Leaking Oil

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Jun 3, 2010 | 09:42 AM

lharriger

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Joined: Dec 2009

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Leaking Oil

I have a 1980 F100 V8 302 5.0L with automatic transmission. I recently noticed oil leaking off the flywheel which made me think the rear main seal had gone. However, now I notice that it also leaks at the very front of the engine as well which makes me think the front main seal is bad. The main body of the engine remains dry, it is just at the ends that the leaks exist. Is it likely that both of these seals went bad simultaneously? If so then that would make me think there is some other culprit involved, but what? Or is there some other place the engine could be leaking that would cause wet ends but a dry center, the pan maybe? I can't quite find where the oil is coming from but it leaks quite a bit over the course of a 20 minute drive (1/4 quart maybe). Also it only leaks when you hit the gas.

Thanks for any suggestions.

Jun 3, 2010 | 10:03 AM

Rogue_Wulff

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Joined: Dec 2007

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From: Lost

It's possible that both the front and rear seals are leaking. The oil pan is another likely culprit, as well as the end seals under the intake.

Jun 3, 2010 | 10:20 AM

Festus Hagen

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Joined: Mar 2009

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From: Maine (NorCal Native)

Crank case vent ... PCV.

Leaky rings build crankcase pressure blowing seals if the crankcase vent is plugged.

Also bad main bearings can cause this, hows the oil pressure!

-Enjoy
fh : )_~