Exhaust gaskets
#1
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Joined: Jan 2022
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From: West Michigan
Had to remove the exhaust again and the f'n exhaust gasket appears to have become one with the aluminum heads. Is there something I can apply to the gasket so it doesn't stick as much or at all? Maybe a gasket recommendation that doesn't stick as much? Any reservations on using a 90 degree pneumatic tool with the red scotch pad to remove the gasket? Thanks for your help.
#2
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Joined: Aug 2019
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From: BC
We need some pics!!!
Aluminum is soft. Don't use scotch pad rotary tooling on sensitve hasketed surfaces.
I've only ever.used Hi-Temp Red silicone to seal the exh manifolds to the heads. Only need a little bit, or it squishes out and into the port.
You need resonanle.surface qualities to do it, but solves the issues of exh gasket problems.
There are fiber gaskets that will likely work better than the metalic style exh man gaskets.
To clean up the port mating surfece, use a straigt edge block like a file... with some rolled crocus cloth sand paper.
Aluminum is soft. Don't use scotch pad rotary tooling on sensitve hasketed surfaces.
I've only ever.used Hi-Temp Red silicone to seal the exh manifolds to the heads. Only need a little bit, or it squishes out and into the port.
You need resonanle.surface qualities to do it, but solves the issues of exh gasket problems.
There are fiber gaskets that will likely work better than the metalic style exh man gaskets.
To clean up the port mating surfece, use a straigt edge block like a file... with some rolled crocus cloth sand paper.
#3
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Registered
Joined: Jan 2022
Posts: 710
Likes: 209
From: West Michigan
We need some pics!!!
Aluminum is soft. Don't use scotch pad rotary tooling on sensitve hasketed surfaces.
I've only ever.used Hi-Temp Red silicone to seal the exh manifolds to the heads. Only need a little bit, or it squishes out and into the port.
You need resonanle.surface qualities to do it, but solves the issues of exh gasket problems.
There are fiber gaskets that will likely work better than the metalic style exh man gaskets.
To clean up the port mating surfece, use a straigt edge block like a file... with some rolled crocus cloth sand paper.
Aluminum is soft. Don't use scotch pad rotary tooling on sensitve hasketed surfaces.
I've only ever.used Hi-Temp Red silicone to seal the exh manifolds to the heads. Only need a little bit, or it squishes out and into the port.
You need resonanle.surface qualities to do it, but solves the issues of exh gasket problems.
There are fiber gaskets that will likely work better than the metalic style exh man gaskets.
To clean up the port mating surfece, use a straigt edge block like a file... with some rolled crocus cloth sand paper.
Thanks again for your help.



#5
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Joined: Jan 2022
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From: West Michigan
I was wondering if you could coat the gaskets with something. Do you think the gaskets I have would release with anti seize applied?
#6
are you saying put permatex red on your exhaust gaskets AND antiseize? I never use any sealer on exhaust gaskets or surfaces unless I had no gasket at all and there was no other option. I use felpro premium or Mr gasket ultra seals on my dyno too with anti seize on both sides and am.able to reuse them on about 15 engines before they start deteriorating as long as there tightened evenly and not ran loose or leaking.
#7
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are you saying put permatex red on your exhaust gaskets AND antiseize? I never use any sealer on exhaust gaskets or surfaces unless I had no gasket at all and there was no other option. I use felpro premium or Mr gasket ultra seals on my dyno too with anti seize on both sides and am.able to reuse them on about 15 engines before they start deteriorating as long as there tightened evenly and not ran loose or leaking.
I was given Cometic MLS ex gaskets with my engine. Any thoughts on those? Thanks
#8
I use the silver stuff, seems like the copper high temp doesnt work as well when it theoretically should work better. so are your cometic mls exhaust gaskets just pure metal?
#9
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Joined: Oct 2005
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From: Waldorf, Md
I have found that using a single edge razor blade in a holder works good. Most of the time if you get it started under one edge they will come off pretty easily.
#10
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Joined: Aug 2019
Posts: 1,218
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From: BC
On aluminum a razor will take off a lot of metal if you get the angle wrong. I've had good luck with well setup metal putty scrapers etc. While also using razors where easy going.


