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Well that is why I thought I had the cooling problem for a long time, so that is why I suspected it was an issue. I read another post on another site where the guy had running hot problems, tested...

There's no replacement for displacement, so if you want even more torque, you need a bigger engine.

The 4.0L engine has a 3.411" stroke, 3.875" bore, 6 cylinders, and a displacement of 241.5ci...

what about .040?

Oh it was in the post above. I'm going to get another block build a stroker and then rebuild the 4.0L I have in the 98 now, later.

So for the stroker I was going to have it bored for more cubes.

How far do you think I can have it bored without running into a cooling problem?

Yeah more of what I have to research. I mean I know I didn't want a 2000/2001 head because of their issues.

Well I need to get the shed up in the back yard. Move the crap in the garage out there then get an engine stand and a block. Once I have that then I can start working on it and collecting parts. I...

Thanks guys, but it's not a pull it and see situation. Remember this is a daily driver so down time is critical. I'll get to it but with the coolant temp situation cured for the moment I'll run it...

Well to be accurate I should say I have evidence of exhaust gasses in my coolant system. How it got there I cannot say. The most likely cause is a blown head gasket, a crack in the head or block,...

Oh I like that, just won't know if it's cracked until the the machine shop gets it.

It would need a value job though wouldn't it?

So I'm considering my options.

I can pull the head off check to see if it is warped, and if so, take it to a machine shop and have the head tested for cracks and shaved so it will be flat again.
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As I suspected for some time now I have a blown head gasket on the 1998. I ordered the exhaust leak test kit from Amazon the other day and didn't get around testing the Jeeps until today.

I...