So with my truck on stock tune I dnt lose coolant. But any kind of tune I put on, I lose it. If boost pressures exceed 20lbs. Trucks completely bulletproofed. Bad gasket job? No I dnt hav coolant coming out of degas bottle. No leaks. When parked on cement this truck has zero leaks. Where does coolant go and how/why????

 

It goes out the tailpipe

 

How does it get into pressurized chamber? Cracked head? Airpocket?

 

Mine did the same thing and I never figured it out... I would like to know the answer as well

 

My shop i go to can possibly help you over the phone and point you in the right direction . Call dagger diesel performance in Calgary alberta canda - they have pin pointed everything I ask over the phone good quality honest shop

 

Seems like a head gasket is leaking into the cylinder and burning off the coolant . which is why you don't see it

 

I agree with the bad head gasket theory, I have seen it happen. The coolant burns off in the exhaust, depending on how bad it is you might be able to see some light white smoke.

 

I would check the heater core before I went through with new headgaskets. It probably is head gaskets, but the heater core takes 5 minutes to get to in these trucks so it couldn't hurt to check.