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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET1986STEP VAN P20, 6.2 J, AUTOMATIC, 475/M40REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMFUEL INJECTION SYSTEM - 6.2L DIESELREMOVAL & INSTALLATIONHYDRAULIC HEAD SEALREMOVAL
1986 Chevrolet Step Van P20, 6.2 J, Automatic, 475/M40
Hydraulic Head Seal: Removal
1986 Chevrolet Step Van P20, 6.2 J, Automatic, 475/M40SECTION Removal
- Remove injection pump from vehicle. Remove throttle shaft and seal. See THROTTLE SHAFT SEAL . Remove metering valve. Remove housing vent screw assembly. Remove cam advance pin hole plug and advance pin.
- Install pump in holding fixture so that rear of pump is tilted downward. Remove 2 hydraulic head locking screws. Remove hydraulic head locating screw and seal. Using a twisting motion, remove hydraulic head assembly from pump. Remove and discard "O" ring.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.