(2014) ISX15 coolant help!
10-16-2020, (Subject: (2014) ISX15 coolant help! ) 
Post: #4
RE: (2014) ISX15 coolant help!
If you are going from blue to green on the block test kit, you have exhaust gas in your coolant system. I have been through this test a few times, it was always a fretted liner.

I would drop the oil pan, then pressurize the the coolant system to 20 psi, let it sit overnight, get under the truck with a very bright flashlight and have someone bar the motor by hand. If there is a fretted liner, you may hear gurgling up in the head and you are looking for droplets of coolant on the liner walls.


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RE: (2014) ISX15 coolant help! - Waterloo - 10-16-2020



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