Cometic head gasket weeping coolant, should i fix it or do i ignore it.

Discussion in 'Technical' started by ZEDZY, Jun 27, 2010.

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  1. ZEDZY

    ZEDZY Active Member

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    Im taking the engine out to fix a boost leak at the turbo so nows the best time.

    Let me know what you think.
     
    ZEDZY, Jun 27, 2010
    #1
  2. beaver

    beaver southern zeds

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    You don't

    have to take the engine out to fix a boost leak in front of the compressor, the clamp on the outlet pipe's from the compressor's can be tightened in situ, any hoses on the out let pipe's can be go to with the engine in. A leaking/weeping H/G is another story, that has to be repaired.
     
    beaver, Jun 27, 2010
    #2
  3. larlok

    larlok Member

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    fix the coolant leak asap because things like that never get better it will only get worse, so it can be done now or later when things have worsened and possible overheat issues to follow.

    Joe
     
    larlok, Jun 27, 2010
    #3
  4. ZEDZY

    ZEDZY Active Member

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    Its not a lot of coolant, only about 10c coins worth around the gasket, ill have to check again.
     
    ZEDZY, Jun 27, 2010
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  5. Anton

    Anton New Member

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    who put the gasket in and how long ago? what head bolts were used? was any head gasket spray used and were the heads and block shaved?

    I'm still trying to decide if I should use a cometic or not
     
    Anton, Jun 27, 2010
    #5
  6. WazTTed

    WazTTed Grease Monkey

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    leaking gasket.. put any decent boost through it will instantly fail !!! pull that engine down mate only option
     
    WazTTed, Jun 27, 2010
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  7. MagicMike

    MagicMike Moderator Staff Member

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    Oem headgaskets ftw
     
    MagicMike, Jun 27, 2010
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  8. Cra-Z-Boy

    Cra-Z-Boy no nissan at all :(

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    like Mike says OEM all the way
     
    Cra-Z-Boy, Jun 27, 2010
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  9. ZEDZY

    ZEDZY Active Member

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    I could use OEM, but i worry about my compression ratio being to high.
    Ive taken about a 1mm off the heads, and a fraction off the block.
     
    ZEDZY, Jun 30, 2010
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  10. rollin

    rollin First 9

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    i wouldnt use oem on a big hp build if youve taken that much off the head and block.
     
    rollin, Jun 30, 2010
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  11. a2zed

    a2zed Guest

    There is no other choice in my opinion.
     
    a2zed, Jun 30, 2010
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  12. ZEDZY

    ZEDZY Active Member

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    Im sure the car will be ok.
     
    ZEDZY, Jun 30, 2010
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  13. rollin

    rollin First 9

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    did u guys use OEM gaskets on Drokks build?
     
    rollin, Jun 30, 2010
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  14. a2zed

    a2zed Guest

    Yes.
     
    a2zed, Jun 30, 2010
    #14
  15. Adamness

    Adamness Active Member

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    This concerns me as I have cometic headgaskets to put on my engine...
     
    Adamness, Jun 30, 2010
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  16. a2zed

    a2zed Guest

    The block needs to be machined to Cometics exact requirements, if it isn't it will leak. There is nothing wrong with the gaskets themselves, they are just very sensitive to incorrect machining and installation.

    Imho, I would rather not build potential issues into an engine by using parts that have a very large margin for error. The OEM head gasket is a very good piece, not too many people need to look past this part in a build.
     
    a2zed, Jun 30, 2010
    #16
  17. rob260

    rob260 Administrator Staff Member

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    tomei
     
    rob260, Jun 30, 2010
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  18. WLDTTZ

    WLDTTZ URBAN LEGEND

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    what about copper head gaskets by ACL ?

    Are stock head gaskets good enuff for 380/400 RWK ?
     
    WLDTTZ, Jun 30, 2010
    #18
  19. rob260

    rob260 Administrator Staff Member

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    Dunno re power, piston size is probably your first consideration?

    Not familiar with copper gaskets, I thought they were generally used with o rings?
     
    rob260, Jun 30, 2010
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  20. WLDTTZ

    WLDTTZ URBAN LEGEND

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    Piston size ?

    as for the copper gaskets a member on here told me he had ACL remake every gasket on the VG out of copper including head gaskets
     
    WLDTTZ, Jun 30, 2010
    #20
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