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Old 11-11-2017, 11:25 AM   #1
Wire89's Avatar
Join Date: Jul 2017
Location: Santa Barbara
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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.
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Old 11-11-2017, 04:58 PM   #2
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Location: Western North Carolina
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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.

2001 E350 PSD w/ a bunch of stuff.
And had three other E350s...
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Old 11-22-2017, 03:25 PM   #3
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Location: Santa Barbara
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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.

SMB-less as of 02/04/2012. Our savings account is richer, but our adventures are poorer.
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Old 11-22-2017, 06:12 PM   #5
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Location: boise idaho
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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...
"understeer is when you hit the wall with the front of your car, oversteer is when you hit the wall with the rear of your car, horsepower is how hard your car hits the wall, and torque is how far your car moves the wall."
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