How to identify 0331 or TUPY head
Hi everyone, I've searched for this and haven't really found any good answer. I have an '01 tj with the 4.0 engine. I would like to find out how to identify what head my engine has on it. I've read that the heads labeled 0331 are prone to cracking and that they were changed to a head labeled
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Post Head swap (0331 Tupy) questions - Jeep Cherokee Forum
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suspect cracked cylinder head. yes its a 0331 - Jeep Cherokee Forum
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Is my 0331 cracked? Pics Inside. - NAXJA Forums -::- North
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How to identify 0331 or TUPY head
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00-06 Jeep Wrangler TJ 4.0 TUPY 0331 Cylinder Head Cherokee Grand
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Is my 0331 cracked? Pics Inside. - NAXJA Forums -::- North
![](https://www.enginebuildermag.com/wp-content/uploads/Articles/10_01_2004/100423gif_00000002770.gif)
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Should I avoid the 0331 head?
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Post Head swap (0331 Tupy) questions - Jeep Cherokee Forum