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Wayne, Journeyman
Category: Medium and Heavy Trucks
Satisfied Customers: 9660
Experience:  worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling
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Have a 2009 KW tractor with cummins ISX and I have oil in

Customer Question

Have a 2009 KW tractor with cummins ISX and I have oil in the coolant. Unit has 400k on and trans was just done unit is in excellent shape very well maintained. eng ser. 79313587 and vin 1xkwd49x899j249826. We suspect its coming from engine oil cooler,
can you provide anyway to confirm where this oil is coming from.
Submitted: 2 years ago.
Category: Medium and Heavy Trucks
Expert:  Wayne replied 2 years ago.
Hi I'm Wayne
I will help you with this
Yes I suggest to start with the oil cooler
remove it take to a radiator repair shop
they will pressure test it, submerge in a tank of water
most common problem is the O-Rings in the cooler
if that test OK, the drop oil pan, and pressure the cooling system to
12 lbs, and look at what cylinder is dripping coolant, then you know what liner is leaking
If this helped you, Please rate my answer
Customer: replied 2 years ago.
ok let you know what we find
Expert:  Wayne replied 2 years ago.
Thank You
Customer: replied 2 years ago.
Wayne, It was engine cooler leaking really bad.steve
Expert:  Wayne replied 2 years ago.
That is great , was the easy one,
Glad it was nothing big,
Please remember to rate my answer
so I get credit for question