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What size are head bolts?

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Old 03-29-2002, 02:15 PM
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Smokehouse69
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Default What size are head bolts?

I'm going to clean up the threads before I install my new heads and I want to make sure I use the right tap.
Old 03-29-2002, 03:07 PM
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Edzred72
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Default Re: What size are head bolts? (Smokehouse69)

Sorry, I don't know the exact size to help you, but when I'm not exactly sure of a tap size, I find a new nut that screws onto the bolt that came out of the tapped hole. Then try screwing a tap into that same nut. With light pressure on the tap twist, you should be able to match the threaded hole. Of coarse, feel is everything. Sounds Buba.. but works when your unsure. :cheers: :cheers:
Old 03-29-2002, 03:57 PM
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john's '81 mouse
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Default Re: What size are head bolts? (Smokehouse69)

Going from memory hear, but believe S/B head bolts are 7/16" National Coarse (NC), either that or 1/2" NC.
Old 03-29-2002, 07:43 PM
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Clink69
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Default Re: What size are head bolts? (Smokehouse69)

Frankensteins head bolts where 1 1/2 " by 4 " , but that has nothing to do with Vettes does it. :jester

:flag
Old 03-29-2002, 11:51 PM
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Edzred72
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Default Re: What size are head bolts? (Clink69)

[QUOTE]Frankensteins head bolts where 1 1/2 " by 4 " , but that has nothing to do with Vettes does it. :jester :flag [/QUOTE

:lol: :lol: U'r nuts!! Keep em comming!! :cheers: :cheers:
Old 04-02-2002, 08:54 PM
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rod73vette
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Default Re: What size are head bolts? (Smokehouse69)

Hi,

If your car is a small block (350) then the head bolts are 7/16" - 14.

See Ya,

Rod Hisle :flag

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