Jeep coolant temperature help

[THEFERMANATOR]

Originally Posted by Destroyer

Ferm, I just might need that engine. My 98 Cherokee ran super hot due to loss of coolant, and now it has low compression in 3 cylinders. (2,3, and 5) I know it;s my own damn fault for running it hot, but I was in a bad spot on the freeway and really didn't have a choice. Anyways I suspect a blown head gasket caused the initial coolant loss. I won't know till the spring when it's warm enough to work on it outside what the total damage is. I'm thinking a head gasket and probably broken rings. But if it's anything more than that a transplant may be necessary.

Yep, sounds like some broken rings. Problem is the newer 96+ metric hyperautic pistons seem to crack a lot more so than the early style cast pistons did when run hot. I've scrapped out a few, and the 96+ engines seem to have cracked pistons in them when run hot whereas the early cast pistons would be fine.