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Thread: Honing New Mahle Cylinders

  1. 11-17-2018, 04:57 AM #1
    Saskia
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    Honing New Mahle Cylinders

    I have new Nikasil Mahle cylinders and new CP Carrillo pistons. CP state in their generic literature that cylinders should be "grape honed". However, the literature does not state if this needs to be done to new high quality cylinders. Does anyone have a view on this please?Thanks.
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  2. 11-17-2018, 05:33 AM #2
    uai
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    No new Nikasil cylinder should be honed.
    Flex honing is usually done to used cast iron cylinders before getting a new set of piston rings or new pistons.
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  3. 11-17-2018, 08:41 AM #3
    Saskia
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    Thanks for the reply. Most helpful. My feeling was that new Mahle Nikasil cylinders should not be honed.
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  4. 11-19-2018, 09:17 PM #4
    raspy2point2
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    honing would likely remove the Nikasil.
    1. Chris-Early S Registry#205
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  5. 11-20-2018, 01:13 AM #5
    uai
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    Nikasil Cylinders are being lapped with diamond paste or honed with diamond compound during manufacturing.
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  6. 11-20-2018, 08:39 AM #6
    Saskia
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    Thank you for the further contributions and reinforcing what I had assumed.
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  7. 11-20-2018, 09:48 AM #7
    gled49
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    U shouldn't hone new cylinders, but I've honed many used cylinders with a flex hone with boron content. It takes a lot to break thru the plating on a Mahle cylinder. The big problem is they go out of round, no flex hone can help that.
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  8. 11-20-2018, 10:02 AM #8
    Saskia
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    Thanks Gled49.
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