4.0 short block

Hesco comes to mind.
http://www.hesco.us/products/7733/engines

Check your local machine shop sometimes they have customers that dont pay for stuff or have cores that they can reman. There is always jasper.

Meh its a 4.0l it will probably last another 100k.

I just had mine rebuilt at Long Engine Works in Elkton Md. Little less then 2 grand and it runs great. Jasper was like 2900 and you don't know how abused the core was that your getting. I'd rather have my own engine rebuilt myself

Try putting some Lucas oil additive to increase the oils cohesion and lubricity. How does your oil pressure behave once warmed up; does it seem to drop a bit at idle or hover around 15 psi?

Quote from HuntinDE

I have a tick sound i think its coming from the lower end. it would go away after the engine was up to temp, now it stays. almost 150000 miles so maybe time to rebuild

Have you ruled out a cracked exhaust manifold? Your symptoms also fit that problem perfectly.

Quote from astape

Meh its a 4.0l it will probably last another 100k.

Tell that to Jen's WJ.

Check your header at the collector.

If you have some power loss I'm thinking your head gasket may have blown.

4.0 motors are notoriously noisy. I've had 4 Cherokees and a wrangler that all had 200 plus miles on them. Except one, all of them had cracked exhaust manifolds, that ticked. A leaky exhaust manifold can cause a loss in power poor fuel economy.

Quote from shadyluke

I've had 4 Cherokees and a wrangler that all had 200 plus miles on them. Except one, all of them had cracked exhaust manifolds, that ticked.

If your track-record is 80% cracked exhaust manifolds after only 200 miles, you are doing something wrong.