Just Commodores Forum Community

It takes just a moment to join our fantastic community

Register

cometic head gasket for pre-ecotec

Discussion in 'V6 Development And Modification' started by Matt_vp, Oct 13, 2008.

  1. Matt_vp

    Matt_vp Donating Member

    Messages:
    651
    Likes Received:
    9
    Trophy Points:
    0
    Joined:
    Jan 1, 2006
    Location:
    Gladstone Qld
    Members Ride:
    vy lumina v6 A4
    Does anyone know if your able to get cometic head gaskets for the pre ecotec motors, i rang rocket ind. but they said that u can only get them for ecotecs.
    cheers Matt
     
  2. immortality

    immortality Moderator Staff Member

    Messages:
    13,061
    Likes Received:
    1,501
    Trophy Points:
    113
    Joined:
    Apr 15, 2006
    Location:
    Sth Auck, NZ
    Members Ride:
    HSV VS Senator, VX s2 Calais S/C
    they are available. check the cometic web site

    Gasket Image

    i think this is the ones you want
     
  3. Matt_vp

    Matt_vp Donating Member

    Messages:
    651
    Likes Received:
    9
    Trophy Points:
    0
    Joined:
    Jan 1, 2006
    Location:
    Gladstone Qld
    Members Ride:
    vy lumina v6 A4
    I found them, a place called serco in qld sell them, they are $156 each.
    yay boosting again soon.
    Matt
     
  4. immortality

    immortality Moderator Staff Member

    Messages:
    13,061
    Likes Received:
    1,501
    Trophy Points:
    113
    Joined:
    Apr 15, 2006
    Location:
    Sth Auck, NZ
    Members Ride:
    HSV VS Senator, VX s2 Calais S/C
    sweet. let us know how they go. i'm of two minds on what gaskets i'm going to use. i like the fact that the factory head gaskets are the weak link and will fail before something more serious fails. i was considering standard gaskets with some arp headstuds to get a more accurate seal across the standard gaskets. failing that maybe i'll go cometic
     
  5. Matt_vp

    Matt_vp Donating Member

    Messages:
    651
    Likes Received:
    9
    Trophy Points:
    0
    Joined:
    Jan 1, 2006
    Location:
    Gladstone Qld
    Members Ride:
    vy lumina v6 A4
    a mate (eaton v8 on here) put them on his vr v8 with a eaton 112 blower running 12psi and they have held up so far. I got the .065 ones so ill let u know how they go.
    But the standard ones held up to 10 psi on mine the bottom end let go first, it wasn't untill i got rid of my restive intake pipe with thousands of dodgy bends and made a nice smooth one that goes in the drivers side, that i started getting 14psi and i didnt notice till it was 2 late, was raining and traction was a problem.
    Matt
     
  6. eaton v8

    eaton v8 my little sleeper

    Messages:
    608
    Likes Received:
    1
    Trophy Points:
    0
    Joined:
    Jun 6, 2008
    Location:
    gladstone qld
    Members Ride:
    vz 6l auto 239cam 3.9diff
    i have had no problems with mine and if two boilermakers can put them on and they dont fail id say they are user friendly its all too easy to use them. matt how many diffrences in thickness did they have for them?
     
  7. Matt_vp

    Matt_vp Donating Member

    Messages:
    651
    Likes Received:
    9
    Trophy Points:
    0
    Joined:
    Jan 1, 2006
    Location:
    Gladstone Qld
    Members Ride:
    vy lumina v6 A4
    only 2 they had .040'' or .065''
    Matt
     
  8. immortality

    immortality Moderator Staff Member

    Messages:
    13,061
    Likes Received:
    1,501
    Trophy Points:
    113
    Joined:
    Apr 15, 2006
    Location:
    Sth Auck, NZ
    Members Ride:
    HSV VS Senator, VX s2 Calais S/C
    what are the standard gaskets?
     
  9. Matt_vp

    Matt_vp Donating Member

    Messages:
    651
    Likes Received:
    9
    Trophy Points:
    0
    Joined:
    Jan 1, 2006
    Location:
    Gladstone Qld
    Members Ride:
    vy lumina v6 A4
    don't know i just went for the thickest cometic one they had.
    Matt
     
  10. eaton v8

    eaton v8 my little sleeper

    Messages:
    608
    Likes Received:
    1
    Trophy Points:
    0
    Joined:
    Jun 6, 2008
    Location:
    gladstone qld
    Members Ride:
    vz 6l auto 239cam 3.9diff
    .040 is standerd on v8 thats the one i went i should have gone .065 but hey it works and its no problems with 12psi
     
  11. 300kwv6

    300kwv6 Member

    Messages:
    44
    Likes Received:
    0
    Trophy Points:
    6
    Joined:
    Apr 8, 2008
    Members Ride:
    L67
    Hi Guys,

    I'm considering using the cometic head gaskets instead of the copper ones.
    I've heard that the cometic ones are good for blocks that are not o-ringed. I also read of the cometic gaskets that have gas filled wire that expands when heated up, but apparently they aren't available for the v6 engines though.

