GM 94845172 DISTRIBUT

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To check the pick-up coil, one has to take out the distributor and then the rotor to do it. Then open the tap module by pulling and taking out the two screws of this module, then move the module aside and remove the connection from the '8' and 'C' terminals, then connections from the 'W' and 'G' terminals. Gently expand the roll pin from the drive gear and finally, the gear, shim and the tanged washer will have to be withdrawn from the distributor shaft. Before pulling the shaft out of the housing, make sure that it is not caked, and remove the washer from the upper end of the distributor housing. Slide off the retaining ring for removal of the pick-up coil and pole piece; this can be done after employing the screw driver to pry out the 'C' clip. The vacuum unit can be detached by unscrewing two screws, then you can take out lock ring, pick-up coil retainer, shim and felt washer. Ground the capacitor lead and remove the capacitor with one bolt, then, the wiring harness from the distributor housing. Wipe all parts with a cloth that has a solvent on it and look for any signs of deterioration or damage and replace when needed. In assembly, there should be the vacuum unit that should be placed at the housing and fixed with two screws. Install the felt washer over the lubricant reservoir on top of the housing then the shim should be placed on top of the felt washer. Place the pick-up coil and pole-piece assembly in place and secure it back into the vacuum advance arm and place the retaining ring on. The washer must be fitted into the top of the housing while the distributor shaft should be fitted and then measure equal distances to the pole piece projections. Fit in the tanged washer, shim and drive gear and make the gear coincide with new roll pin. Finally screw the capacitor halfway in and snap the connector to the 'B' and 'C' terminals of the module and the tab must be at the top. 2 Insert the module into the base with silicone grease applied at the base of the module in order to make a good heat conduction and use two screws. Insert the wiring harness into the housing with the grommet added to the housing notch, then bring the pink terminated wire to the capacitor stud and connect it with the screw for the capacitor while tightening the black wire terminated to the capacitor mounting screw. Fix the white wire to module 'W' and the green wire to 'G' of the pick-up coil. Last, place the advance weights, weight retainer (dimple down), and springs and fasten the rotor with two screws so that the side notch of the rotor fits the tab situated on the base of the cam weight, and then the distributor.

Ensure the shaft is not burred.

Remove the distributor hold-down bolt and clamp, then pull the distributor straight up, taking care not to disturb the intermediate driveshaft. Avoid turning the engine while the distributor is removed to maintain alignment marks.