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Injector O-rings
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Junior User
Joined: Feb 2005
Posts: 92
Likes: 0
From: Michigan
Injector O-rings
The other day my truck seemed to start making oil so I am either about to be very rich or very poor. I suspect my injector o-rings are shot 219k go figure. My question is, is their any other ways fuel can get in the oil, besides a hole in a piston? Which I don't have any extra blow by when I took the cap off the filler neck and checked it. Also is their anything else that I should check or do while I have the injectors out? I ready changed my glow plugs and did the 50 cent mod this winter. Got new o-rings and 6637 kit on order with Clay last night.
Hook it, I'll pull it.
Joined: May 2007
Posts: 15,037
Likes: 4
From: Grand Lake, La.
You said your truck SEEMS to be making oil. How do you know this? Is there someone around you that has an AE to do test? Is any smoke coming out the tail pipe. Can you do a compression test on the cylinders?
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Junior User
Joined: Feb 2005
Posts: 92
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From: Michigan
It went from using a quart every 2k or so to staying full for 3k and it's a nice golden brown instead of black and smells like fuel.
Hook it, I'll pull it.
Joined: May 2007
Posts: 15,037
Likes: 4
From: Grand Lake, La.
The oil going to the injectors has a lot more pressure then the fuel going to the injectors. I would do a compression test.
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Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
A cracked injector cup will send it into the coolant.
And something wrong inside an injector will send oil into the fuel, not the other way around like is happening here.
Is there possibly a port plug under the valve cover that is on the fuel rail and it's possibly loose and leaking?
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Thread Starter
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Junior User
Joined: Feb 2005
Posts: 92
Likes: 0
From: Michigan
Ok guy's been away for awhile had some family issues crop up. Here's may plan of attack, I am going to change the oil rings and take a hard look at everything and do a compression check while I am in there, I am not sure what oil I used last so an oil test isn't going to tell me everything I would like to know so I am going to get a kit change the oil after I change the orings and send it in for testing after 2,000 miles and see where I am at. Yes the oil is under greater pressure when the engine is running but not at startup, I don't have any smoking it does seem to take more cranking to start.
