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Join Date: Mar 2010
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No spark/Damage distributor rotor

HelloÖ Iíve a BMW 325es (1986 2.7), Iíve it, since 1990, lately, itís been giving me some problems starting up. In the past 2 months, it just wonít start, its has burned me 2 distributor rotors. I change the Distributor cap, a few months ago (it was burned) and the rotor as well (also damaged), I donít even remember when was the last time my car damaged that (was a long time ago); when I that I went ahead and also replace the timing belt (and all in there, water pump, etc.) when I did that, I change the distributor, the rotor and the spark plug wires (even the spark plugs). It was working fine, until 2 months ago (approximately), it started giving me hard time to start, on both times when I checked, the rotor was burned(and electricity was not reaching the spark plugs), the cap is fine, still looks brand new. Any ideas why is burning the rotor?

Thanks!
Old 03-15-2010, 05:36 AM
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Burned...what do you mean? Are you getting to much voltage from the coil? Have you checked the coil??
Black on the rotor contacts or on the distributor contacts (each contact)?
What about the big wire from coil to distributor?

Are you getting spark from the big wire? Is the coil old?

I have not played with this model for a while??
Jon
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Old 03-15-2010, 10:12 AM
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Hi,

Do you have the black plastic cover on the dist. cap? It was found by BMW that the plastic actually caused the spark to "wander" and the rotor was the first to go out. Sound crazy but it was a problem. Remove the cover if it is still there, this might help.

Thanks, Rick
Old 03-21-2010, 10:42 PM
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I was wondering about that cap. The manual shows it as a moisture barrier and mine has some sort of grounding wire on it. I've never seen anything like it.
Old 08-16-2010, 11:39 AM
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Removing the black cover will do nothing accept make your ignition prone to moisture. Did you get the cap and rotor from your corner parts store? The voltage coming from the coil will burn right through a cheep rotor. If you replaced the coil with a high output wrong resisted one you will have problems also with burning out the resister between the center and tip of the rotor.

Ditto with a cheep cap.
Old 08-16-2010, 12:43 PM
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distributor , rotor , spark

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