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1G Are these exhaust valves toast?

Posted by tk106, Feb 21, 2019

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  1. tk106

    tk106 Proven Member

    897
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    Joined Sep 11, 2017
    Cincinnati, Ohio
    Should I bother trying to lap these?
    3B64E64A-D019-4CDE-8E69-FCBC4250ABA8.jpeg
     

    Street Build 1K  8

    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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  2. Kryndon

    Kryndon Proven Member

    295
    113
    Joined Jan 10, 2014
    Bulgaria, Europe
    I actually can't see from the blur, is that pitting or carbon buildup? If carbon, try a brass wire wheel or scotch brite + drill method.

    If it's deep pitting I'd say have them re-ground. Margins look healthy so it should be machine-able. Trying to lap them like that might still leave a few pitts here and there which is a no-go.
     

    Street Build 3K  9

    1997 Eagle Talon TSi AWD
    14.769 @ 92.22 · 2G DSM
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  3. tk106

    tk106 Proven Member

    897
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    Joined Sep 11, 2017
    Cincinnati, Ohio
    Thanks Kryndon! I used drill on brass wire wheel. They’re pitted but not deep, maybe 1mm.
    Re-ground is done by machine shop?
    Idk if this pictures is any better.
    26674FBE-4014-4932-B798-A63592F320C5.jpeg
     

    Street Build 1K  8

    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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  4. arrowhead

    arrowhead Proven Member

    570
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    Joined Apr 19, 2011
    miami, Florida
    They seem to be too far gone, if machine would leave a very thin margin.
    You must also look at seats, probably as bad.
     

    Road Race Build 2K  0

    1998 Eagle Talon TSi
    manual · 2G DSM
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  5. tk106

    tk106 Proven Member

    897
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    Joined Sep 11, 2017
    Cincinnati, Ohio
    Seats aren’t bad

    41369658-81A2-4F7E-842A-B21684A9630C.jpeg
     

    Street Build 1K  8

    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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  6. motomattx

    motomattx Proven Member

    1,459
    370
    Joined Dec 9, 2010
    wampum, Pennsylvania
    I would toss those, if your on a budget a automotive machine shop can reface them.
     

    Drag Race Build 2K  14

    1995 Mitsubishi Eclipse GST
    fwd · manual · 2G DSM
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  7. tk106

    tk106 Proven Member

    897
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    Joined Sep 11, 2017
    Cincinnati, Ohio
    Thanks Matt!
     

    Street Build 1K  8

    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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  8. Bud92gsx

    Bud92gsx Proven Member

    7,953
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    Wisconsin, Wisconsin
    Or engnbldr on Ebay sells legit OEM plus oversize valves and guides. That's what I used when I rebuilt my head. Great prices great dudes to deal with.
     

    4K  13  14

    1992 Mitsubishi Eclipse GSX
    13.300 @ 102.400 · 1G DSM
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  9. tk106

    tk106 Proven Member

    897
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    Joined Sep 11, 2017
    Cincinnati, Ohio
    Thanks Bud! I’ll be searching the web tomorrow.
     

    Street Build 1K  8

    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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  10. Bud92gsx

    Bud92gsx Proven Member

    7,953
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    Wisconsin, Wisconsin
    Here is his email actually. engnbldr@engnbldr.com
    Wink
     

    4K  13  14

    1992 Mitsubishi Eclipse GSX
    13.300 @ 102.400 · 1G DSM
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  11. tk106

    tk106 Proven Member

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    Cincinnati, Ohio
    I couldn’t find them on eBay. I’ll shoot them an email tomorrow.
    Thanks again Bud!!
     

    Street Build 1K  8

    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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    Bud92gsx likes this.
  12. tk106

    tk106 Proven Member

    897
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    Joined Sep 11, 2017
    Cincinnati, Ohio

    Street Build 1K  8

    1992 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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