylinder head and block surfaces
- Apply a thin layer of engine oil to bolt threads
- Tighten bolts to 22 ft-lb (30 Nm) in the sequence specified in the service manual
- Reinstall timing belt and valve covers
Spark Plug Replacement and Torque
Procedure for replacing spark plugs and tightening them to the correct torque to ensure proper ignition and prevent damage.
- Remove ignition coils
- Use a spark plug socket to remove old spark plugs
- Apply anti-seize compound to new spark plugs
- Thread new spark plugs into cylinder head by hand
- Tighten spark plugs to 18 ft-lb (25 Nm)
Wheel Lug Nut Tightening Procedure
Important procedure for tightening wheel lug nuts to the correct torque to ensure proper wheel mounting and prevent wheel detachment.
- Park vehicle on a level surface and engage parking brake
- Use a torque wrench to tighten lug nuts to 100 ft-lb (135 Nm) in a star pattern
- Double-check torque on all lug nuts
Technical Service Bulletins
Engine Overheating Due to Incorrect Torque on Cylinder Head Bolts
1998-08-15Technical Service Bulletin issued by GM to address overheating issues caused by improperly torqued cylinder head bolts.
1996-1999 Bonneville
Resolution: Retighten cylinder head bolts to the correct torque specifications as outlined in the service manual (22 ft-lb / 30 Nm)
Brake Pedal Pulsation Due to Incorrect Torque on Wheel Lug Nuts
1994-12-22Technical Service Bulletin addressing brake pedal pulsation resulting from improperly torqued wheel lug nuts.
1992-1999 Bonneville
Resolution: Retighten all wheel lug nuts to the correct torque specifications (100 ft-lb / 135 Nm) using a torque wrench
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Technical Information
- All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
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