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.
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HOMESERVICE MANUALSBUICK1991CENTURY L4-151 2.5L VIN R TBIREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER BLOCK ASSEMBLYPISTON PIN, ENGINE
1991 Buick Century L4-151 2.5L VIN R TBI
Piston Pin, Engine
1991 Buick Century L4-151 2.5L VIN R TBISECTION Piston Pin, Engine
Vin R & U, Piston Pin Dimensions
| Piston Pin Diameter Note: Pistons & pins are matched set and should be replaced as an assembly. | 0.9270-0.9280 |
| Piston Pin To Piston Clearance | 0.0003-0.0005 |
RENDER: 1.0x
NO RELATED
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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.