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 MANUALSPONTIAC1987GRAND PRIX BASE, 4.3 Z, 200C/MV9REPAIR AND DIAGNOSISENGINE MECHANICALMECHANICAL4.3L V6 - VIN [Z]ENGINE SPECIFICATIONSBEARING SPECIFICATIONS
1987 Pontiac Grand Prix Base, 4.3 Z, 200C/MV9
Bearing Specifications
1987 Pontiac Grand Prix Base, 4.3 Z, 200C/MV9SECTION Bearing Specifications
CRANKSHAFT MAIN & CONNECTING ROD BEARINGS
| Application | In. (mm) | ||
|---|---|---|---|
| Main Bearings | |||
| Journal Diameter | |||
| Front | 2.4484-2.4493 (62.189-62.212) | ||
| Intermediate | 2.4481-2.4490 (62.182-62.205) | ||
| Rear | 2.4479-2.4488 (62.177-62.199) | ||
| Clearance | |||
| Front | .0008-.0020 (.020-.050) | ||
| Intermediate | .0011-.0023 (.028-.058) | ||
| Rear | .0017-.0032 (.034-.081) | ||
| Thrust Bearing | No. 4 | ||
| Crankshaft End Play | .002-.006 (.05-.15) | ||
| Connecting Rod Bearings | |||
| Journal Diameter | 2.0988-2.0998 (53.310-53.335) | ||
| Clearance | .0013-.0035 (.033-.089) | ||
| Side Play | .006-.014 (.15-.36) | ||
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.