1995 Buick Century CustomFACTORY OEM SERVICE PROCEDURE

Torque Specifications

TORQUE SPECIFICATIONS

Application Ft. Lbs. (N.m)
Fuel System
Fuel Inlet & Return Line Nuts
2.2L 22 (30)
3.1L 13 (17)
Intake Manifold Plenum Bolts
3.1L 18 (24)
Throttle Body Bolts
2.2L (1)
3.1L 18 (24)
Upper Manifold Assembly Bolts
2.2L 22 (30)
Harmonic Balancer Bolt
3.1L 110 (149)
Ignition System
Ignition Control Module/Coil Pack Mounting Bolts
2.2L 15-22 (20-30)
Oxygen Sensor 30 (41)
INCH Lbs. (N.m) 
Fuel Pressure Regulator Screws
2.2L 31 (3.5)
3.1L 75 (8.5)
Fuel Rail Retaining Bolts
3.1L 89 (10)
Fuel Injector Retainer Retaining Screws
2.2L 31 (3.5)
Idle Air Control (IAC) Valve Screw
2.2L 26 (3.0)
Throttle Position Sensor Screw 18 (2.0)
Ignition System
Camshaft Position Sensor Bolt
3.1L 89 (10)
Crankshaft Position Sensor Bolt/Nut
2.2L 71 (8.0)
Crankshaft (3X) Position Sensor Bolt
3.1L 71 (8.0)
Crankshaft (24X) Position Sensor Bolt
3.1L 89 (10)
Ignition Coil-To-Module Screws
2.2L & 3.1L 40 (4.5)
(1) Throttle body is part of intake manifold and can not be removed separately.
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.