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Thread: Valve steam seal identification

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    1st ever COTM and COTY verified Feedback Score 9 (100%) green-lantern's Avatar
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    Valve steam seal identification

    I'm getting ready to install VSS and I have an old head lying around so I thought I would practice and check out the seals on them. When I pulled the seals I found the numbers on the top said 25 and 22, one for intake and one for exhaust. I have some seals from a gasket kit I bought from cherry hill a while back. I have a set of 25's and the other set says 17. Cherry hill shows 3 different types, one for exhaust, one for intake and one that doesn't say what they are for other than valve seal.

    Do the 17's fit? Anybody done this recently than can shed some light on this?

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    1st ever COTM and COTY verified Feedback Score 9 (100%) green-lantern's Avatar
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    OK, they appear to have all different numbers. I just happen to have pulled the same number off that I had already out of the bag. I wonder what the number is supposed to mean?

    So can anybody tell me the colors of the seals? It appears green is exhaust.

  3. #3
    1st ever COTM and COTY verified Feedback Score 9 (100%) green-lantern's Avatar
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    OK after some digging I found this.


    Valve Stem Seal Identification On
    2000-02 Mitsubishi 3.0L VIN H Engines

    AERA members have reported a difficulty correctly identifying valve stem seals on 2000-02 Mitsubishi VIN H engines. To properly identify the two different valve stem seals, Mitsubishi has color-coded the seals.

    Upon removing the valve seals from the packaging, there may not be any identification sheet with the seals. This leaves the machinist wondering which seal goes on the intake valve and which one on the exhaust valve. To correctly install these seals, the one with charcoal gray identification color goes on the exhaust and the one with the green identification color goes on the intake.

    Color Location Part #

    Charcoal Gray Exhaust MD184303
    Green Intake MD307342
    Edit: This doesn't appear to be right. I have had three people tell me it's the other way around.

    This should be right.
    Intake = Charcoal grey
    Exhaust = Green


    btw sorry about the typo in the title.
    Last edited by green-lantern; 04-04-2011 at 03:09 PM.

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