02 WJ 4.0 good base?

[FlameRedTJ]

Sorry for the non search but its kind of a quick deal and just wanted to get a few opinions.

 

[beraad44]

are you wanting to build up a WJ or are you putting a WJ 4.0 in a XJ

 

[FlameRedTJ]

Well actually it'd be in a TJ. This is just the engine. I've been told the 2000s and 01's were prone to head cracking but just wanted to check. He says its got 80k miles and needs a valve job and head gasket. If its decent I might just run it. But really itching to do a 4.6.

 

[Talyn]

Supposedly the factory fixed the bad 0331 head casting in 03 or 04. I know that there are some difficulties putting a WJ block into an XJ, but I don't know about a TJ.

If it needs a valve job and head gasket and.or you are planning to build a stroker I would try to find a block out of a TJ instead of the WJ one.

 

[beraad44]

i got a 03 TJ engine in my XJ. it was taken out of a wrangler then into a WJ then into my jeep. it runs great it had 60000 miles on it. i had to put a head gasket and waterpump on it. the head is slighlty warped to i will have to get it milled. its great because now the alternator is on top away from water. id say go for it

 

[FlameRedTJ]

So that 03 engine has the alt on the top of the engine? My 2.5 is torwards the bottom end but hasn't been a problem. This 4.0 should be the same. How are the intake manifolds on the 02's?

 

[beraad44]

the intakes are the newer more curved design and have much more room for air. your supposed to get more power.