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Thread: Cylinder head gasket

  1. #1
    Join Date
    Jun 2016
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    106

    Cylinder head gasket

    I removed my cylinder head the other day and the head gasket seems to be in three separate layers. Maybe a daft rookie question here but is it supposed to be like that or should it be one singular gasket?? I never had any problems when it was running with coolant or oil leakage.

  2. #2
    Join Date
    Jun 2014
    Location
    Norf East
    Posts
    7,278

    Re: Cylinder head gasket

    Spooky is that Dougy as the only gaskets i have seen in layers are cometic (which are generally associated with big bore albeit they may make a standard one)


    Have just taken the head of Pinky with an oem gasket and it was indeed 1 piece/layer


    Might be worth measuring your bores sir
    What Goes Around..........!!!

  3. #3
    Join Date
    May 2011
    Location
    NORTHUMBERLAND UK
    Posts
    1,197

    Re: Cylinder head gasket

    Quote Originally Posted by Dougiethejambo View Post
    I removed my cylinder head the other day and the head gasket seems to be in three separate layers. Maybe a daft rookie question here but is it supposed to be like that or should it be one singular gasket?? I never had any problems when it was running with coolant or oil leakage.
    It is usual on many WATER COOLED head gaskets.
    They are often made of 2 outer surfaces which are different to the centre.
    This is for the 2 outer surfaces to mate / seal with metal / alloy faces and the centre for crush / seal purposes.
    I have removed many which have separated at the middle when the head is removed, leaving one surface on the head and the other on the top of the block.

    If nothing else, is shows the gasket did a good job when it was in place

    Pete
    THE OLDER I GET THE BETTER I WAS...................

  4. #4
    Join Date
    Jun 2016
    Posts
    106

    Re: Cylinder head gasket

    Just had a look at the cometic site and the gasket does look similar to the image and description they give for their gaskets.

    Hmm interesting, if only I knew how to measure my bores!!!

  5. #5
    Join Date
    Jun 2016
    Posts
    106

    Re: Cylinder head gasket

    Thanks for the info Pete, I'll just buy a new one then.

    Cheers

  6. #6
    Join Date
    Jun 2014
    Location
    Norf East
    Posts
    7,278

    Re: Cylinder head gasket

    Before you buy anything, check your bore size as even if they delaminate on removal, they look nothing like how a new Cometic one does (they are loose layered and held together with a rivet)


    If its an 11, standard bore is 76mm and bored to 1109 is 78mm


    If the head is off, even a steel rule should give you an indication but a vernier would be best


    That said, each layer on a Cometic gasket is metal/alloy with no sealing layers so a quick comparison or a pic would help.



    As an aside, why you take the head off sir?
    What Goes Around..........!!!

  7. #7
    Join Date
    Jun 2016
    Posts
    106

    Re: Cylinder head gasket

    Yeah mine are loose layered with gold looking rivets at the sides holding them together.

    I'll have a measure and see what size they are.
    Thanks Nige

  8. #8
    Join Date
    Jun 2016
    Posts
    106

    Re: Cylinder head gasket

    Took the head off for paint and one exhaust bolt that has beaten me, I'm going to have to send it to the machine shop

  9. #9
    Join Date
    Jun 2016
    Posts
    106

    Re: Cylinder head gasket

    I've posted some pics on the Facebook page couldn't upload them here

  10. #10
    Join Date
    May 2011
    Location
    NORTHUMBERLAND UK
    Posts
    1,197

    Re: Cylinder head gasket

    Dougie,

    When refitting the exhaust, use S/S Exhaust Studs and BRASS M8 nuts (off Ebay), as these will never seize together like the original mild steel ones do !

    Pete
    THE OLDER I GET THE BETTER I WAS...................

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