Replacing the distributor cap and rotor
The distributor cap is secured to the housing with screws. With the ignition off, loosen or remove the screws and remove the cap. Inspect the inside of the cap for cracks (breakages), signs of burning, or wear on the wire terminals. Replace the cap if there is any sign of anything abnormal. Minor wear on the terminals can be considered normal.
Remove the ignition unit rotor by lifting it straight off the shaft. 1989-91 Prelude vehicles with fuel injection use a screw to hold the rotor on the shaft; loosen or remove the screw before removing the rotor. Inspect the rotor for any signs of wear; it is not recommended to align or grind the rotor except in emergency circumstances.
Before installation, align the rotor and shaft; both have flat sides - to ensure correct placement. Press the rotor onto the shaft. Install and tighten the screw if it was removed. Carefully install the distributor insulation or seal and cover; tighten the screws slightly.
Reluctance
1. Disconnect the negative battery terminal.
2. Remove the distributor cap and rotor.
3. Use two small flat tools to gently and evenly remove the magnetic resistance from the shaft. Cover the distributor housing with a rag or cloth. Take care not to damage the stator or other components.
4. Position the magnetic resistance with the serial number facing up. Install it by pushing it firmly into the distributor shaft.
5. Install the round key with its slot facing away from the distributor shaft.
Master winding
1. Remove the distributor cap, rotor and magnetic resistance.
2. Disconnect the electrical connector from the coil.
3. Remove the screw holding the winding; remove the assembly.
4. Install in reverse order. Adjust the air gap if necessary.
Breaker module
The externally mounted breaker module is removed directly. All work is performed with the ignition off. Removal of the Toyo Denso breaker module mounted on the side of the distributor requires the removal of two bolts and harness clamps. The breaker module is attached directly to the distributor. Before installation, lubricate the contacts of the module with silicone grease.
An internally mounted breaker module, as is done for example in Hitachi distributors, requires the removal of the distributor cap, rotor and magnetic resistance. The module can be removed after removing the retaining screws. Note the position of the retaining screws (but it is better to mark them!); they are made of diamagnetic material and must be installed in their original (starting) position.
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