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Pertronix Install. Please Help!


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In the middle of a Pertronix install. I go to put the dizzy cap back on and realize it won't go down all the way because it's hitting the rotor. Tried to adjust the black grommet down a hundred different ways, but I don't think it's going down any further. I've attached some pictures in hopes that somebody sees something I'm missing.


Bosch Distributor #: 0 231 180 008

Pertronix #: 1843





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Essentially the theory is the ring will remove the inconsistent wear in the distributor cam lobes. Essentially the distributor shaft cam is symetrical at all corners or you would be retarding the timing on two cylinders at "the two long flat sides"

just push the ring down firmly !

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After installing my Pertronix my rotor did not sit down far enough on the shaft. After a drive, when I tried to restart. it would not fire. because the rotor would turn freely in the distributor without being in position in it's slot. I had to take about 1/8" off the bottom of the rotor on a belt sander so it would sit in position on the shaft.  

Edited by peterschop
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My car had a Pertronix in it when I bought in '01. Drove fine for years. When I replaced the cap and rotor for the first time last summer, I noticed the PO had "shaved" the diameter of the rotor down a mm or two with something (Dremel maybe?). Thought it was strange and tossed it in the parts bin as a spare. Put the new one on, clipped the new cap on, and started it up. Distributor was shaking like yours and making a funny scraping noise. When I opened it back up, there was orange powder everywhere and scratches on the new rotor stem from rubbing against the Pertronix unit. "Adjusted" the new rotor like the PO had done his, and everything fine since.

'71 02 - parts car with not many parts left

'73 02 - weekend toy and money pit

'74 04 - sold in '91

'03 325iT - for trips and bad weather

'03 50cc Honda Scooter - for my 2 mile commute

'06 50cc Honda scooter - wife's commuter

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I got home this afternoon and checked the cap and rotor height, and sure enough, it was still too high. So I borrowed peteschop's idea and sanded about an 1/8" off the bottom of the rotor, and voila! it finally fit.


Also did my first timing adjustment ever. Since I was home alone, I grabbed a block of wood and laid it on its side in the footwell against the seat, Then I wedged the handle from my jack between the wood and the gas pedal until I got it to idle at a steady 1400 RPM. Turned the distributor until everything lined up with the light and I'm proud to say everything is now running smooth. It's such a rewarding feeling when everything is done and working properly, even with the small jobs.

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