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Distributor Wear?

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Red Raider

01-31-2000 10:35:22

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Engine runs rough at high rpm, smoother at low to moderate rpm, but doesn't purr yet. I've noticed a little play in the distrbutor shaft. Would this cause the problem? I set the timing by the book.

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Claus

01-31-2000 11:36:01

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Re: Distributor Wear? in reply to Red Raider, 01-31-2000 10:35:22

Yes, play in the distributor shaft can cause erratic running. When setting the distributor point gap it is recommended that one check the gap on all four lobes while applying pressure perpendicular to the shaft. If the point gap varies, then so will the dwell angle. This is not a good thing.
Happy Motoring
Claus

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Red Raider

01-31-2000 20:18:00

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Re: Re: Distributor Wear? in reply to Claus, 01-31-2000 11:36:01

I can tell from a close inspection of the bushing that it is certainly worn on one side of the breaker arm, resulting in constant point gap variation. This would explain why the engine would have an occasional periodic miss. I understand there are two bushings to replace. Can these be reamed and replaced easily?

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Claus

02-01-2000 04:06:01

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Re: Re: Re: Distributor Wear? in reply to Red Raider, 01-31-2000 20:18:00

You did not specify, whether you have a fron mount or side mount distributor... It is best to have a Bushing Driver Kit.. These are available from Harbor Freight rather cheaply....You may not have to ream the bushings once installed. When I replaced my bushings on my front mount, I used the distributor shaft as a reamer...
Happy Motoring
Claus

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01-31-2000 11:30:55

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Re: Distributor Wear? in reply to Red Raider, 01-31-2000 10:35:22

There have been several posts about eccentric cam lobes and worn distributor shaft bushings causing rough performance. A sticking centrifugal advance can also cause rough higher rpm performance because the spark is not advancing.

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