Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2003 Buick Century CustomFACTORY OEM SERVICE PROCEDURE
Torque Specifications
TORQUE SPECIFICATIONS
| Application | Ft. Lbs. (N.m) | |
|---|---|---|
| Case Cover-To-Driven Sprocket Support Bolts | 18 (25) | |
| Case Extension-To-Case Bolts | 26 (36) | |
| Case Side Cover-To-Case | ||
| Bolts | 18 (25) | |
| Stud | 18 (25) | |
| Case Side Cover-To-Case Bolt (TORX(R) Special) | 18 (25) | |
| Case-To-Drive Sprocket Support Bolts | 18 (25) | |
| Manual Shaft/Detent Nut | 23 (32) | |
| Oil Cooler Fittings | 28 (38) | |
| Oil Cooler Quick Connector | 28 (38) | |
| Oil Cooler Quick Connector With Check Ball | 28 (38) | |
| TFP Switch-To-Case Bolts | 11 (16) | |
| Torque Converter-To-Flexplate Bolts | 46 (63) | |
| Transaxle Brace-To-Engine Bolts | 46 (63) | |
| Transaxle Brace-To-Transaxle Bolts | 32 (43) | |
| Transaxle Mount Bracket Bolts | 70 (95) | |
| Transaxle Mount Nuts | ||
| Lower | 35 (47) | |
| Upper | 35 (47) | |
| Transaxle Shift Cable Bracket Bolts | 22 (30) | |
| Transaxle-To-Engine Bolt/Stud | 55 (75) | |
| Transaxle Wiring Ground Nut | 18 (25) | |
| Valve Body-To-Driven Sprocket Support | 18 (25) | |
| 2-1 Servo-To-Case Bolts | 18 (25) | |
| INCH Lbs. (N.m) | ||
| Accumulator Cover-To-Case Bolts | 106 (12) | |
| Case Cover-To-Case Bolts | 106 (12) | |
| Case Cover-To-Driven Sprocket Support Bolts (TORX(R)) | 106 (12) | |
| Detent Spring-To-Case Cover Bolts | 106 (12) | |
| Fluid Filler Tube Bracket Bolt | 115 (13) | |
| Forward Band Servo Cover-To-Case Bolts | 106 (12) | |
| Oil Cooler Hose/Pipes Retaining Bracket Bolt | 27 (4) | |
| Oil Pan-To-Case Bolts | 124 (14) | |
| Oil Pressure Test Hole Plug | 106 (12) | |
| Pump Cover-To-Case Cover Bolts | 106 (12) | |
| Pump Cover-To-Pump Body Bolts | 70 (8) | |
| Speed Sensor-To-Case Bolt | 106 (12) | |
| TFP Switch-To-Case Cover Bolts | 106 (12) | |
| TFP Switch-To-Valve Body Bolts | 70 (8) | |
| Torque Converter Cover Bolts | 89 (10) | |
| Valve Body-To-Case Bolts | 106 (12) | |
| Valve Body-To-Case Cover Bolts | 106 (12) | |
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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