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 MANUALSCHEVROLET1985STEP VAN P20, 6.2 J, STANDARDREPAIR AND DIAGNOSISENGINE MECHANICALMECHANICAL5.7L V8 - VIN [M]ENGINE SPECIFICATIONSVALVE SPECIFICATIONS
1985 Chevrolet Step Van P20, 6.2 J, Standard
Valve Specifications
1985 Chevrolet Step Van P20, 6.2 J, StandardSECTION Valve Specifications
VALVE SPECIFICATIONS
| Application | In. (mm) | |||
|---|---|---|---|---|
| Intake | ||||
| Head Diameter | (1) | |||
| Face Angle | 45° | |||
| Seat Angle | 46° | |||
| Seat Width | .031-.063 (.79-1.58) | |||
| Stem Diameter | .0010-.0027 (.025-.069) | |||
| Stem Clearance | (1) | |||
| Valve Lift | (1) | |||
| Exhaust | ||||
| Head Diameter | (1) | |||
| Face Angle | 45° | |||
| Seat Angle | 46° | |||
| Seat Width | .063-.094 (1.58-2.38) | |||
| Stem Diameter | (1) | |||
| Stem Clearance | .0010-.0027 (.025-.069) | |||
| Valve Lift | (1) | |||
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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.