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Valve cover gasket RTV

Discussion in 'XJ Technical Chat' started by vashtsdaytona, Jul 25, 2020.

  1. vashtsdaytona

    vashtsdaytona Active Member

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    Are you guys doing RTV on your valve cover gasket? I think by convention a little would go in the corners of the half moon.

    Are you guys doing that? More? None?
     
    vashtsdaytona, Jul 25, 2020
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  2. JCH

    JCH Active Member

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    I put a little bit around the half moon rubber seals and lightly grease the gasket with some silicone grease.
     
    JCH, Jul 26, 2020
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  3. Franz

    Franz Well-Known Member

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    Yes round the semicircle.
     
    Franz, Jul 26, 2020
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  4. XJ550H

    XJ550H Well-Known Member Premium Member

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    XJ550H, Jul 26, 2020
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  5. vashtsdaytona

    vashtsdaytona Active Member

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    Follow up. This new gasket from Yamaha. These gaps supposed to be here? I don't have old gasket anymore to compare. Not pinched or rolled. Just no rubber there. This gap exists on both sides
     

    Attached Files:

    vashtsdaytona, Jul 26, 2020
    #5
  6. vashtsdaytona

    vashtsdaytona Active Member

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    vashtsdaytona, Jul 26, 2020
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  7. AG650

    AG650 New Member

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    I just received a new rubber valve cover gasket from Len at XJ4Ever (great service, by the way) and installed it earlier today. Just used the tacky spray to hold it in place on my 1982 XJ650 RJC Seca. Will let you know how things hold together once I put engine back in frame and fire it up. See attached pic of reassembled engine.

    Regards,
    Andrew

    Bikes:
    1982 XJ650RJC SECA
    1982 Honda CB900C (Custom)
     

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    AG650, Jul 26, 2020
    #7
  8. vashtsdaytona

    vashtsdaytona Active Member

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    How about the gap I pictured?
     
    vashtsdaytona, Jul 26, 2020
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  9. vashtsdaytona

    vashtsdaytona Active Member

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    After looking at more reference photos I think gap is normal and that must be blind hole under there
     
    vashtsdaytona, Jul 26, 2020
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  10. Mezzmo

    Mezzmo Active Member

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    That gap is normal, its a blind hole on the outside and the gasket seals on the inside edge. Nothing to worry about....
     
    Mezzmo, Jul 27, 2020
    #10
  11. XJ550H

    XJ550H Well-Known Member Premium Member

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    cam covers should be checked for warpage when replacing gasket
     
    XJ550H, Jul 27, 2020
    #11

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