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Old 12-17-2005, 08:08 PM
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302 distributor oil leak

I have a 302 that has a nagging oil leak around the base of the distributor. I have replaced the intake gaskets, timing chain cover gaskets, valve cover gaskets, and the o-ring around the distributor. I have even pulled the distributor and checked that I didnt pinch or cut the o-ring when I installed it. Any suggestions anyone?

Motor is in a 65 Comet. Eldebrock Intake. Aluminium valve covers, Stock heads, distributor, timing cover.

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Old 12-17-2005, 09:01 PM
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Whenever I get an oil leak on an old engine, it seems that there is a slight indentation where the old seal sat. When I find this, I find out what type of seal wa originally used. On old engines, rope seals were used extensivly, and you may have to use an original type seal, instead of a modern replacement. You could also take the Oring and get a slightly larger one, and slick it down with aviation sealer.
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Old 12-17-2005, 11:08 PM
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Quote:
Originally Posted by Wooky71
I have a 302 that has a nagging oil leak around the base of the distributor. I have replaced the intake gaskets, timing chain cover gaskets, valve cover gaskets, and the o-ring around the distributor. I have even pulled the distributor and checked that I didnt pinch or cut the o-ring when I installed it. Any suggestions anyone?

Motor is in a 65 Comet. Eldebrock Intake. Aluminium valve covers, Stock heads, distributor, timing cover.
Are you sure the source of the leak is the distributor?
How does changing all the gaskets relate to the distributor?
Surely you have a vented oil cap and a PCV on the engine so there is no pressure in the crankcase.
This is an extremely rare place to have an oil leak if there is no pressure inside the crankcase pushing oil out.

Like he said, a fatter O-ring might be what you need. Or you could put a dab of Aviation Permatex under the dist flange. But oil should not be getting above the o-ring.
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Old 12-18-2005, 08:32 AM
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re-torque the intake bolts,
it's way more likely that you don't have a (good silicone) seal across the front block top to bottem front of the intake manifold behind the dist

clean the whole area with a little carb cleaner, sprinkle some baby powder or similar, check to pin point the leak stain source

do you know the history of the block and heads (milled, decked, original?)
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Old 12-19-2005, 10:08 PM
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I dont know the history of the heads or block. The guy I purchased the car from just dropped it off at a mechanic and picked it up when he was done. He actully told me it was a 289 but as soon as I started checking numbers it was a 302. I have never heard of the baby powder trick. I will try that first.
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