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Thread: Head Gasket

  1. #1
    Luke Skywalker KVH's Avatar
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    Head Gasket

    I'm getting ready to reinstall my cylinder head with a new head gasket. It all seems so familiar. It also seems so simple. Are there any pointers I should remember? I plan to use no gasket sealing material. I have a new gasket from Moss and all looks fine. ARP head bolts, and I will torque spec.

  2. #2
    Jedi Trainee
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    Re: Head Gasket

    Not all gaskets are manufactured correctly......Check that there is no intrusion at all of the edge of the gasket into the combustion chamber.

  3. #3
    Jedi Knight
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    Re: Head Gasket

    Most head gaskets look like they will fit with either side up or down. My opinion is that the side with the fold exposed should go on the top. I have had two fail over the years because water got into that fold when the fold was on the block side.
    Charley

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    Luke Skywalker trrdster2000's Avatar
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    Re: Head Gasket

    Coat both sides with cooper head gasket spray. Why take a chance?

    Wayne


    '37 MG TA, '49 Triumph Roadster, '70 TR6, 2000 Jaguar XK8, '78 Spit6

  5. #5
    Jedi Knight
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    Re: Head Gasket

    I can't argue with Wayne but if everything is in spec, e.g. liner heights correct, head flat, etc. the Copper gasket spray is probably not needed. However, the only down side I can think of using it is that it might make future head removal a bit more difficult.
    Tom
    1960 TR3A TS73117 (under restoration year 6, owned since 1964)
    1959 TR3A TS58023 (in case I never finish the one above)
    1969 Triumph Herald 13/60 (a whim)
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  6. #6
    Yoda CJD's Avatar
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    Re: Head Gasket

    I've been using the original Wellseal. I was sold when I heard it was developed to hold 3k horsepower in the Mustang Merlin engine! Currently you have to order it from the U.K., though.
    John

    1955 TR2

  7. #7
    Yoda martx-5's Avatar
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    Re: Head Gasket

    Quote Originally Posted by CJD View Post
    I've been using the original Wellseal. I was sold when I heard it was developed to hold 3k horsepower in the Mustang Merlin engine! Currently you have to order it from the U.K., though.
    Is the Wellseal that's available here different than the stuff in the UK?? Pegasus shows it in stock. Not cheap, and there are shipping restrictions and costs. Pretty hazardous stuff it seems. I have a tube that I used during the resto, and I didn't send away to the UK for it, but that was a few years ago. I don't remember where I got if from.

    https://www.pegasusautoracing.com/productselection.asp?Product=3304

    Art
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  8. #8
    Jedi Warrior RJS's Avatar
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    Re: Head Gasket

    I did my head gasket this summer. Original copper gasket didn't fail. I had a cracked head stud which needed to be replaced - went with ARP head studs.

    No coating on old copper gasket and head lifted clean off.

    I have 87mm pistons and shaved head with 180psi compression. Went with the Lucas gasket with silicone (touted as last gasket you'll ever need) which handles up to 89mm pistons. I super cleaned head and block deck incl several wipes with acetone.

    Installed gasket dry and torqued to 110 lbs-ft (per ARP) in five stages over five days. Retorqued again after first 20 min heat cycle and good as gold.

    Bob

  9. #9
    Luke Skywalker KVH's Avatar
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    Re: Head Gasket

    Quote Originally Posted by RJS View Post
    I did my head gasket this summer. Original copper gasket didn't fail. I had a cracked head stud which needed to be replaced - went with ARP head studs.

    No coating on old copper gasket and head lifted clean off.

    I have 87mm pistons and shaved head with 180psi compression. Went with the Lucas gasket with silicone (touted as last gasket you'll ever need) which handles up to 89mm pistons. I super cleaned head and block deck incl several wipes with acetone.

    Installed gasket dry and torqued to 110 lbs-ft (per ARP) in five stages over five days. Retorqued again after first 20 min heat cycle and good as gold.

    Bob
    You're saying that after 20 minutes of start up you removed the valve cover and rocker arm assembly and re-torqued? I thought that was only after the first 500 miles? No?

  10. #10
    Jedi Warrior RJS's Avatar
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    Re: Head Gasket

    Yep, exactly what I did. And will check again at 500 miles.

    Bob

  11. #11
    Luke Skywalker KVH's Avatar
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    Re: Head Gasket

    Sounds good. But you must be really efficient at tappet adjustments. I slog through that for an hour each time.

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