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Old 11-11-2017, 11:25 AM   #1
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High flow engine oil leak at start up...

Hi All...Went to start up my '02 E350 7.3L this morning for a short weekend trip and during warmup discovered a major oil flow. It happened somewhere within 3-5 minutes after starting the engine, while I was milling around getting things ready for the drive. Shut it down and inspected the underside, nothing visible. I pulled the doghouse and found oil still flowing across the valve cover, though the leak originates forward of the air manifold in the photo, beyond where I can see. Couldn't see anything from the hood side either. It does not appear that anything blew off, no splatter. About ten minutes after shutting down I could hear a faint burbling sound. Anyone know what happened?

The only recent work done was an oil and filters changes. It was on a 600+ mile trip to the desert after that. I did start it very briefly yesterday in order to back it into a parking space. No recent indicators on the dash beyond a random battery light flicker.
thanks.
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Old 11-11-2017, 04:58 PM   #2
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Is there oil in the valley too?
I'd start with the (I think ) 11/16th plugs on the top of each head, there should be four per side. A few of mine had backed out a while back that caused a nasty oil leak.
Then if there is oil in the valley, I'd take a look at the back of the HPOP to see .mine also developed a massive leak from the quick disconnect fittings.
I tend to say the hardest part of all this is finding the leaks vs fixing the problem.
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Old 11-22-2017, 03:25 PM   #3
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So I finally got this sorted and thought I’d share what happened....seemed a rather unique mishap. The drivers side high pressure oil line had been sitting against an engine hoist point. Over 100k miles plus the contact had worn through the plastic sheath , through the stainless braiding, and through the rubber. On the next start it just gave out.
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Old 11-22-2017, 05:59 PM   #4
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Thanks for posting the cause of the issue. Too many times people post the problem, but not the root cause.


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Old 11-22-2017, 06:12 PM   #5
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^^^ agreed. Been running into that a lot lately.

My mechanic caught this exact issue with my 03 trying to diagnose a different leak. He said it's pretty common. I have no idea how mine wasn't leaking. It looked like you could put your fingernail through it...
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