2005 Buick Century LimitedFACTORY OEM SERVICE PROCEDURE

Fastener Tightening Specifications

Fastener Tightening Specifications

Application Specification
Metric English
Accelerator Cable Bracket Bolt 13 N.m 115 lb in
Accelerator Cable Bracket Nut 10 N.m 89 lb in
Accelerator Pedal Bolt and Stud 5 N.m 44 lb in
Air Cleaner Housing Screw 3 N.m 27 lb in
Air Cleaner Intake Duct Clamp 2 N.m 18 lb in
Camshaft Position (CMP) Sensor Bolt 8 N.m 71 lb in
Crankshaft Position 7X (CKP) Sensor Bolt 11 N.m 97 lb in
Crankshaft Position 24X (CKP) Sensor Bolt 10 N.m 89 lb in
Crankshaft Position Sensor Harness Clip Bolt 10 N.m 89 lb in
Engine Coolant Temperature (ECT) Sensor 20 N.m 15 lb ft
EVAP Canister Purge Valve Bracket Bolt 10 N.m 89 lb in
Exhaust Gas Recirculation Pipe Bolt 25 N.m 18 lb ft
Exhaust Gas Recirculation Pipe Nut 25 N.m 18 lb ft
Exhaust Gas Recirculation Valve Bolt 30 N.m 22 lb ft
Fuel Feed Pipe Fitting Nut 30 N.m 22 lb ft
Fuel Filler Pipe Screw to the Fuel Filler Pocket 2.5 N.m 22 lb in
Fuel Filler Pipe Screw to the Underbody 13 N.m 115 lb in
Fuel Filter Mounting Bracket Bolt 20 N.m 15 lb ft
Fuel Pipe Clip Bolt 25 N.m 18 lb ft
Fuel Feed and Return Pipes 17 N.m 13 lb ft
Fuel Pressure Regulator Bolt 8.5 N.m 75 lb in
Fuel Rail Bolt 10 N.m 89 lb in
Fuel Sender Access Panel Nut 10 N.m 89 lb in
Fuel Tank Filler Pipe Hose Clamp 2.5 N.m 22 lb in
Fuel Tank Retaining Strap Bolt 48 N.m 35 lb ft
Heated Oxygen Sensor (HO2S) 42 N.m 31 lb ft
Heater Inlet Pipe Nut 25 N.m 18 lb ft
Idle Air Control (IAC) Valve Screw 3 N.m 27 lb in
Ignition Coil to Ignition Control Module (ICM) Screw 4.5 N.m 40 lb in
Knock Sensor (KS) 19 N.m 14 lb ft
Manifold Absolute Pressure (MAP) Sensor Screw 3 N.m 27 lb in
Powertrain Control Module (PCM) Electrical Connector Bolt 8 N.m 71 lb in
Spark Plug
  • To a New Cylinder Head
 20 N.m 15 lb ft
  • To an Existing Cylinder Head
 15 N.m 11 lb ft
Throttle Body Bolt/Nut 28 N.m 21 lb ft
Throttle Position (TP) Sensor Screw 2 N.m 18 lb in
Factory Service Tools

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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.

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