Cometic gasket?

Lonnie Cox · 04-23-2012, 12:20 AM

A small block chev gasket 40 thou thick,how much will it compress to?

Alan Roehrich · 04-23-2012, 01:13 AM

A Cometic gasket will only compress to the thickness of the individual pieces. Usually you have a 0.020" stainless piece in the center, and then two coated pieces riveted to it. Measure the unembossed thickness of the two coated pieces, and add that to the 0.020" stainless piece in the center, that's your minimum compressed thickness.

BillK · 04-23-2012, 07:05 AM

Lonnie,
You can call them to verify it, but as far as I know, the thickness listed is the compressed thickness. In other words if the gasket part number ends with -40, it will be .040 compressed thickness.

rickseeman · 04-23-2012, 09:29 AM

I think they give you the compressed thickness and the cc's.

04-23-2012, 12:20 AM	#1
Lonnie Cox Junior Member Join Date: May 2010 Posts: 88 Likes: 0 Liked 0 Times in 0 Posts	Cometic gasket? A small block chev gasket 40 thou thick,how much will it compress to?

04-23-2012, 01:13 AM	#2
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,113 Likes: 1,571 Liked 1,827 Times in 414 Posts	Re: Cometic gasket? A Cometic gasket will only compress to the thickness of the individual pieces. Usually you have a 0.020" stainless piece in the center, and then two coated pieces riveted to it. Measure the unembossed thickness of the two coated pieces, and add that to the 0.020" stainless piece in the center, that's your minimum compressed thickness. __________________ Alan Roehrich 212A G/S

04-23-2012, 07:05 AM	#3
BillK Member Join Date: Nov 2005 Location: Waldorf Md Posts: 230 Likes: 12 Liked 30 Times in 17 Posts	Re: Cometic gasket? Lonnie, You can call them to verify it, but as far as I know, the thickness listed is the compressed thickness. In other words if the gasket part number ends with -40, it will be .040 compressed thickness. __________________ Bill Koustenis

04-23-2012, 09:29 AM	#4
rickseeman Member Join Date: Sep 2011 Location: Stuttgart, AR Posts: 125 Likes: 0 Liked 2 Times in 2 Posts	Re: Cometic gasket? I think they give you the compressed thickness and the cc's.