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  #1  
Old December 15th, 2017, 19:39
Brian82 Brian82 is offline
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0331 head vs 0630.

Rebuilding my 98 4.0. I sent the 0630 head out to get redone and they found 5 cracks... Cracks kills.. I have a usable 0331 head, but I know they are prone to cracking and they have there differences... Exhaust Port size, location, deck thickness, ect.. I still have the older style intake manifold, and the older style exhaust manifold. Am I wasting time trying to use the 0331 head?
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Old December 15th, 2017, 19:57
Heavyopp Heavyopp is offline
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Re: 0331 head vs 0630.

Yes -- find another 0630 or 7220? Head and have it rebuilt
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Old December 16th, 2017, 12:09
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Tim_MN Tim_MN is offline
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Re: 0331 head vs 0630.

The XJ 0331 head is a waste of time and money. Find an 0630 or 7120 head.
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Old December 16th, 2017, 12:55
RCP Phx RCP Phx is offline
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Re: 0331 head vs 0630.

Or a TUPY version of a 0331 !!!
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Old December 16th, 2017, 17:27
Brian82 Brian82 is offline
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Re: 0331 head vs 0630.

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Originally Posted by RCP Phx View Post
Or a TUPY version of a 0331 !!!
Yeah, I don't have a Tupy version or I would have kept it.
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  #6  
Old December 16th, 2017, 17:33
Brian82 Brian82 is offline
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Re: 0331 head vs 0630.

I ordered a 0630 head on rockauto today, screw it. $300 with return shipping for the core. Can't beat that price.
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