Jeep Wagoneer/Commando/Cherokee 1984-1998

Distributor Cap and Rotor


Removal & Installation

See Figures 1, 2, 3 and 4

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Fig. Fig. 1: Label the spark plug wires

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Fig. Fig. 2: Loosen the distributor retaining screws

  1. Disconnect the negative battery cable.
  3. Unplug the distributor connector from the wiring harness connector.
  5. Label, and if necessary, disconnect the spark plug wires from the distributor cap.
  7. Using a phillips head screwdriver or a 9 / 32 inch nut driver tool, loosen the distributor cap retaining screws.
  9. Lift the cap off of the distributor.
  11. Note in which direction the distributor spark pick-up is pointing, then pull the rotor off of the distributor shaft.
  13. Installation is the reverse of the removal procedures.

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Fig. Fig. 3: Remove the distributor cap

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Fig. Fig. 4: Remove the rotor from the distributor shaft


Remove the distributor cap and inspect the inside for flashover, 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 that 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, or if the tip is excessively burned or heavily scaled. If the spring terminal does not have adequate tension, replace the rotor with a new one.