So awhile ago I found some coolant under the rocker cover (haven't been able to take it to a mechanic to see what it actually is) and I'm wondering what the best option would be
I could get a head from an older model and put on but I'm not 100% what ones it would be or get a completely different engine.
2001 4.0L XJ From Australia

 

Unfortunately that looks like the typical 2000/2001 cracked head.

 

New heads are available from Clearwater. They have an excellent reputation on Jeep forums.

However, the question that has to be answered is, "How much damage has already been done to your bearings?"

If your oil pressure is still good, you are probably okay. Put a new head on it, flush out the old oil and get on with life.

But stop driving it! Every mile increases the likelihood that you will need a complete rebuild.

 

I've looked at Clearwater but they don't ship to Australia.
I havent driven it since I saw it but last time I did the oil pressure was good (can't remember what exactly)

 

Oh.... well.... hmmmm.

Maybe you could move to the U.S.?

There are probably some good machine shops in your area that rebuild heads. You could get really old-fashioned and make some calls....


There are other options for heads. I don't know the details, but I know that a TUPY head from some of the later Grand Cherokees will work. They were made with the 4.0 for a few more years after the XJ was discontinued, and the TUPY head fixed the casting flaw that caused your head to crack. If you can find one in a junkyard and have it rebuilt, you will be good to go.

Search here on TUPY and you should find the info you need.

 

I took it to the mechanic and he said the head is fine. So I'm not sure what it is

 

I would not call that head fine. That bit of coolant in your opening post is where the head is cracked. Keep driving it like that and the coolant will mix with the oil and take out your bearings.

 

I got mine off a 2003 grand cherokee with a 4.0L its the same 0331 head but is a TUPY head that is casted better so it wont crack like yours did .

 

I'm sure what it is. It's an incompetent mechanic.

 

Is it only the ones from 2003? Or are there other years? also surely it would be a straight swap then?

 

From late 2002 to about 2004 I think but they all have the word TUPY where yours is cracked .