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post #1 of 12 Old 10-05-2009, 11:47 AM Thread Starter
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oil cooler

If the oil cooler fails will the oil be pushed in the coolant or the coolant pushed into the oil? And what other symptoms will occur when it fails?

Thank you for your help
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post #2 of 12 Old 10-05-2009, 06:21 PM
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post #3 of 12 Old 10-05-2009, 07:24 PM Thread Starter
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dang. I was hoping that it would oil will go in the coolant, not coolant in the oil. Coolant in the oil will be insane to get out. When and how will this happen?

Any other signs???


Thanks
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post #4 of 12 Old 10-05-2009, 07:36 PM
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Oil in the coolant is the one you don't want. It's a pain to get out and have seen some engines get replaced because it wasn't worth it to try and clean the oil out of the cooling system. I've seen some engines run for about 4 hours with a garden hose hooked up to them flushing the system out and still have oil in block.
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post #5 of 12 Old 10-05-2009, 07:38 PM
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Originally Posted by smokersteve View Post
dang. I was hoping that it would oil will go in the coolant, not coolant in the oil. Coolant in the oil will be insane to get out. When and how will this happen?

Any other signs???


Thanks
Coolant in the oil isn't that hard to get out. Fill the crackcase with #2 diesel and try to slosh it around and then drain and repeat one more time.
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post #6 of 12 Old 10-05-2009, 07:43 PM
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You might want to try soda ash in the coolant system, It is in most powder washer detergents. In all the big commercial boilers we install that is what we put in for the first flush of the system. It cleans all the oil and crap out of the pipes and boiler from when you cut and thread the pipes. It might take a few tries in the 6.0 but its worth a shot.
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post #7 of 12 Old 10-05-2009, 08:21 PM Thread Starter
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Thanks for all the comments. very interesting.

My thought on it being better to have the oil get into the coolant (instead of th opposite) is that coolant flowing through the hpo and lifters and all that seems worse. Flushing the coolant with chem isn't as bad as trying to flush the oil with out allot of damage.

Thanks
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post #8 of 12 Old 10-05-2009, 08:48 PM
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I am a heavy duty mechanic and we had a truck come into the shop recently with oil in the coolant. It was a international truck with a DT466. Ended up that the oil cooler went and was allowing oil into the coolant. The whole cooling system was full of this slimy coolant/oil and after flushing many times with water we were still getting oily water. What we ended up doing was using water and dawn dish soap to flush out the system. It actually worked great and after 2 flushes using dawn we got it to the point that we were satisfied with how clean it was.

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post #9 of 12 Old 10-05-2009, 08:55 PM
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post #10 of 12 Old 10-06-2009, 10:44 AM Thread Starter
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Quote:
Originally Posted by 6.0DSLPWR View Post
I am a heavy duty mechanic and we had a truck come into the shop recently with oil in the coolant. It was a international truck with a DT466. Ended up that the oil cooler went and was allowing oil into the coolant. The whole cooling system was full of this slimy coolant/oil and after flushing many times with water we were still getting oily water. What we ended up doing was using water and dawn dish soap to flush out the system. It actually worked great and after 2 flushes using dawn we got it to the point that we were satisfied with how clean it was.
Thanks

Was the soap foaming???? Dish washer soap has antifoaming properties, also the one my fam uses has microscopic abrasives. Would that be a pro or con? The abrasives would help in attacking the oil but it might harm the system.

Last edited by smokersteve; 10-06-2009 at 11:09 AM.
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