HELP Can't find how oil is getting into cylinder - Ford Powerstroke Diesel Forum
 
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post #1 of 8 Old 03-06-2008, 04:17 PM Thread Starter
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HELP Can't find how oil is getting into cylinder

Hello all, I've been pulling my hair out for the last couple of days about this problem and was hoping the good folks here could help.

I've just completed a rebuild on the engine for my '01 and with it still on the engine stand decided to crank it over to prime the oil systems. After cranking it long enough to fill the high pressure oil gallerys oil began to squirt out of the #7 exhaust port and mist out the glow plug hole. I shone a light into the exhaust port and was able to clearly see the oil come from around the open valve out of the cylinder. I saw no evidence that the oil was coming from the valve guide area nor from any visible crack.

What I've tried so far in my diagnosis:

1.) Swapped #7 injector with the one from cylinder #5 - oil loss stayed on #7 with no issues noted on #5.

2.) Replaced new #7 injector cup with another new cup from International - no change in the oil loss from #7.

3.) Removed high pressure oil and supply from passenger side cylinder head and cranked over engine - No more oil loss from #7.

So I'm certain that it's high pressure oil that's coming from the cylinder but have no idea where it may be coming from. Any ideas or anyone run into anything similar?

Thanks in advance,
John
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post #2 of 8 Old 03-07-2008, 12:19 PM Thread Starter
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Can a moderator move this to Engine 911 please. Trying to get this back in my truck ASAP. Thank You!
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post #3 of 8 Old 03-07-2008, 12:31 PM
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Wish I could help but Im not sure

2002 F-250 4x4 EC, SRW, SB
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post #4 of 8 Old 03-07-2008, 01:03 PM
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were the heads sent to a machine shop to be checked and worked?

Keith in Alaska (lovin it)
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post #5 of 8 Old 03-07-2008, 01:48 PM Thread Starter
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Yes, the heads had a valve job, cleaned and check for cracks and I installed the injector cups.
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post #6 of 8 Old 03-08-2008, 04:02 PM Thread Starter
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Well, I believe I have solved the mystery. I think the upper injector hold down shoulder bolt was bent enough to **** the injector in the bore allowing high pressure oil to leak into the cylinder. I was removing the head in order to turn the engine over with the high pressure line attached in order to visually see the leak. Upon removing the #7 injector hold down upper bolt impact wobbled. Checked the bold on a flat surface threads bent in relation to shoulder. Ordered all new injector bolts, reassembled and again no high pressure oil leaking into the cylinder. Also for good measure I pulled the fuel rail plugs and checked for high pressure oil leaking. No oil leaks. Hoping to have the Truck done to drive to Bristol for the race next weekend. Will keep everybody posted.
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post #7 of 8 Old 03-08-2008, 04:14 PM
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Nice.. Good Update hope everything else goes smooth for you..
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post #8 of 8 Old 03-24-2008, 07:28 PM Thread Starter
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Well back from Bristol All went great, 17.3 mpg @ 70 mph. No oil loss. SO Glad to be back in the truck. First oil change tomorrow since rebuild 1,500 miles.
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