'99 7.3 losing oil - Ford Powerstroke Diesel Forum
 
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post #1 of 10 Old 08-27-2011, 07:32 AM Thread Starter
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'99 7.3 losing oil

My dad has a 1999 7.3 that he pulls his 5th wheel camper with. It has recently started losing oil, but there are no leaks to be found and the exhaust is clean. He has taken it to a local diesel mechanic, a very well known, good one, and it has him stumped so far.
They serviced it, checked a few things and he told dad to take it on a short run so he went 100 miles and it lost 3 qts of oil.
Any ideas?
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post #2 of 10 Old 08-27-2011, 08:28 AM
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No oil on the fron or back of the engine? None in the valley?

How does the exhaust smoke look? Color?
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post #3 of 10 Old 08-27-2011, 09:33 AM Thread Starter
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no oil anywhere.

exhaust has no color. His 5th wheel camper is white, I would think it would be getting dirty around the exhaust, but its not.

He's always been meticulous about checking oil in everything, as most farmers are. He said it never used any oil between changes and then all of a sudden it started to.
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post #4 of 10 Old 08-27-2011, 05:16 PM
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Injector o rings , I lost 2 gals in 100 miles.

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post #5 of 10 Old 08-27-2011, 10:18 PM
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could be his oil cooler letting oil into his antifreeze

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post #6 of 10 Old 08-27-2011, 11:23 PM
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im going with injector orings as well..... its a diesel.. it'll run on oil easy lol.
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post #7 of 10 Old 08-28-2011, 04:45 AM
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Quote:
Originally Posted by Dietoremain View Post
im going with injector orings as well..... its a diesel.. it'll run on oil easy lol.
VERY true.... but I would think you would notice blue smoke from burning the oil.
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post #8 of 10 Old 08-28-2011, 06:14 AM
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check the fuel filter for oil. If it has black sludge, you need a injector ring job

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post #9 of 10 Old 09-12-2011, 01:17 PM Thread Starter
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thanks, guys. I'll let him know.
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post #10 of 10 Old 09-12-2011, 01:24 PM
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Yeah if theirs oil in the bottom of the filter bowl when you take the filter out then you need o-rings, or at least thats what I'm told. And it wont make blue smoke because its atomized and burns clean.

Allen
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