Oil Leak. Rear Main? - Ford Powerstroke Diesel Forum
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Old 03-20-2009, 04:36 PM
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Oil Leak. Rear Main?

So I washed my truck yesterday and when i got home I now have a severe oil leak coming from that weird nipple thing that is where the motor and transmission connect. it only leaks when the truck is running, and it leaks very bad. I'm thinking rear main seal...any suggestions or ideas? thanks in advance.

So far I've drained my oil to a mid dipstick level and still having same issue.
UPDATEkay so I looked around and there is fresh oil in the valley...

Last edited by Powerstroke W/smoke; 03-20-2009 at 05:29 PM.
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Old 03-20-2009, 04:47 PM
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What weird nipple?

9 times out of 10 if there is oil coming from the back of the engine it is coming from the turbo pedistal. Get an inspection mirror and take a look back there!
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Old 03-20-2009, 04:47 PM
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Oil Leak

Did you pressure wash the engine too?

It isn't all that common for a rear main leak on a 7.3. Have a look in the valley on top of the engine. There is a drain hole at the rear of the valley that lets any leak from the top of the engine drain down the back of the block and mimick a rear main leak.

I would bet the leak is up top somewhere, maybe a turbo pedestal o-ring or a leaking HPOP.

Let us know what you find, and we can go from there.
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Old 03-20-2009, 05:29 PM
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okay so I looked around and there is fresh oil in the valley...
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Old 03-20-2009, 05:33 PM
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MOD! Can a mod please change the title from what it is now to "Oil Leak From Vally" please? thanks if you can
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Old 03-20-2009, 05:44 PM
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Have you determined if it is comming from the turbo or the HPOP?
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Old 03-20-2009, 05:50 PM
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Quote:
Originally Posted by RRonning1984 View Post
Have you determined if it is comming from the turbo or the HPOP?
negative. i'm still looking around the engine area to find the cause, but there is so many things in the way.
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Old 03-20-2009, 05:53 PM
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My 02 had a similar problem with the previous owner and it turned out to be the High side oil line. I'm not to sure what that means but it's what the paper work says.
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Old 03-20-2009, 06:02 PM
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Update: so i removed the cover for the fuel filter and the thing under that looks as if to be the cause of the oil.. not 100% sure yet. I'm familiar with the 6.0 motor because of catastrophic motor failure but not so much with the 7.3, so is what i'm describing my HPOP?
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  #10  
Old 03-20-2009, 06:06 PM
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Are you talking about the big plastic cover or the actual fuel filter lid!
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