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 MANUALSCHEVROLET1991CAPRICE WAGON RWD V8-350 5.7LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMDISTRIBUTORSERVICE AND REPAIRDISTRIBUTOR REMOVAL & INSTALLATION
1991 Chevrolet Caprice Wagon RWD V8-350 5.7L
Distributor Removal & Installation
1991 Chevrolet Caprice Wagon RWD V8-350 5.7LSECTION Distributor Removal & Installation
1. Disconnect the ignition switch battery feed wire and tachometer lead if equipped from distributor cap. Also release the coil connectors from the cap. (DO NOT use a screwdriver or tool to release the locking tabs).
2. Remove the distributor cap by turning four latches counterclockwise. Move cap out of the way.
3. Remove the four terminal ECM harness from distributor.
4. If necessary, remove secondary wires from cap, release wiring harness latches and remove wiring harness retainer. The spark plug wire numbers are indicated on the retainer.
5. Remove the distributor clamp screw and hold-down clamp.
6. Note position of rotor, then pull distributor up until rotor just stops turning counterclockwise and again note position of rotor.
7. Remove distributor.
NOTE: To ensure correct timing of the distributor, the distributor must be installed with the rotor correctly positioned as noted. If the engine was accidentally cranked after the distributor was removed, the following procedure can be used for installing.
a. Remove the number 1 spark plug.
b. Place finger over the number 1 spark plug hole and crank engine slowly until compression is felt.
c. Align timing mark on pulley to "0" on engine timing indicator.
d. Turn rotor to point between number 1 and number 8 spark plug towers on the distributor cap.
8. Install the distributor.
9. Install distributor hold-down clamp and distributor clamp bolt. Tighten clamp bolt to 36 Nm (27 lb. ft.).
10. Install rotor in the same position at which it was removed.
11. If removed, install the secondary wires from cap, wiring harness latches and wiring harness retainer.
12. Connect four terminal ECM harness to distributor.
13. Connect ignition feed wire.
14. Install distributor cap and spark plug wires.
15. Check engine timing.
2. Remove the distributor cap by turning four latches counterclockwise. Move cap out of the way.
3. Remove the four terminal ECM harness from distributor.
Spark Plug Wire Holder Release:
4. If necessary, remove secondary wires from cap, release wiring harness latches and remove wiring harness retainer. The spark plug wire numbers are indicated on the retainer.
5. Remove the distributor clamp screw and hold-down clamp.
6. Note position of rotor, then pull distributor up until rotor just stops turning counterclockwise and again note position of rotor.
7. Remove distributor.
NOTE: To ensure correct timing of the distributor, the distributor must be installed with the rotor correctly positioned as noted. If the engine was accidentally cranked after the distributor was removed, the following procedure can be used for installing.
a. Remove the number 1 spark plug.
b. Place finger over the number 1 spark plug hole and crank engine slowly until compression is felt.
c. Align timing mark on pulley to "0" on engine timing indicator.
d. Turn rotor to point between number 1 and number 8 spark plug towers on the distributor cap.
8. Install the distributor.
9. Install distributor hold-down clamp and distributor clamp bolt. Tighten clamp bolt to 36 Nm (27 lb. ft.).
10. Install rotor in the same position at which it was removed.
11. If removed, install the secondary wires from cap, wiring harness latches and wiring harness retainer.
12. Connect four terminal ECM harness to distributor.
13. Connect ignition feed wire.
14. Install distributor cap and spark plug wires.
15. Check engine timing.
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.