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 MANUALSCHEVROLET1998CHEVY VAN G2500, VAN CARGO, 5.0 MREPAIR AND DIAGNOSIS (SINGLE PAGE)TRANSMISSIONAUTOMATIC TRANSAUTOMATIC TRANSMISSION OVERHAUL - 4L80-ETRANSMISSION REASSEMBLYOIL PUMP ASSEMBLY
1998 Chevrolet Chevy Van G2500, Van Cargo, 5.0 M
Oil Pump Assembly
1998 Chevrolet Chevy Van G2500, Van Cargo, 5.0 MSECTION Oil Pump Assembly
- Install Locating Pin (J-25025-1) at 12 o'clock position. Install oil pump cover gasket. See Fig 1. Install selective thrust washer. Using Handle (J-37789), install oil pump assembly. See Fig 2. Ensure turbine shaft spins free. Tighten oil pump bolts.
- Using dial indicator, check front unit end play. See Figure. Front unit end play should be .004-.022" (.10-.56 mm). If front unit end play is not correct, select proper size thrust washer. See FRONT END PLAY THRUST WASHER IDENTIFICATION table. If necessary, remove oil pump assembly to change selective thrust washer.
FRONT END PLAY THRUST WASHER IDENTIFICATION
| Identification | Thickness |
|---|---|
| Blue | .057-.061" (1.45-1.55 mm) |
| Red | .073-.077" (1.85-1.96 mm) |
| Brown | .089-.093" (2.26-2.36 mm) |
| Green | .105-.109" (2.67-2.77 mm) |
| Plain | .121-.125" (3.07-3.18 mm) |
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.