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  1. #1
    Ski Hacks MG's Avatar
    Join Date
    Apr 2013

    Proper break in on rebuilt (mostly new) engine a must?

    2004 GTX SC

    The 2010 pistons and 2009 valves are obviously slightly used but it will have all new rings, bearings and bolts as well as timing chain, gaskets, etc. Should I observe the proper "break in" procedure for new engines to give love to the new parts, specifically the bearings and rings?

    In my 25 years of motorsports, it has always been a gray topic.

  2. #2
    mikelytle1077's Avatar
    Join Date
    Sep 2010
    frisco, tx
    seadoo rings are plasma moly hone with a fine grit stone and the rings will usaully seat in the first heat cycle. use some standard 10-40 for the first 5hrs.

  3. +1 by:

  4. #3
    Moderator beerdart's Avatar
    Join Date
    Aug 2006
    A few heat cycles at different RPM,s then hammer down.

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