Why does my distributor have oil in it?

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Why does my distributor have oil in it?

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slanted87

Post subject: Why does my distributor have oil in it?

PostPosted: Thu Nov 15, 2007 7:54 am

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3 Deuce Weber

Joined: Wed Mar 22, 2006 2:24 pm
Posts: 71
Location: Licking, Missouri
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I am getting close to finishing my engine and transmission install in my 87 D150 short bed. It is a .060 over, MP 243 cam, big valve head, dual dutra duals, offenhauser intake with 390 Holley. A500 transmission. When cleaning up my distributor, I noticed engine oil in the bottom, under the weights. This is the second time this happened on the old motor. I had the thin "O" ring on there. Could excessive blowby cause this, or is it something else?

Last edited by slanted87 on Sun Nov 18, 2007 3:00 pm, edited 1 time in total.

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Joshie225

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PostPosted: Thu Nov 15, 2007 8:44 am

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Supercharged

Joined: Thu Jan 27, 2005 8:32 pm
Posts: 7834
Location: Portland-ish
Car Model: Fiat 500e

Blowby and a dirty crankcase air filter (AKA breather) will cause excessive pressure inside the engine. Couple that with a worn distributor and that's all it takes. I would also consider too high an oil level as a contributor.

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Joshua