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 MANUALSCHEVROLET1983STEP VAN P30, 5.7 M, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMFUEL INJECTION SYSTEM - DIESELREMOVAL & INSTALLATIONINJECTION PUMP SEAL REPLACEMENTHYDRAULIC HEAD SEAL
1983 Chevrolet Step Van P30, 5.7 M, Standard
Hydraulic Head Seal
1983 Chevrolet Step Van P30, 5.7 M, StandardSECTION Hydraulic Head Seal
- Remove throttle shaft and seals as previously described. Remove metering valve. Remove housing vent screw assembly. Remove advance pin hole plug and advance pin.
- Install pump in holding fixture so that rear of pump is tilted downward. Remove hydraulic head locating screw. Remove 2 hydraulic head locking screws and discard seals.
- Using a twisting motion, remove hydraulic head from pump assembly. Remove and discard "O" ring seal.
- Lubricate and install new seal. Install hydraulic head into pump assembly. Lubricate and install 2 locking screw seals. Install locating screw. Install and tighten locking screws.
- Install advance pin, advance pin seal and advance pin hole plug. Position pump so cover opening is up and install metering valve. Install throttle shaft, seals and pump cover.
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.