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 MANUALSPONTIAC19906000 LE, 4D SEDAN, 2.5 RREPAIR AND DIAGNOSISENGINE MECHANICALMECHANICAL2.5L 4-CYL - VINS [R,U]ENGINE SPECIFICATIONSPISTON/PIN/RING SPECIFICATIONS
1990 Pontiac 6000 LE, 4D Sedan, 2.5 R
Piston/Pin/Ring Specifications
1990 Pontiac 6000 LE, 4D Sedan, 2.5 RSECTION Piston/Pin/Ring Specifications
PISTONS, PINS & RINGS SPECIFICATIONS
| Application | In. (mm) | ||
|---|---|---|---|
| Piston Clearance | .0014-.0022 (.036-.056) | ||
| Pins | |||
| Diameter | .927-.928 (23.546-23.561) | ||
| Piston Fit | |||
| VIN R | .0003-.0005 (.008-.013) | ||
| VIN U | .0004-.0006 (.010-.015) | ||
| Rod Fit | Press | ||
| Rings | |||
| No. 1 | |||
| End Gap | .010-.020 (.25-.51) | ||
| Side Clearance | .002-.003 (.05-.07) | ||
| No. 2 | |||
| End Gap | .010-.020 (.25-.51) | ||
| Side Clearance | .001-.003 (.03-.07) | ||
| No. 3 (Oil) | |||
| End Gap | .020-.060 (.51-1.52) | ||
| Side Clearance | .015-.055 (.38-1.40) | ||
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.