Looking for the right cylinder head

s7tech · Aug 19, 2007

I just tore my 1990 cherokee with a 4.0 liter apart hoping to find the head gasket blown but it was the cylinder head. I looked in the old post and could not really find any information on where is the best place to buy a replacement. What is the difference between a 0331 and 0631 head? What should I have to spend? I am thinking of calling Scotty's Jeeps in fontana and seeing what they have lying around. Thanks Danny

xjtrailrider · Aug 19, 2007

s7tech said:
I just tore my 1990 cherokee with a 4.0 liter apart hoping to find the head gasket blown but it was the cylinder head. I looked in the old post and could not really find any information on where is the best place to buy a replacement. What is the difference between a 0331 and 0631 head? What should I have to spend? I am thinking of calling Scotty's Jeeps in fontana and seeing what they have lying around. Thanks Danny

For ease of replacement I would go with another RENIX head, 87-90. I don't know the casting number for the RENIX, some one on here will.

avnsteve · Aug 19, 2007

this is a prime opportunity to "upgrade" to an HO head. a quick search will turn up compatibility details...

if an upgrade doesn't do it for you, just stay with the renix heads, they're good for <200,000 miles

JNickel101 · Aug 19, 2007

the 0331 was used in 00-01 XJs, and its the one prone to cracking....

0630 is genrally considered one of the most reliable head castings...

GrimmJeeper · Aug 19, 2007

search for 0331 head and you will see the number of threads where people have had cracking problems..... its almost as high as the number of people who've had rusty's track bars fail

Looking for the right cylinder head

s7tech

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xjtrailrider

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avnsteve

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JNickel101

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GrimmJeeper

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