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Head Gasket Replacement Info

eoseitz

Well-known member
Joined
Sep 22, 2009
Messages
154
Location
Marion, OH
Corvette
1974 Stingray L82
Hey Everyone,

I am building an engine for my 1974 Corvette. I have a rebuilt 1981 LT9 short block that is bored .30 over with a mild edelbrock Cam. I was able to pick up a pair of freshly rebuilt 1966 462 camel hump heads that are setup for rocker studs, port polished, ect. I got a fairly decent deal on them. $700 for the block and $450 for the heads.

I'm buying up the remainder of the parts I need to finish putting it together and after buying the head gasket, I noticed something strange. The felpro gaskets (7733-pt-2) says it's made for 1955-93 GM 350s and 1967-2001 GM 350s. However, some of the holes aren't as big as the ones on the block. Is this a problem? I'll post pictures below.

The red marks show holes that are smaller or misshaped on the gasket and the red green marks show missing holes on the gasket.

IMG_1243.jpgIMG_1244.jpg
 

Tom Bryant

Well-known member
Administrator
Joined
Nov 9, 2000
Messages
7,255
Location
Edgerton, Ohio, United States
Corvette
1959 black 270hp (9/2/69) 1981 Beige L81(10/20/80)
The small holes in the gasket are more to allow steam to escape from the block to allow for complete filling of coolant around the cylinders than they are for coolant flow. The size and odd shape of the holes is more for ease of casting than for flow volume.

Tom
 

eoseitz01

Active member
Joined
Feb 2, 2015
Messages
31
Location
Marysville
Ok. Thanks for the info. I kind of thought that, but it's better to make sure.


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