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 MANUALSCHEVROLET1998EXPRESS 1 TON VAN V8-5.7L VIN RREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMDISTRIBUTORSERVICE AND REPAIRDISTRIBUTOR OVERHAULASSEMBLY PROCEDURE
1998 Chevrolet Express 1 Ton Van V8-5.7L VIN R
Assembly Procedure
1998 Chevrolet Express 1 Ton Van V8-5.7L VIN RSECTION Assembly Procedure
DISTRIBUTOR OVERHAUL
1. Line up the square-cut hole in the vane wheel for the camshaft position (CMP) sensor.
2. Insert the sensor into the housing.
NOTICE: Refer to Fastener Notice in Cautions and Notices.
3. Install two NEW screws for the camshaft position (CMP) sensor.
Tighten
Tighten the screws to 2.2 Nm (20 lb in).
4. Identify the correct rotor mounting position.
^ (1) is the rotor screw holes.
^ (2) is the rotor locator pin holes.
5. Install the distributor rotor according to the index marks.
6. Install two rotor hold down screws.
Tighten
Tighten the screws to 1.9 Nm (17 lb in).
NOTICE: Refer to Distributor Driven Gear Can Be Installed in Multiple Positions in Cautions and Notices.
7. Install the round washer (1), 7.4L engine only.
8. Install the tang washer over the bottom of the distributor shaft.
9. Install the round washer.
10. Install the driven gear according to the index marks.
11. Align the rotor segment as shown for a V6 engine (1) or V8 engine (2).
12. Install the gear and align white paint mark on the bottom stem of the distributor, and the pre-drilled indent hole in the bottom of the gear (3).
13. Check to see If the driven gear is installed incorrectly, the dimple will be approximately 180 degrees opposite the rotor segment when it is installed in the distributor.
CAUTION: Refer to Safety Glasses Caution in Cautions and Notices.
14. Support the distributor drive gear in a V-block or similar fixture.
15. Install the roll pin with a suitable punch and hammer in order to hold the driven gear in the correct position.
16. Install the distributor cap.
17. Install two NEW distributor cap screws.
Tighten
Tighten the screws to 2.4 Nm (21 lb in).
18. Install the new oil seal under the mounting flange of the distributor base.
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.