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Gasket surface bump...

Discussion in 'The Garage' started by JE4570, Aug 20, 2019.

  1. JE4570

    JE4570 XS650 Addict

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    Hello,
    I am getting closer and closer to finishing up my rebuild. Today I was cleaning up my gasket surface on the head and noticed a bump on the gasket surface just above my exhaust valve. My head is nice and flat. (checked with a feeler guage) I must have done it while putting my valves back together. Its not huge but it is in what looks to be close to a critical spot. I plan on using the copper gasket spray.
    Is this bump life threatening?
    FB9489BD-77C2-444D-BCD8-98DA73BD7F6D.jpeg AC6D2E76-E825-4737-A4F6-23F973223C1A.jpeg
     
    gggGary and Jim like this.
  2. 5twins

    5twins XS650 Guru Top Contributor

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    The gasket doesn't reach out that far. It goes on the raised portion to the rear in your 1st pic, the part with all the little "nicks" and the groove. So, that ding won't affect sealing, it's not on the sealing or gasket area.
     
    grizld1, gggGary and JE4570 like this.
  3. JE4570

    JE4570 XS650 Addict

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    Thank you, thats a relief!

    Will using just the copper gasket spray on the gasket be all that is needed for sealing this surface? I think I read somewhere that sealer can be applied to the outside, but I didn’t see that in jims rebuild thread. Im using the vesrah kit btw.
     
  4. 5twins

    5twins XS650 Guru Top Contributor

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    Yes, the spray is all you need. Spray both sides of the gasket of course. I'd do the base gasket too.
     
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  5. Jim

    Jim People will come Ray, people will definately come. Top Contributor XS650.com Supporter

    The copper spray is a sealer. You could add additional sealer if you wanted, but it's not necessary... the copper does fine by itself.
     
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  6. JE4570

    JE4570 XS650 Addict

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    Do the base gasket with copper spray as well? Thats all I would need for that as well?
     
    gggGary likes this.
  7. Jim

    Jim People will come Ray, people will definately come. Top Contributor XS650.com Supporter

    The spray is a gasket sealer... so yes, it would work anywhere a gasket sealer is needed. The difference with the spray is that it contains flakes of copper. This (theoretically) improves heat transfer.
     
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  8. JE4570

    JE4570 XS650 Addict

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    Ohhhh ok.... that make sense I’ll give the copper spray a go for both gaskets then. Thanks for the quick replies guys. I appreciate it.
     
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