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Cat 3406b oil in water

Cat 3406b oil in water

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d23j227
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Have a 3406b with water in oil and oil in water. Did bottle test and there are bubbles. Any ideas of most likely cause? Thanks
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Fri, Dec 27, 2019 11:25 AM
Cdcompton
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I would say oil cooler if both fluids are mixing. While running and radiator cap off "while cool" is there any compression gases bubbling in the radiator. if oil pan can be removed do a pressure test on coolant system and see if you can tell where coolant is leaking into the oil good luck let us know
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Sat, Dec 28, 2019 2:33 AM
d23j227
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Reply to Cdcompton:
I would say oil cooler if both fluids are mixing. While running and radiator cap off "while cool" is there any compression gases bubbling in the radiator. if oil pan can be removed do a pressure test on coolant system and see if you can tell where coolant is leaking into the oil good luck let us know
Ok, will try that soon. I'll keep you posted. Running excellent no smoke, hopefully it's the cooler.
Thanks
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Sat, Dec 28, 2019 12:19 PM
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