So I have this dead 01 4.0 that needs a rebuild. Best kit? - JeepForum.com
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Unread 03-25-2015, 06:30 PM   #1
FairlanePhil
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1999 XJ Cherokee 
 
Join Date: Feb 2010
Location: Toledo Ohio
Posts: 1,805
So I have this dead 01 4.0 that needs a rebuild. Best kit?

0331 head. Wife overheated it pretty bad trying to get home.
I parked it and bought her a new vehicle.

Weeks later it ran and drove fine when it was -5 degrees and even sounded pretty good. The oil doesn't have water in it but I'm not gonna be that guy and try and use it as is. It never works out for me. I think I will have it rebuilt.

Who's selling the rebuild kits for the best price these days?
Do I have to wait for machining to be done to buy the correct size pistons?

It's been a long time since I had an engine done.

I also need to redo my 246K mile 99 head. Can I just lap the valves and put in new seals or do I need new valves? Can I reuse the rest of the valvetrain or should I go all out and have new studs put in and get new rockers and springs?

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Current: 99XJ 6.5 lift-Bought 2015
Sold: Patriot Blue 00 XJ.
'sploded: 01 stock-0331 head victim
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Unread 03-26-2015, 10:40 AM   #2
Motorcharge
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1991 MJ Comanche 
 
Join Date: Oct 2008
Location: , Virginia
Posts: 12,521
Drive it for a few weeks and see how it does. There's absolutely no reason to rebuild if it didnt crack. Even then there no reason to do the bottom end. If you're going to waste money tearing down a 4.0 you might as well stroke it.
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Unread 03-26-2015, 10:56 AM   #3
FairlanePhil
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1999 XJ Cherokee 
 
Join Date: Feb 2010
Location: Toledo Ohio
Posts: 1,805
Quote:
Originally Posted by Motorcharge View Post
Drive it for a few weeks and see how it does. There's absolutely no reason to rebuild if it didnt crack. Even then there no reason to do the bottom end. If you're going to waste money tearing down a 4.0 you might as well stroke it.

Already decided and I am not interested in stroking it.

No go-to JF approved brand kits or vendors?
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Current: 99XJ 6.5 lift-Bought 2015
Sold: Patriot Blue 00 XJ.
'sploded: 01 stock-0331 head victim
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