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 MANUALSCHEVROLET1985CHEVY VAN G30, 5.7 M, 400/M40REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISFUEL INJECTION SYSTEM - 6.2L DIESELREMOVAL & INSTALLATIONINJECTION PUMP SEAL REPLACEMENTAUTOMATIC ADVANCE SEALS
1985 Chevrolet Chevy Van G30, 5.7 M, 400/M40
Automatic Advance Seals
1985 Chevrolet Chevy Van G30, 5.7 M, 400/M40SECTION Automatic Advance Seals
- Remove advance pin hole plug as previously described. Remove spring side advance piston hole plug. Remove plug, piston, spring and washer.
- Remove power side advance piston hole plug. Remove plug, piston and washer. Disassemble plugs and pistons. Discard seals.
- Lubricate and install new seals. Reverse removal procedure and tighten plugs. See Figure.
RENDER: 1.0x
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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.