Head gasket question.
Le Mans Master
Joined: Aug 2017
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From: Cool Northern Michigan
According to Hot Rodders web site, all 17 head bolts enter into the water jacket. No hydro-lock possible. And that's why you use thread sealant.
Myself, I can't remember. I thought there were four blind holes. But always used ARP sealant as per their instructions.
Myself, I can't remember. I thought there were four blind holes. But always used ARP sealant as per their instructions.
Drifting
Joined: Jul 2012
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From: Slovenia, EU
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Sorry for stealing this thread but which gasket do you suggest for 71 with 350/270bhp engine? The heads look stock and I'm taking them off to replace leaking valve seals.
Dr. Detroit
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From: New Braunfels Texas
Jebby
Drifting
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From: Slovenia, EU
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And as for sealer you mean this one?
https://www.permatex.com/products/ga.../?locale=en_us
Last edited by Primoz; Aug 13, 2021 at 05:56 PM.
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I was thinking he meant valve SEALS. but who knows. And seals can be changed with heads in place.
However, I thought I would chime in on this thread as soon I am going to be putting on the Fel-Pro .015 shim head gaskets with Aluminium heads. I have done a bit of reading on this. And yes almost everyone says to spray them with copper gasket seal. However, I've been finding a mix of thoughts on the need to go back and re torque the gaskets.
Looking for thoughts on that. is it necessary to re torque the heads and if so after what time interval?
However, I thought I would chime in on this thread as soon I am going to be putting on the Fel-Pro .015 shim head gaskets with Aluminium heads. I have done a bit of reading on this. And yes almost everyone says to spray them with copper gasket seal. However, I've been finding a mix of thoughts on the need to go back and re torque the gaskets.
Looking for thoughts on that. is it necessary to re torque the heads and if so after what time interval?
Dr. Detroit
Joined: Mar 2012
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From: New Braunfels Texas
Heads are going to the builder to get them cleaned, change the valve seats and the whole rework.
And as for sealer you mean this one?
https://www.permatex.com/products/ga.../?locale=en_us
And as for sealer you mean this one?
https://www.permatex.com/products/ga.../?locale=en_us
https://www.permatex.com/products/ga...-temp-sealant/
They use to make it in blue or copper than discontinued the blue. The blue was called "High-Tack"
Jebby
Dr. Detroit
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To clean blocks and head surfaces....the 3M Roloc bristle discs are the order of the day....nothing better and they do not damage surfaces. Green for cast iron, white for aluminum. Fun Trivia: The white 3M bristle discs were designed by 3M for Chrysler in 1999 for the 100% failure rate interference Neon 2.0l engines.
https://www.3m.com/3M/en_US/p/d/b40064937/
Jebby
Last edited by Jebbysan; Aug 17, 2021 at 10:16 AM.
Burning Brakes
Joined: Sep 2019
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From: North Port, FL
The stock replacement gasket is fine, but I will not install them without the Copper Spray I mentioned above.....just an added layer of caution.
To clean blocks and head surfaces....the 3M Roloc bristle discs are the order of the day....nothing better and they do not damage surfaces. Green for cast iron, white for aluminum. Fun Trivia: The white 3M bristle discs were designed by 3M for Chrysler in 1999 for the 100% failure rate interference Neon 2.0l engines.
https://www.3m.com/3M/en_US/p/d/b40064937/
Jebby
To clean blocks and head surfaces....the 3M Roloc bristle discs are the order of the day....nothing better and they do not damage surfaces. Green for cast iron, white for aluminum. Fun Trivia: The white 3M bristle discs were designed by 3M for Chrysler in 1999 for the 100% failure rate interference Neon 2.0l engines.
https://www.3m.com/3M/en_US/p/d/b40064937/
Jebby
I dont use spray on Fiber Felpro gaskets. Just put them on dry.
Last edited by 0311 jarhead; Aug 17, 2021 at 12:00 PM.
Dr. Detroit
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Le Mans Master
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I was thinking he meant valve SEALS. but who knows. And seals can be changed with heads in place.
However, I thought I would chime in on this thread as soon I am going to be putting on the Fel-Pro .015 shim head gaskets with Aluminium heads. I have done a bit of reading on this. And yes almost everyone says to spray them with copper gasket seal. However, I've been finding a mix of thoughts on the need to go back and re torque the gaskets.
Looking for thoughts on that. is it necessary to re torque the heads and if so after what time interval?
However, I thought I would chime in on this thread as soon I am going to be putting on the Fel-Pro .015 shim head gaskets with Aluminium heads. I have done a bit of reading on this. And yes almost everyone says to spray them with copper gasket seal. However, I've been finding a mix of thoughts on the need to go back and re torque the gaskets.
Looking for thoughts on that. is it necessary to re torque the heads and if so after what time interval?
the gasket cannot compress so I don’t see why it would be necessary.
Last edited by REELAV8R; Aug 17, 2021 at 03:51 PM.
Dr. Detroit
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Jebby
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Where's the blue coating?? Those look like the basic rebuilder gaskets? Haven't seen that either...especially with the "good" blue coated gaskets that have been around forever. What part number??
When you say you checked block and head flatness....what did you use? Was a feeler gauge inserted under straightedge? Any clearance?
JIM
When you say you checked block and head flatness....what did you use? Was a feeler gauge inserted under straightedge? Any clearance?
JIM