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Old May 4th, 2022, 08:51
smokeyyank smokeyyank is offline
NAXJA Forum User
Join Date: Jul 2014
Location: Littleton, Crawlarado
Posts: 1,165
Re: 04 WJ cylinder head question

0331 is the one prone to cracking. 02 was the change over year for the TUPY for the WJ. Someone could have swapped in the 0331 head. A few aftermarket companies have to the 0331 as a rebuild.

For example
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