5.9L phantom coolant leak
I've had my 1998 JGC 5.9L for a couple of years now and love it. However, it's had a recurring but intermittent problem nearly the entire time I've owned it. Basically, the coolant level mysteriously drops from time to time, primarily during or after long road trips. I had the system pressure-tested, which seemed to point to a faulty radiator cap. Unfortunately, the problem continued after I replaced the cap. Engine oil is coolant-free when I change it, and no puddles of coolant appear under the Jeep while it sits in my garage.
It seems obvious that hot coolant is escaping the system from some point while I'm driving. So, where's the leak?
Thanks in advance!