99 7.3 Excessive oil consumption!! - Diesel Forum - TheDieselStop.com
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99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the 99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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Old 04-24-2007, 12:30 PM   #1 (permalink)
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99 7.3 Excessive oil consumption!!

I have a 99 f250 7.3 that is a fleet truck. bought the truck a year ago everything was fine. The truck now consumes about a gallon of oil per week. Rotella 15w-40 used. No visible leaks, Turbo compressor housing and wheel are clean and dry. Also exhaust housing and downpipe are dry. Took lid off fuel filter housing, filter is good, fuel is clean, no oil. Any Ideas????
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Old 04-24-2007, 12:55 PM   #2 (permalink)
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Re: 99 7.3 Excessive oil consumption!!

Get the codes pulled, cylinder contribution test, buzz test and compression tests.

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Old 04-24-2007, 01:08 PM   #3 (permalink)
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Re: 99 7.3 Excessive oil consumption!!

Smoke...oil in exhaust pipe?
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Old 04-24-2007, 02:11 PM   #4 (permalink)
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Re: 99 7.3 Excessive oil consumption!!

No oil in the exhaust, tried to run cylinder contribution and buzz test but wouldn't work. I have communication with the truck just won't run the tests, communication problem somewhere.
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Old 04-24-2007, 02:14 PM   #5 (permalink)
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Re: 99 7.3 Excessive oil consumption!!

It has to go somewhere. If it's not leaking, not showing up in the coolant, then it's burning. More than likely you have an injector o-ring that is shot.
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Old 04-24-2007, 02:33 PM   #6 (permalink)
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Re: 99 7.3 Excessive oil consumption!!

I'll second the O Rings....
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