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Head gasket replacement

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Sheldy, May 21, 2020.

  1. May 21, 2020 #1
    Sheldy

    Sheldy Bobtail Member

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    May 21, 2020
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    I had a head gasket blow on a Cat C7 engine. I had the head rebuilt and reinstalled it now I can't get the valve cover to stop leaking. It seems to have to much oil pressure under the valve cover. Does anyone have a answer for that?
     
    Sheldy, May 21, 2020
    Sheldy, May 21, 2020
    #1
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  3. May 21, 2020 #2
    lester

    lester Midwest's #1 Feed Hauler

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    I don't know anything about a C7 but a valve cover doesn't have oil pressure under it per say. Sure pressurized oil gets sprayed around inside it but the cover itself isn't pressurized unless it's not vented. Guess I'd start by replacing the valve cover gasket
     
    lester, May 21, 2020
    lester, May 21, 2020
    #2
  4. May 21, 2020 #3
    Stang

    Stang Bobtail Member

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    Is it leaking on the exhaust side, towards the back of the engine? If it is, the VC gasket wasn't trimmed properly, and that's where the two ends overlap. It's a fairly common mistake.
     
    Stang, May 21, 2020
    Stang, May 21, 2020
    #3
    baha Thanks this.
  5. May 21, 2020 #4
    AModelCat

    AModelCat Road Train Member

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    If you re-used the valve cover gasket, start by replacing it.
     
    AModelCat, May 21, 2020
    AModelCat, May 21, 2020
    #4
  7. May 21, 2020 #5
    ibcalm19

    ibcalm19 Road Train Member

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    If it is coming from the valve cover you more than likely crimped the gasket when putting the valve cover back on. Remove the cover & check it to make sure it is seated properly.
     
    ibcalm19, May 21, 2020
    ibcalm19, May 21, 2020
    #5
    Bean Jr. Thanks this.
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