Jeep coolant temperature help

[tsubaki]

I actually argued with my father that it was not possible to be the problem. His response was "you done replaced everything else, it's going to be a lot easier changing it instead of replacing the head gasket or timing chain".
The live data stream from the code reader showed the timing jumping all over the place after it got warmed up, I was convinced the timing chain was stretched slightly.
Glad I was wrong and did like Daddy said.

[THEFERMANATOR]

Originally Posted by tsubaki

I actually argued with my father that it was not possible to be the problem. His response was "you done replaced everything else, it's going to be a lot easier changing it instead of replacing the head gasket or timing chain".
The live data stream from the code reader showed the timing jumping all over the place after it got warmed up, I was convinced the timing chain was stretched slightly.
Glad I was wrong and did like Daddy said.

The timing chain would have no effect on the timing. The timing is based off of the crank sensor, and only uses the sensor in the distributor as a sync signal to tell it when it is at TDC on #1 for fuel injection.

[bradford]

Slightly off topic, but Tsubaki I have a 1997 Grand Cherokee my brother in law and I are gonna be parting out if you need any parts. 4.0 engine, 4x4, automatic, black exterior.

[tsubaki]

Thanks bradford, those parts are getting scarce and should command a premium.

[THEFERMANATOR]

I've got a 97 4.0L out of a CHEROKEE that has about 70K miles on it, and I can't give the dam thing away. Tried with a few people and everybody laughed at me. Things hardly ever blow an engine unless you run one hot.

[Destroyer]

Originally Posted by THEFERMANATOR

I've got a 97 4.0L out of a CHEROKEE that has about 70K miles on it, and I can't give the dam thing away. Tried with a few people and everybody laughed at me. Things hardly ever blow an engine unless you run one hot.

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.

[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.