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Unread 02-20-2012   #1 (permalink)
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Default where's this oil leak from?

I have been fighting a suspect oil leak from rear main (crank) seal. I changed it last year and this year. But I an mot sure its leakign from there now.
I also doubt its leaking from the oil pan.
The oil seems to be coming from higher up and fidning its way along tyhe side of the motor, accumulating at the oil pan, and also accumulating at the bottom of the plate between the bellhousing and motor.

Anything else possible other than head gasket(s)?
I cleaned out the pcv, it was crudded up but not with fresh oil around the hole at the intake.

Let me know what you think.



Thanks,
Greg
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Unread 02-20-2012   #2 (permalink)
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Leaking valve cover gasket on my Focus leaked to the point where it was dripping on the garage floor and covered with oil lots of parts that were nowhere near the valve cover. Oil is pretty sneaky stuff.
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Unread 02-20-2012   #3 (permalink)
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rear main seal bro it's sucks .did you put the new seal in dry?
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Unread 02-20-2012   #4 (permalink)
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Its not the rear main seal. The oil is coming from higher up.
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Unread 02-20-2012   #5 (permalink)
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rear intake seal.
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Unread 02-20-2012   #6 (permalink)
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thanks.

But what exactly does an intake seal have to do with oil? You have a pic of this?

The only motors I have worked on are OHV 4-cyl.

Thanks in advance for the clarification.
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Unread 02-20-2012   #7 (permalink)
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where the intake sits on the block, at the rear. the seal keeps oil from leaking out!
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Unread 02-20-2012   #8 (permalink)
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Quote:
Originally Posted by greg_mustang View Post
thanks.

But what exactly does an intake seal have to do with oil? You have a pic of this?

The only motors I have worked on are OHV 4-cyl.

Thanks in advance for the clarification.

The lower intake(or any intake on a pushrod V8 really) mates to the heads along the angled sides,and the front and rear horizontal surfaces mate to the block. Underneath the intake is a hollow valley which houses the lifters. Oil from the heads drain into this valley,then past the cam and down into the pan. Your rear intake seal is probably shot(pretty common on 5.0's),so oil is leaking all over the bellhousing and down.
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Unread 02-20-2012   #9 (permalink)
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I found a pic, I get it! thanks.
Not an issue on 4 cyl with overhead cams... so i was not used to this.
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