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 MANUALSCHEVROLET1990CHEVY VAN G20, 4.3 Z, 475/M40REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE MECHANICALMECHANICAL5.7L V8 - VIN [K]ENGINE SPECIFICATIONSBEARING SPECIFICATIONS
1990 Chevrolet Chevy Van G20, 4.3 Z, 475/M40
Bearing Specifications
1990 Chevrolet Chevy Van G20, 4.3 Z, 475/M40SECTION Bearing Specifications
CRANKSHAFT MAIN & CONNECTING ROD BEARINGS SPECS
| Application | In. (mm) | ||
|---|---|---|---|
| Crankshaft End Play | .002-.006 (.05-.15) | ||
| Main Bearings | |||
| Journal Diameter | |||
| No. 1 | 2.4484-2.4493 (62.189-62.212) | ||
| No. 2, 3 & 4 | 2.4481-2.4490 (62.182-62.205) | ||
| No. 5 | 2.4479-2.4488 (62.177-62.200) | ||
| Journal Out-of-Round | .001 (.03) | ||
| Journal Taper | .001 (.03) | ||
| Oil Clearance | |||
| No. 1 | .0010-.0015 (.025-.038) | ||
| No. 2, 3 & 4 | .0010-.0025 (.025-.064) | ||
| No. 5 | .0025-.0035 (.064-.089) | ||
| Connecting Rod Bearings | |||
| Journal Diameter | 2.0988-2.0998 (53.310-53.334) | ||
| Journal Out-of-Round | .001 (.03) | ||
| Journal Taper | .001 (.03) | ||
| Oil Clearance | .0013-.0035 (.033-.089) | ||
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.