2010 Cummins isx burning coolant

ISX How To Check Your EGR Cooler For Leaks by Rawze
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A lot of shops won't have a 4 gas analyzer or the adaptor and scope to check for pulsation in the cooling system.

 

Remove vent line to radiator, install clear line in plave for test, fill system, drive around or put up on high idle, look at clear line with shop light or flashlight, look for air bubbles, b4 and after tstat opens, no air, look at outlet of egr cooler for moisture. If has air in line bypass air comp water plumbing, retest, make sure unit has no air operated controls in cooling system. Then if still has air, head or bigger problems, but you could also pull exhaust back and check ports to pinpoint. If it uses that much coolant, dpf problems will be in near future

 

If the EGR cooler is dumping coolant aft of the turbo it's going to destroy the precious metals in the One-Box with the corrosive characteristics of the coolant and you'll be looking at a significant cost sooner rather than later. Much sooner. My 2016 DD15 and I went down this road and the One-Box was over $10,000 just for the part.

I can't recall although I owned a 2012 ISX 600hp with a full DEF system, but If this engine has a history of losing coolant and it's a full SRC system your likely already on your way to that. Not to mention an EGR Cooler. I did that on my Detroit a year ago and they're near $3,000 now, too.

 

Detroit has a tool where you disconnect the EGR Valve and the front of the EGR Cooler and it basically seels it off. And it has an air attachment and a pressure gauge so you connect a compressed air source and charge it up to determine if its leaking. Maybe Cummins has the same