Head gasket questions
Thread Starter
Drifting
Joined: Apr 2002
Posts: 1,720
Likes: 19
From: Manhattan Beach Ca
Head gasket questions
My bore is 4.030 but gaskets come in 4.000, 4.100, 4.200 etc....
Will the 4.000 cover me or must I get the 4.100 or bigger?
I'm looking for 0.030 compressed thickness, should I go copper or is composite OK for Aluminum heads and steel block? Recommedations?
Will the 4.000 cover me or must I get the 4.100 or bigger?
I'm looking for 0.030 compressed thickness, should I go copper or is composite OK for Aluminum heads and steel block? Recommedations?
Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
Composites are good. Fel-Pro Permatorque..
As far as the bore size- I'd personally not use the 4.00 gasket on a bigger bore. That little edge hanging out would give you a really good hot spot and some pre-ignition for a while. But I bet on the flip side there's guys running a 4.00 gasket on a 4.060 bore. Just my $.02
As far as the bore size- I'd personally not use the 4.00 gasket on a bigger bore. That little edge hanging out would give you a really good hot spot and some pre-ignition for a while. But I bet on the flip side there's guys running a 4.00 gasket on a 4.060 bore. Just my $.02
Racer
Joined: Apr 2004
Posts: 401
Likes: 0
From: IL
It's your bore of 4.030", plus the chamfer around the bore that also needs to be figured in. Most engines would use the #1003 w/ 4.166" bore I.D., cast heads and block. Many have used with aluminum heads, those that repeatedly teardown (racers) would see some slight brinelling in the alum head where the C.O. armor sits (has steel wire inside armor). Another good choice is the #1010 which is used with Corvette heads ('87-91 heads) and has a copper wire in the C.O. armor which would leave no brinelling and is used with your new bore size.
Sometimes cylinder head manufacturers design around a common head gasket design and may have a certain number to use, research that also.
Like stated above, if it's too close or hangs over it'll cause detonation and a pile of junk.
If you go copper, go 4.200".
http://www.21cgt.com/FMWebCatalog/default.htm
Hope this helps,
Later.
Sometimes cylinder head manufacturers design around a common head gasket design and may have a certain number to use, research that also.
Like stated above, if it's too close or hangs over it'll cause detonation and a pile of junk.
If you go copper, go 4.200".
http://www.21cgt.com/FMWebCatalog/default.htm
Hope this helps,
Later.
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
Originally Posted by Surfer69
My bore is 4.030 but gaskets come in 4.000, 4.100, 4.200 etc....
Will the 4.000 cover me or must I get the 4.100 or bigger?
I'm looking for 0.030 compressed thickness, should I go copper or is composite OK for Aluminum heads and steel block? Recommedations?
Will the 4.000 cover me or must I get the 4.100 or bigger?
I'm looking for 0.030 compressed thickness, should I go copper or is composite OK for Aluminum heads and steel block? Recommedations?
5764, 4.100 bore, .026 compressed, 5.4cc volume, iron/alum.
$14.99 each in competition products catalog.
Last edited by Little Mouse; Nov 22, 2006 at 09:11 PM.
Drifting
Joined: Apr 2002
Posts: 1,716
Likes: 4
From: New Baden Illinois
Originally Posted by Little Mouse
if you have not 0 decked your block you can use felpro victor part#
5764, 4.100 bore, .026 compressed, 5.4cc volume, iron/alum.
$14.99 each in competition products catalog.
5764, 4.100 bore, .026 compressed, 5.4cc volume, iron/alum.
$14.99 each in competition products catalog.
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Le Mans Master
Joined: Oct 2001
Posts: 5,943
Likes: 3
From: Wildwood IL
Originally Posted by dgruenke
Where can you get this gasket?
Eddie
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Originally Posted by Scott Marzahl
Isn't that a Victor Reinz P/N available from NAPA.
However, LM's specs are correct and ... make VR5746 a good choice for a 4.030" chamfered bore w/ Al heads.