99 7.3L oil in water - Ford Powerstroke Diesel Forum
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post #1 of 11 Old 08-22-2010, 06:42 PM Thread Starter
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99 7.3L oil in water

i have a 99 7.3L 3/4 ton super duty with 210,000 and i started getting oil in the overflow reservior and it has a slight vibration when its cold. No water in oil either. got any suggestions?
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post #2 of 11 Old 08-22-2010, 09:09 PM
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are you sure its oil? not diesel fuel?
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post #3 of 11 Old 08-22-2010, 09:20 PM
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oil cooler o rings

Trucks and parts............
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post #4 of 11 Old 08-22-2010, 09:46 PM
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oil cooler o rings mine went bad @200,000
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post #5 of 11 Old 08-22-2010, 10:08 PM
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oil cooler its the only way to get oil in your coolant

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post #6 of 11 Old 08-26-2010, 05:54 PM Thread Starter
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Quote:
Originally Posted by Dietoremain View Post
are you sure its oil? not diesel fuel?
positive! Its black and merky like oil.
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post #7 of 11 Old 08-26-2010, 05:56 PM
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X3 on oil cooler o rings. Make sure you flush out the cooling system a few times with dawn dish soap to clean out that oil.

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post #8 of 11 Old 08-26-2010, 06:02 PM Thread Starter
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Quote:
Originally Posted by dieseldan2005 View Post
X3 on oil cooler o rings. Make sure you flush out the cooling system a few times with dawn dish soap to clean out that oil.
What is x3 o-rings? I had a ford diesel tech tell me to use simple green cuz you don't want something that suds real bad
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post #9 of 11 Old 08-26-2010, 06:44 PM
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I meant that times 3, the other guys that had said oil cooler o rings. On the soap note, the dawn is what i have heard to use, simple green should work well too. You could also try cascade too. I just did some looking around and the cascade seems to foam way less.

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post #10 of 11 Old 09-29-2010, 07:50 AM
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I have been fighting this problem for months. We have replaced every external part that could possible cause the problem (oil cooler, timing cover gasket, etc.) finally the other day as I was going down the road the engine temp spiked. went from normal operating temp to pegged in about a minute. any thoughts
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