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Thread: Lapping Compound?

  1. #1
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    Lapping Compound?

    Is there any danger in using valve grinding compound to lap scope rings?

    800 grit?

    I am out of the stuff sold for lapping rings.

    Thanks
    Last edited by John S; 06-25-2022 at 11:15 AM.

  2. #2
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    Go to the auto parts store and get some valve lapping compound. 800X? you don't have enough life left to lap them with the 800X

  3. #3
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    Quote Originally Posted by Butch Lambert View Post
    Go to the auto parts store and get some valve lapping compound. 800X? you don't have enough life left to lap them with the 800X
    320?

  4. #4
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    180-240 You are not polishing them.

  5. #5
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    Thank you.

  6. #6
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    Ok, maybe this should be on the humor forum.

    I go into the local chain auto parts store and ask the nice young man behind the counter if they had any valve grinding compound. He starts typing away and asks what make, model and year of car I had. I started laughing so hard I almost fell over. Made me feel bad, but could not help myself.

    I had walked the isles looking for little green cans of Glover compound, but never found any. What they had was a tube of Permatex valve grinding compound. Nowhere on the packaging or tube does it call out the grit. I bought it anyway and have retreated to my cave.

    Just found out this little tube has 122, 150, 180 and 220 all in the same tube!
    Last edited by John S; 06-25-2022 at 03:27 PM.

  7. #7
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    brownells sells small plastic jars in various grits

  8. #8
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    Quote Originally Posted by John S View Post
    Ok, maybe this should be on the humor forum.

    I go into the local chain auto parts store and ask the nice young man behind the counter if they had any valve grinding compound. He starts typing away and asks what make, model and year of car I had. I started laughing so hard I almost fell over. Made me feel bad, but could not help myself.

    I had walked the isles looking for little green cans of Glover compound, but never found any. What they had was a tube of Permatex valve grinding compound. Nowhere on the packaging or tube does it call out the grit. I bought it anyway and have retreated to my cave.

    Just found out this little tube has 122, 150, 180 and 220 all in the same tube!
    kinda' like the old Hurters Do-All 12ga loads eh.....3" mag with a Uni-Wad and 1-1/2oz of #8-#6-#4 and #2's....

    din't need no buffer! it done buffered itsownself

  9. #9
    Join Date
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    Surprise, AZ
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    Quote Originally Posted by John S View Post
    Ok, maybe this should be on the humor forum.

    I go into the local chain auto parts store and ask the nice young man behind the counter if they had any valve grinding compound. He starts typing away and asks what make, model and year of car I had. I started laughing so hard I almost fell over. Made me feel bad, but could not help myself.

    I had walked the isles looking for little green cans of Glover compound, but never found any. What they had was a tube of Permatex valve grinding compound. Nowhere on the packaging or tube does it call out the grit. I bought it anyway and have retreated to my cave.

    Just found out this little tube has 122, 150, 180 and 220 all in the same tube!
    I had almost the opposite discussion yesterday - the fellow at the auto parts store said the lady ahead of me had been worried because the windshield washer fluid did say that it 'fit' a Toyota on it...

    GsT

  10. #10
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    If you're bedding the rings after lapping, the Permatex valve grinding compound gives an excellent finish for the bedding compound.

    Good shootin' -Al
    Last edited by Al Nyhus; 06-27-2022 at 08:02 AM.

  11. #11
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    Quote Originally Posted by GeneT View Post
    I had almost the opposite discussion yesterday - the fellow at the auto parts store said the lady ahead of me had been worried because the windshield washer fluid did say that it 'fit' a Toyota on it...

    GsT
    Lady ahead of me in line was ordering a new dipstick because "this one doesn't reach the oil any more" and the tech behind the counter said "just have your mechanic trim an inch or so off your filler tube".......

  12. #12
    Join Date
    May 2010
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    83
    Quote Originally Posted by alinwa View Post
    Lady ahead of me in line was ordering a new dipstick because "this one doesn't reach the oil any more" and the tech behind the counter said "just have your mechanic trim an inch or so off your filler tube".......
    seriously ? I thought I heard everything. Shoulda asked her if she eats uber eats or tide pods. Ummm Al ? Why didn't you just have her buy oil and fill it for her ?

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