    Does anyone have any part numbers??

    Cheers
     
  12. Matt_vp

    Matt_vp Donating Member

    Messages:
    651
    Likes Received:
    9
    Trophy Points:
    0
    Joined:
    Jan 1, 2006
    Location:
    Gladstone Qld
    Members Ride:
    vy lumina v6 A4
  13. 300kwv6

    300kwv6 Member

    Messages:
    44
    Likes Received:
    0
    Trophy Points:
    6
    Joined:
    Apr 8, 2008
    Members Ride:
    L67
    Cheers, ringing them now. Hopefully they can get them in 1.6mm
     
  14. Pub247

    Pub247 Well-Known Member

    Messages:
    3,372
    Likes Received:
    56
    Trophy Points:
    48
    Joined:
    Apr 14, 2006
    Location:
    Melbourne S.E.
    Members Ride:
    Ford Fairmont
    They dont have gas filled wire. With cometics you really need well prepared surfaces to get a good seal. Copperheads dont really so they're good for when you just want to do the gaskets. You DON'T have to o-ring blocks or heads for coppers. You gotta make sure that you bed them in properly andand retorque head bolts and make sure your tune is good because it doesnt matter how good your gaskewt is if you got a **** tune it'll still go bang.

    You can get early buick mls gasket from america. ACL do mls gaskets for l67 i'm not sure if cometic actually do any themselves
     
  15. 300kwv6

    300kwv6 Member

    Messages:
    44
    Likes Received:
    0
    Trophy Points:
    6
    Joined:
    Apr 8, 2008
    Members Ride:
    L67
    Cometic do make gas filled wire gaskets, but like I said they arn't available for the V6's. I read it was due to the bores being quite close together.

    Here' the link Phuzion Gaskets

    Cheers
     
  16. vn calais manual

    vn calais manual New Member

    Messages:
    785
    Likes Received:
    2
    Trophy Points:
    0
    Joined:
    Jun 22, 2005
    Members Ride:
    vn calais, vs clubsport #137
    im also curious about this. let me know how u fair.
     
  17. Pub247

    Pub247 Well-Known Member

    Messages:
    3,372
    Likes Received:
    56
    Trophy Points:
    48
    Joined:
    Apr 14, 2006
    Location:
    Melbourne S.E.
    Members Ride:
    Ford Fairmont
    actually if you read that it says cometics dont have gas filled rings those o-rings are seperate. And it wouldnt be that the bores are too close together they no closer than other motors that run mls gaskets. I'd say its more about demand for certain products.
    Like I said you can get MLS gasket for buicks theyre available in america
     
  18. 300kwv6

    300kwv6 Member

    Messages:
    44
    Likes Received:
    0
    Trophy Points:
    6
    Joined:
    Apr 8, 2008
    Members Ride:
    L67
    Just for peoples reference the Cometic part number for vn-vr v6's is C5691. They are available in both .040 and .065" at a price of $156 each just like MattVP said.

    They guy I spoke to said not to use hylomar on the gaskets as they are already coated with something called viton. Has anyone had experience with these before?

    Cheers
     
  19. 300kwv6

    300kwv6 Member

    Messages:
    44
    Likes Received:
    0
    Trophy Points:
    6
    Joined:
    Apr 8, 2008
    Members Ride:
    L67
    Looks like they were right. This is from the Cometic FAQ.

    Why does Cometic recommend MLS gaskets to be installed dry?

    Cometic Multi-Layer Steel (MLS) head gaskets go on dry because they are coated with a sealant. Each MLS head gasket is coated with a .001" thick viton rubber that is bonded to the outer stainless steel layers. Adding an additional sealer can hinder the performance of an MLS head gasket.
     
  20. Pub247

    Pub247 Well-Known Member

    Messages:
    3,372
    Likes Received:
    56
    Trophy Points:
    48
    Joined:
    Apr 14, 2006
    Location:
    Melbourne S.E.
    Members Ride:
    Ford Fairmont
    Yeah thats right you use hylomar on copperhead gaskets not mls gaskets
     

Share This Page