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 OVERHAULDISASSEMBLY PROCEDURE
1998 Chevrolet Express 1 Ton Van V8-5.7L VIN R
Disassembly Procedure
1998 Chevrolet Express 1 Ton Van V8-5.7L VIN RSECTION Disassembly Procedure
DISTRIBUTOR OVERHAUL
NOTICE: Refer to Distributor Driven Gear Can Be Installed in Multiple Positions in Cautions and Notices.
1. Remove the two screws that hold the distributor cap to the housing.
2. Discard the screws.
3. Remove the distributor cap from the housing.
4. Align white paint mark on the bottom stem of the distributor, and the pre-drilled indent hole in the bottom of the gear (3).
5. With the gear in this position, the rotor segment should be positioned as shown for a V6 engine (1) or V8 engine (2) If not, replace the distributor.
6. Remove the two screws from the rotor.
7. Remove the rotor.
8. Note the locating holes that the rotor was removed from:
^ (1) is the rotor screw holes.
^ (2) is the rotor locator pin holes.
9. Remove the two screws that hold the Camshaft Position (CMP) sensor.
10. Discard the screws.
11. Line up the square-cut hole in the vane wheel with the CMP sensor.
12. Remove the CMP sensor.
13. Note the dimple located below the roll pin hole on one side of the gear. The dimple will be used to properly orient the gear onto the shaft during reassembly.
CAUTION: Refer to Safety Glasses Caution in Cautions and Notices.
14. Support the distributor drive gear in a V-block or similar fixture.
15. Drive out the roll pin with a suitable punch.
16. Remove the driven gear from the distributor shaft.
17. Remove the round washer.
18. Remove the tang washer.
19. Remove the round washer, if equipped (1), 7.4L engine only.
20. Remove the old oil seal.
NOTICE: Refer to Distributor Driven Gear Can Be Installed in Multiple Positions in Cautions and Notices.
1. Remove the two screws that hold the distributor cap to the housing.
2. Discard the screws.
3. Remove the distributor cap from the housing.
4. Align white paint mark on the bottom stem of the distributor, and the pre-drilled indent hole in the bottom of the gear (3).
5. With the gear in this position, the rotor segment should be positioned as shown for a V6 engine (1) or V8 engine (2) If not, replace the distributor.
6. Remove the two screws from the rotor.
7. Remove the rotor.
8. Note the locating holes that the rotor was removed from:
^ (1) is the rotor screw holes.
^ (2) is the rotor locator pin holes.
9. Remove the two screws that hold the Camshaft Position (CMP) sensor.
10. Discard the screws.
11. Line up the square-cut hole in the vane wheel with the CMP sensor.
12. Remove the CMP sensor.
13. Note the dimple located below the roll pin hole on one side of the gear. The dimple will be used to properly orient the gear onto the shaft during reassembly.
CAUTION: Refer to Safety Glasses Caution in Cautions and Notices.
14. Support the distributor drive gear in a V-block or similar fixture.
15. Drive out the roll pin with a suitable punch.
16. Remove the driven gear from the distributor shaft.
17. Remove the round washer.
18. Remove the tang washer.
19. Remove the round washer, if equipped (1), 7.4L engine only.
20. Remove the old oil seal.
RENDER: 1.0x
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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.