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 MANUALSCHEVROLET1986PICKUP C10, 5.7 M, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMFUEL INJECTION SYSTEM - 6.2L DIESELREMOVAL & INSTALLATIONTHROTTLE SHAFT SEALREMOVAL
1986 Chevrolet Pickup C10, 5.7 M, Automatic
Throttle Shaft Seal: Removal
1986 Chevrolet Pickup C10, 5.7 M, AutomaticSECTION Removal
- Disconnect negative battery cables. Remove air cleaner and intake manifold. Install Screens (J-29664-1) in cylinder heads to prevent entrance of dirt. Disconnect fuel return line and wiring from injection pump.
- Mark position of Throttle Position Switch (TPS) or vacuum regulator valve for reassembly. Remove throttle rod and return springs. Loosen fast idle solenoid and move aside. Remove throttle cable bracket.
- Install Advance Cam Adjuster (J-29601) over throttle shaft with slots of adjuster engaging pin. See Fig 1. Place spring clip over throttle shaft advance cam and tighten wing nut. Without loosening wing nut, pull adjuster off throttle shaft to provide alignment for reassembly.
- Drive pin from throttle shaft. Remove throttle shaft advance cam and fiber washer. Remove any burrs from throttle shaft after removing cam. Clean injection pump cover, upper portion of pump, throttle shaft and guide stud area. Place rags in engine valley to catch fuel. Remove injection pump cover and remove screws from cover.NOTE: DO NOT allow any dirt or foreign objects to drop into injection pump after cover is removed. Pump damage may result.
- Note position of metering valve spring over top of guide stud for reassembly reference. Note position of guide stud and washer. Remove guide stud and washer.
- Rotate min/max governor assembly up to provide clearance and remove from throttle shaft. If idle governor spring becomes disengaged from throttle block, reinstall with tightly wound coils toward throttle block.
- Remove throttle shaft and inspect. If damaged or worn, replace. Inspect throttle shaft bushings for damage, wear or leaks. If bushing replacement is required, pump must be sent to authorized repair station.
- Remove throttle shaft seals. DO NOT seals for removal. A nick on shaft will cause leakage.
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.