X15 in a 2019 KW T800 We had a problem of losing coolant with no visible leak. Looked at the end of the EGR cooler and there is coolant in there. We’re getting that swapped out soon. When I had the rear cooler tube off, I could see oil and dried oil caked up in front of the EGR valve and in the cooler too. The turbos shaft end play was good and it was not leaking. What would be the next troubleshooting steps to fix the oil loss?
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