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Head gasket bore question?

Generation III Internal Engine 1997-2006 LS1 | LS6

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Head gasket bore question?

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Feb 9, 2013 | 04:42 PM

#1

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Head gasket bore question?

I have an iron block 410ci motor....the bore is 4.040 and 243 heads. What bore head gasket will I need? My old 4.040 gasket got burnt up on the edges on the passenger side, guess it was sticking to far into the combustion chamber

I cannot use a GM gasket because I need a cometic that is 0.061 thick. So i just need to know if something like a 4.100 bore custom gasket will work.

thanks in advance

Last edited by dubrado; Feb 10, 2013 at 01:45 AM.

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Feb 9, 2013 | 05:17 PM

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From: MIchigan

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What heads are you using...the gasket needs to match the larger of the two (bore/heads).

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Feb 10, 2013 | 12:45 AM

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Quote:

Originally Posted by RQSGTO

What heads are you using...the gasket needs to match the larger of the two (bore/heads).

for got that, I'm runnning 243's...I imagine I can run a 4.1 bore....is that correct? (from what i've read and searched)

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Feb 10, 2013 | 03:16 AM

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From: BFE

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I like to run at least .030 larger than bore.So on your setup I would run 4.070 or bigger (next step bigger than that)

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Feb 10, 2013 | 11:33 AM

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Quote:

Originally Posted by PREDATOR-Z

I like to run at least .030 larger than bore.So on your setup I would run 4.070 or bigger (next step bigger than that)

I think cometic site says they have a 4.085 and a 4.1 bore but the 4.1 bore has the thickness I need.

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Feb 10, 2013 | 11:36 AM

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From: BFE

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Then run the 4.1 bore

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Feb 10, 2013 | 01:53 PM

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The 4.085" Cometic gasket should be fine. Looking at Texas Speed, it looks like you can get .060" thick in the 4.085" gasket.

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030, 4040, 4070, 4080, 4085, 41, 53l, 60, bore, cometic, gasket, gaskets, head, run, work

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