2001 XJ Cracked Head Question!
#1
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Year: 2001
Model: Cherokee
Engine: 4.0
2001 XJ Cracked Head Question!
I have an 01 XJ with the usual cracked 0331 head...
I got a replacement motor out of a 2000 with around 110k on it in good shape.
My question is, do I find a 0630 head and get an aftermarket header, or can I run the 0331 thats on the motor with a low temp thermostat and a flowcooler high flow water pump?
Thanks for the help guys!
I got a replacement motor out of a 2000 with around 110k on it in good shape.
My question is, do I find a 0630 head and get an aftermarket header, or can I run the 0331 thats on the motor with a low temp thermostat and a flowcooler high flow water pump?
Thanks for the help guys!
Last edited by RicoSuaveXJ; 09-26-2014 at 12:01 AM.
#2
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I'd run the head you have with a stock thermostat. Running a lower thermostat temp doesn't mean the engine will run any cooler. If that head cracks, which it may likely never do, then consider your options for a replacement.
#3
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Year: 2000
Model: Cherokee
Engine: 4.0
With the probability of another problem down the road since there are known issues with these heads, I would fix it once.
Someone told me in another thread to find a 03 or newer TJ or WJ with a Tupa casting. Whatever that is.
Someone told me in another thread to find a 03 or newer TJ or WJ with a Tupa casting. Whatever that is.
#4
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If there's nothing wrong with the head on the replacement engine, you can use it...but make sure your cooling system is in prime condition. That said, I am also of the mind to replace it now, while everything is out and easily accessible. Those heads are prone to cracking, as stated and as you have found out with your old engine, it may cost a little more right now and take some more time to do, but if it were me, that's what I would do. Remove the weak link while you can.
Last edited by Rogue4x4; 09-26-2014 at 10:36 AM.
#7
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Year: 2000
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Engine: 4.0
How do you know that the head in the replacement engine is not cracked? Others may disagree but 00-01 heads fall in two categories: ones that have/are cracked and ones that will crack sooner or later.
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#8
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Year: 2001
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The guy I got the replacement motor from said it ran well, no coolant in the oil, and good oil pressure. At this point I'm just going to replace the head as a precaution. Don't want to do this again!
Last edited by RicoSuaveXJ; 09-27-2014 at 09:33 AM.
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