steel head gasket

richie 2 · 07-22-2014, 04:18 AM

just a street 327ci chevy, which steel head gasket will hold up? there use to be some coated ones? any tricks to help seal? thankyou.

Eman · 07-22-2014, 08:07 AM

Mr. gasket made coated ones, spray the gaskets with copper coating when installing. Ck compressed thickness, they're not all the same, and be sure you have enough clearance piston to head.

bigfoot584 · 07-22-2014, 05:04 PM

60's and 70's we'd just used aluminum spray paint coat each side and go for it, it's easy to clean if you you need to remove them also.I always felt that spray gasket stuff was a mess to clean, I wouldn't tell so one they couldn't use it if that's what they wanted to use.

Ed Wright · 07-22-2014, 08:17 PM

We did use high heat aluminum paint on steel gaskets for years with no issues.

I have found many head & block mills around here don't cut a smooth enough finish. That is in the set up of the little cutter bits in the wheel. A slick finish seals steel head gaskets better. Ask me how I know. LOL

I generally use K&W Copper Coat when I reuse a Cometic gasket. Not the first time. Not trying to tell anybody how to do things, just sharing what has worked for me.

FED 387 · 07-22-2014, 08:29 PM

Hylomar by Permatex--- AEROSOL--- is the only stuff to use ----Patterson uses it all the time

richie 2 · 07-22-2014, 09:11 PM

thanks all. we're saving a numbers matching engine. new pistons give me a .017'' deck height. deck surfaces are stock. I've found today that GM sells a .028'' composition gasket that would give me a perfect .045'' quench. im just a little nervious about the deck surface finish that I can't touch...the composition gasket should seal it & would be a better choice that a steel unit...

Ed Wright · 07-23-2014, 07:53 AM

I have not seen a factory deck surface too rough to seal a steel gasket. Here in this area (Tulsa, OK) it is the corner machine shops surfacing heads. & blocks, leaving ridges. Many have a small piece of iron, or sample of the finish their mill provides. Like it is the perfect, or desired finish. The factory machining I have seen is fine for steel gaskets.

SSDiv6 · 07-23-2014, 09:33 AM

Use Hylomar; it is one of the best sealants you can use for cylinder head gaskets.

Although Permatex has their own licensed version, I prefer the original brushable product from Hylomar, Part Number HUBA02.

http://www.zoro.com/i/G1731965/?category=6233

richie 2 · 07-23-2014, 09:55 AM

GM # 10105117 describes that gasket w/4'' bore. it could very well measure .4.065'', which is the smallest I can go. my bore is that size.

richie 2 · 07-24-2014, 02:39 PM

anyone know the bore size of that GM composition gasket?

07-22-2014, 04:18 AM	#1
richie 2 Senior Member Join Date: Feb 2009 Posts: 918 Likes: 321 Liked 157 Times in 73 Posts	steel head gasket just a street 327ci chevy, which steel head gasket will hold up? there use to be some coated ones? any tricks to help seal? thankyou.

07-22-2014, 08:07 AM	#2
Eman Member Join Date: May 2014 Location: E TN Posts: 441 Likes: 14 Liked 105 Times in 60 Posts	Re: steel head gasket Mr. gasket made coated ones, spray the gaskets with copper coating when installing. Ck compressed thickness, they're not all the same, and be sure you have enough clearance piston to head.

07-22-2014, 05:04 PM	#3
bigfoot584 Junior Member Join Date: Jun 2014 Posts: 43 Likes: 0 Liked 0 Times in 0 Posts	Re: steel head gasket 60's and 70's we'd just used aluminum spray paint coat each side and go for it, it's easy to clean if you you need to remove them also.I always felt that spray gasket stuff was a mess to clean, I wouldn't tell so one they couldn't use it if that's what they wanted to use.

07-22-2014, 08:17 PM	#4
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 389 Times in 168 Posts	Re: steel head gasket We did use high heat aluminum paint on steel gaskets for years with no issues. I have found many head & block mills around here don't cut a smooth enough finish. That is in the set up of the little cutter bits in the wheel. A slick finish seals steel head gaskets better. Ask me how I know. LOL I generally use K&W Copper Coat when I reuse a Cometic gasket. Not the first time. Not trying to tell anybody how to do things, just sharing what has worked for me. __________________ Ed Wright 4156 SS/JA

07-22-2014, 08:29 PM	#5
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,349 Likes: 327 Liked 280 Times in 150 Posts	Re: steel head gasket Hylomar by Permatex--- AEROSOL--- is the only stuff to use ----Patterson uses it all the time Last edited by FED 387; 07-22-2014 at 08:31 PM. Reason: addl info

07-22-2014, 09:11 PM	#6
richie 2 Senior Member Join Date: Feb 2009 Posts: 918 Likes: 321 Liked 157 Times in 73 Posts	Re: steel head gasket thanks all. we're saving a numbers matching engine. new pistons give me a .017'' deck height. deck surfaces are stock. I've found today that GM sells a .028'' composition gasket that would give me a perfect .045'' quench. im just a little nervious about the deck surface finish that I can't touch...the composition gasket should seal it & would be a better choice that a steel unit... Last edited by richie 2; 07-22-2014 at 09:15 PM.

07-23-2014, 07:53 AM	#7
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 389 Times in 168 Posts	Re: steel head gasket I have not seen a factory deck surface too rough to seal a steel gasket. Here in this area (Tulsa, OK) it is the corner machine shops surfacing heads. & blocks, leaving ridges. Many have a small piece of iron, or sample of the finish their mill provides. Like it is the perfect, or desired finish. The factory machining I have seen is fine for steel gaskets. __________________ Ed Wright 4156 SS/JA

07-23-2014, 09:33 AM	#8
SSDiv6 VIP Member Join Date: Feb 2003 Location: Glendale, Arizona Posts: 2,991 Likes: 693 Liked 1,457 Times in 543 Posts	Re: steel head gasket Use Hylomar; it is one of the best sealants you can use for cylinder head gaskets. Although Permatex has their own licensed version, I prefer the original brushable product from Hylomar, Part Number HUBA02. http://www.zoro.com/i/G1731965/?category=6233 Last edited by SSDiv6; 07-23-2014 at 09:35 AM.

07-23-2014, 09:55 AM	#9
richie 2 Senior Member Join Date: Feb 2009 Posts: 918 Likes: 321 Liked 157 Times in 73 Posts	Re: steel head gasket GM # 10105117 describes that gasket w/4'' bore. it could very well measure .4.065'', which is the smallest I can go. my bore is that size.

07-24-2014, 02:39 PM	#10
richie 2 Senior Member Join Date: Feb 2009 Posts: 918 Likes: 321 Liked 157 Times in 73 Posts	Re: steel head gasket anyone know the bore size of that GM composition gasket?