4.190" headgasket okay with a 4.155" bore? - LS1TECH

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4.190" headgasket okay with a 4.155" bore?

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Old 05-29-2012, 07:05 PM   #1
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Default 4.190" headgasket okay with a 4.155" bore?

I am about to put my engine back together once I get the bearings and gaskets. My initial setup had 4.165" head gaskets on my 4.155" bore block (434ci) and I was told that ill be receiving 4.190" head gaskets this time around. Will I run into any issues running head gaskets this size? The engine will see some nitrous.(150-250 shot)
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Old 05-29-2012, 07:19 PM   #2
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4.190" gasket bore will be fine.
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Old 06-09-2012, 08:19 AM   #3
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Correct! They will be fine!
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Old 06-11-2012, 09:52 AM   #4
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Yea, no problem. Keep in mind most OEM GM gaskets run a good bit larger than the bore size they are being run on.
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Old 06-11-2012, 10:32 PM   #5
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Yes is fine ...
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Old 06-12-2012, 03:27 PM   #6
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Quote:
Originally Posted by Snyper View Post
I am about to put my engine back together once I get the bearings and gaskets. My initial setup had 4.165" head gaskets on my 4.155" bore block (434ci) and I was told that ill be receiving 4.190" head gaskets this time around. Will I run into any issues running head gaskets this size? The engine will see some nitrous.(150-250 shot)

Ask your engine builder what the compressed thickness of your new gasket is compared to your old gasket. This can effect your compression ratio.

Also, where is your piston deck when the engine is cold? Is it above the block, equal to the block, or below the block?

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350, 4155, 4165, block, bore, bored, difficult, engine, forced, gasket, head, induction, ls, ls1tech, pontiac, size

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