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P8R Head on LS B18B block, what head gasket?

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Old 04-09-2013, 02:48 PM
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Default P8R Head on LS B18B block, what head gasket?

Finding multiple people saying different things here.
Anyone know for sure what head gasket to use for a P8R B20 head and a b18b LS block?

Also, I assume I just use the LS timing belt and water pump, right?

Thanks for any answers. I really appreciate it.
Old 04-09-2013, 02:58 PM
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Default Re: P8R Head on LS B18B block, what head gasket?

FYI, I'm using this head because my stock head is warped and I got a good deal on the p8r.
I'm not trying to build a race car, this is my daily driver.
Old 04-10-2013, 05:23 AM
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Default Re: P8R Head on LS B18B block, what head gasket?

you'll have to use an ls gasket.
Old 04-10-2013, 05:42 PM
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Default Re: P8R Head on LS B18B block, what head gasket?

Originally Posted by kyden
you'll have to use an ls gasket.
So, not the B20 gasket? The p8r b20 head is 84mm, unlike all of the normal b20 heads.
Old 04-11-2013, 06:35 AM
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Default Re: P8R Head on LS B18B block, what head gasket?

yes ls gasket. if you use an 84mm gasket on 81mm sleeves, you're gonna have a leak.
Old 04-11-2013, 07:15 PM
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Default Re: P8R Head on LS B18B block, what head gasket?

81mm gasket
Old 05-09-2013, 10:54 AM
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Default Re: P8R Head on LS B18B block, what head gasket?

Originally Posted by kyden
yes ls gasket. if you use an 84mm gasket on 81mm sleeves, you're gonna have a leak.
appreciate it.
Old 05-09-2013, 11:15 AM
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Default Re: P8R Head on LS B18B block, what head gasket?

try to buy a ls head and sell the p8r head. you can sell the p8r head for a good price cause people are dieing to get ahold of p8r heads.
Old 05-11-2013, 05:33 AM
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Default Re: P8R Head on LS B18B block, what head gasket?

Always match the head gasket to the block you are using or you may have leaks. Yeah why not have your Ls head milled and refreshed and just sell the P8R head. People pay $$$ for them since they are really hard to find.
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