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post #1 of 3 (permalink) Old 02-16-05, 09:04 PM Thread Starter
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Replacing a matching distributor

I have an 83 Lincoln Towncar with 170,000 miles. I am about to replace my distributor (this one is simple, with no vacuum, no wires). The original one is completely worn, and I can giggle it back and forth! Before I pulled out the original, I marked the side of the distributor cap so I can match the location of the rotor when replacing the distributor. I have a complete match replacement for the distributor, but when I am going to replace the distributor, the rotor does not line up in the same location as the previous distributor. It seems to be advanced a mere 5%. Since the original was all worn out and loose, is this 5% advancement expected? Why wouldn't the replacement distributor align the rotor in the same place as the original? What problems will I run into if I leave the rotor in the 5% advanced location? I need to get this back in right away and get the car running again quickly.

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post #2 of 3 (permalink) Old 02-17-05, 12:49 AM
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Re: Replacing a matching distributor

The relationship between the distributor body and the rotor cap are the only important settings; the rotation of the distributor in the block will advance/retard the timing.

Either rotate the distributor the 5 degrees (may not be able to if distributor body fouls on manifold etc) or remove it and rotate shaft so is meshs on the next tooth around.

With crankshaft on TDC (ready to fire ie not exhaust stroke) the rotor should be pointing at the Number 1 lead on distributor cap. Once she is running make sure you set timing with timing light.
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post #3 of 3 (permalink) Old 02-17-05, 03:48 PM Thread Starter
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Re: Replacing a matching distributor

Update: I replaced the distributor by placing the rotor at 5 degrees advanced from the original mark. There was no issue with the oil pump. The starting problem I was working on was not related to the distributor, but it needed to be replaced. The car is running after I replaced the EEC relay, and it is not pinging. Thanks for the replies.

- Rob
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