Remove the distributor cap and inspect the inside for flash over, cracking of the carbon button, lack of spring tension on the carbon button, cracking of the cap, and burned, worn terminals. Also check for broken distributer cap towers. If any of these conditions are present, the distributor cap and/or cables should be replaced.
When replacing the distributor cap, transfer cables from the original cap to the new cap one at a time. Ensure each cable is installed into the corresponding tower of the new cap. Fully seat the wires into the towers. If necessary, refer to the appropriate engine firing order diagram.
Light scaling of the terminals can be cleaned with a sharp knife. If the terminals are heavily scaled, replace the distributor cap.
A cap that is greasy, dirty or has a powder-like substance on the inside should be cleaned with a solution of warm water and mild detergent. Scrub the cap with a soft brush. Thoroughly rinse the cap and dry it with a clean soft cloth.
Replace the rotor with a new one if it is cracked, the tip is excessively burned or heavily scaled. If the spring terminal does not have adequate tension, replace the rotor with a new one.
REMOVAL & INSTALLATION
Only the 3.0L engines (except for the 3.0L engines in the Premier and Monacos manufactured after October of 1991) are equipped with a distributor in the conventional sense. The 3.3L, 3.8L and late Premier and Monaco 3.0L engines utilize crankshaft and camshaft position sensors to determine spark timing, along with many other engine functions.Except Premier and Monaco
See Figures 1 and 2
- Unplug the distributor connector from the wiring harness connector.
- Loosen the distributor cap retaining screws.
- Label and disconnect the spark plug cables from the distributor cap.
- Lift the cap off of the distributor.
- Note in which direction the distributor spark pick-up is pointing, then pull the rotor off of the distributor shaft.
- Push the new rotor onto the distributor shaft. Make certain it is pointing in the same direction.
- Set the distributor cap back onto the distributor.
- Tighten the distributor cap retaining screws until they are snug.
- Connect the spark plug cables back onto the distributor cap.
- Plug the distributor connector to the wiring harness connector.
Premier and Monaco
See Figures 3 and 4
The distributor cap, rotor and dust shield assembly is located at the front of the left-hand cylinder head.
- Remove the cover over the spark plug wires.
- Label and disconnect the spark plug cables from the distributor nipples.
- Loosen and remove the three distributor cap mounting screws.
- Remove the distributor cap from the cylinder head.
- Remove the three rotor retaining screws, then pull the rotor off of the camshaft end.
- Pull the dust shield out of the mounting hole.
- Transfer the spark plug wires to the new distributor cap.
- Install the dust cover into the hole, then mount the new rotor with the three mounting screws.
- Install the distributor cap and secure in place with the three mounting screws.
- Make certain that the spark plug cables are securely attached to the cap. Install the spark plug cable cover onto the distributor.