Best head gasket thickness

[Talkwrench]

Ok guys probably been said a few times now but I couldn't find in the 'search' . What is the torqued finished thickness of the Best copper 507 head gasket?

Cheers.

[Tinker]

I "think" torqued is around .050. But if your looking for exact... itll differ for sure.

[Talkwrench]

Not sure they crush down that much.. ? Best don't have info in their site.. Anyone..?


I have an old set of Hallite? that I took off and they measure around .058.

[Talkwrench]

For those interested . Ive had a response for Best gaskets. The compressed thickness is.052" +/- .002

[Phil Gillespie]

Originally Posted by Talkwrench

For those interested . Ive had a response for Best gaskets. The compressed thickness is.052" +/- .002

Thats good. Have a set of copper ones for my engine once all machine work has been completed. Hopefuily in next few weeks.
Copper was recommended for the alloy heads, Edelbrock.
Phil NZ

[revkev6]

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I haven't pulled one to check it but they are listed at .062 compressed

[tubman]

Originally Posted by Phil Gillespie

Thats good. Have a set of copper ones for my engine once all machine work has been completed. Hopefuily in next few weeks.
Copper was recommended for the alloy heads, Edelbrock.
Phil NZ

Really? I find this surprising given the electrolytic properties of these dissimilar metals.

[Phil Gillespie]

Originally Posted by tubman

Really? I find this surprising given the electrolytic properties of these dissimilar metals.

INSTALLATION NOTE: Flathead head copper gaskets for 1938-48 use Victor #3036; or Fel-Pro® #7548; or Edelbrock Head Gasket Set #7394; for 1949-53 use Fel-Pro #1055 and Fel-Pro #1056 or Edelbrock Head Gasket Set #7393. Recommended spark plugs are Champion RC12YC or equivalent 14mm x 3/4" reach with flat gasket seat. Head stud kit for 1938-48, use #8505; Head stud kit for 1949-53, use #8502. Generator stud kit for 1938-48, use #8506.


The above is from the Edelbrock Site and their recommendations.
These I am inclinced to follow as they make the items.


The Periodic Table for metals all depends upon where each metal sits on this table, someting about more noble and less noble metals as i recall from my High School years.


Phil NZ

[Brian]

Could it be that Edelbrock, fully realising the propensity of electrolysis to more rapidly occur between copper and aluminum, actually encourage one to use this setup, as a ploy to shorten life span of said heads, in order the customer will need to buy more sooner?

[tubman]

There is such a thing as an "Anodic Table" that is used to determine the potential for galvanic corrosion. On it copper is -.30, iron and most steel is -.85,. and aluminum, depending on it's composition is -.85 to -.90. For general purposes, the differences between these index numbers should be less than .25 and certainly no more than .50. In harsh environments, it should be no more than .15. I got these figures from Wikipedia, which has no reason to mislead us that I can see. From this, copper would seem to be a poor choice for head gaskets.

I am not trying to start an argument about this, but I have always heard that copper gaskets should NOT be used with aluminum heads. It was surprising to me to hear that Edelbrock actually recommends them. I would hate to think that "Brian" is right, but you never know. I always use composition gaskets and try to avoid adhesive type sealer like the plague in case I ever have to remove them. So far I've had excellent luck with plain ole wheel bearing grease.

[Talkwrench]

Originally Posted by revkev6

I haven't pulled one to check it but they are listed at .062 compressed

Kev where did you see this?

[Brian]

Talkwrench- why do you doubt what I've told you? .050"-.055" is compressed thickness of those Best brand copper head gaskets you got from me!

[revkev6]

Originally Posted by Talkwrench

Kev where did you see this?

Google lol. The ads for them say .062

[Talkwrench]

I wouldn't doubt you Brian, you're right [see what Best gaskets sent]. just asking the question where Kev had seen .062 ..