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08-29-2021, 02:37 PM
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#1 |
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Member
Join Date: Nov 2008
Posts: 306
Likes: 3
Liked 19 Times in 17 Posts
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Head gasket sealant
What's folks using for head gasket sealant? Never had any issues with leaking until recently. Had water in #2 and yesterday discovered #1 and #2 bubbling thru radiator. Same block and heads. Fixed water in cylinder, ran a couple races and now found bubbling. No water loss. Used shim gaskets with spray copper coat. Have been using it for years. Same process, clean surfaces, spray copper coat, torque accordingly. Has anyone had issues with copper coat?
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08-29-2021, 03:21 PM
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#2 |
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VIP Member
Join Date: Jun 2006
Posts: 3,416
Likes: 522
Liked 330 Times in 178 Posts
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Re: Head gasket sealant
We always used either Hylomar or Aluminum spray paint --with hylomar spray one coat on both sides let set for a few minutes (1-2) then install---with Alum paint spray both sides 3-4 light coats let dry til almost dry (3-4minutes) then install---- check both the block and head surfaces AND both sides of the gasket in that area for any SMALL scratches, nicks etc. that might be causing the problem too-FED 387
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08-29-2021, 04:14 PM
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#3 |
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Senior Member
Join Date: Feb 2002
Location: Southeast Michigan
Posts: 909
Likes: 70
Liked 239 Times in 114 Posts
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Re: Head gasket sealant
Are they new shim gaskets or reused gaskets with copper coat ?
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08-29-2021, 06:14 PM
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#4 | |
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Member
Join Date: Nov 2008
Posts: 306
Likes: 3
Liked 19 Times in 17 Posts
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Re: Head gasket sealant
Quote:
I remember dad using aluminum paint sometimes too when he didn't have copper coat. Seemed to work pretty well too. |
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08-29-2021, 11:05 PM
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#5 |
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VIP Member
Join Date: Dec 2001
Location: phoenix
Posts: 1,486
Likes: 66
Liked 704 Times in 281 Posts
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Re: Head gasket sealant
Copper coat has worked well for me. 12 to 1 and 175 HP nitrous. No problems
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08-30-2021, 11:56 AM
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#6 |
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VIP Member
Join Date: Mar 2007
Posts: 2,444
Likes: 613
Liked 1,916 Times in 574 Posts
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Re: Head gasket sealant
Sounds like you need to check the deck and head surfaces to make sure they are flat. Typically copper coat and shim gaskets is a good combo if everything is smooth and flat.
__________________
Mike Pearson 2485 SS |
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08-30-2021, 12:12 PM
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#7 |
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Member
Join Date: Feb 2005
Location: San Antonio
Posts: 119
Likes: 1
Liked 48 Times in 18 Posts
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Re: Head gasket sealant
VHT copper spray is better than all of the others
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08-30-2021, 12:58 PM
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#8 |
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Member
Join Date: Oct 2017
Location: Bay City Texas
Posts: 388
Likes: 2
Liked 225 Times in 136 Posts
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Re: Head gasket sealant
Coppercoat best all time!
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