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 MANUALSGMC1984VALUE VAN P3500, 5.7 M, AUTOMATIC, 400/M40REPAIR AND DIAGNOSISENGINE MECHANICALMECHANICAL6.2L V8 DIESEL - VINS [C,J]ENGINE SPECIFICATIONSVALVE SPECIFICATIONS
1984 GMC Value Van P3500, 5.7 M, Automatic, 400/M40
Valve Specifications
1984 GMC Value Van P3500, 5.7 M, Automatic, 400/M40SECTION Valve Specifications
VALVE SPECIFICATIONS
| Application | In. (mm) | |
|---|---|---|
| Intake | ||
| Head Diameter | N/A | |
| Face Angle | 45° | |
| Seat Angle | 46° | |
| Seat Width | .035-.060 (.89-1.53) | |
| Stem Diameter | N/A | |
| Stem Clearance | .001-.003 (.026-069) | |
| Valve Lift | .421 (10.7) | |
| Exhaust | ||
| Head Diameter | N/A | |
| Face Angle | 45° | |
| Seat Angle | 46° | |
| Seat Width | .062-.093 (1.57-2.36) | |
| Stem Diameter | N/A | |
| Stem Clearance | .001-.003 (.026-.069) | |
| Valve Lift | .421 (10.7) | |
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.