2015 isx15 loosing coolant
12-22-2020, (Subject: 2015 isx15 loosing coolant ) 
Post: #2
RE: 2015 isx15 loosing coolant
(12-22-2020 )Mfrazier6454 Wrote:  I have been loosing about a gallon of coolant a day. Pressure tested the system found 2 small external leaks and took oil pan off no loss out of the bottom. We took the cross over pipe off and it had clear condensation in it as well did the back pipe on the EGR cooler. Today we found coolant in the crank case filter and sludge. The oil and pan are clean of moisture. So we don't know if it's the cooler or a head gasket please help

Is the truck deleted, if so, by who?

Did you pressurize the motor, 20psi, and let sit over night? And was there someone there to bar the motor as someone was underneath with a good flashlight? If you did not, you will be hard pressed to find any coolant leaks in the cylinders. See a photo I took of my cylinder wall after sitting over night under pressure. http://rawze.com/forums/showthread.php?tid=6863&page=4

Same procedure for the EGR Cooler, remove that back hose, pressurize motor to 20psi, put a jar lid or something that can capture coolant at the end of the EGR cooler opening. Check the following day for coolant loss in jar lid or whatever you use...

Also, if you did the other tests correctly, under pressure, have you removed the DPF/DOC cans and checked for coolant intrusion? Any smoking out of the exhaust?

The air compressor too, it is liquid cooled, have you checked the air dryer for coolant contamination? And the air compressor to ensure it is functioning properly? Any issues with it building air pressure or the air dryer not functioning properly?

On that crankcase filter, did you inspect the drain hose to ensure it is not plugged up with something?

Also, if you do not have a free Cummins Quickserve account, now would be the time to open one. You will need your Engine Identification Number (EIN) found on the valve cover data plate. https://quickserve.cummins.com/info/index.html

Registration is free, and you will have access to all of the repair and trouble shooting manuals the dealers use. Good place to start.


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 Thanks given by: Mfrazier6454


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RE: 2015 isx15 loosing coolant - Waterloo - 12-22-2020



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