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  1. #1
    RC poster
    Join Date
    Aug 2016
    Posts
    1

    Unhappy New Piston & Sleeve

    Hello, I have a question about the New piston and sleeve. I have a revo 3.3 vehicle and I change the piston and sleeve parts of its engine. The problem is that I tried to rotate the engine manually but it did not work. The piston was stucked at upper point of the engine. In order to break-in, what am I suppose to do? I do not want to rotate it by using force because I am affraid it can break or something. Can you help me please? Thank you in advance.

  2. #2
    Marshal Double G's Avatar
    Join Date
    May 2008
    Posts
    13,393
    That is normal and due to the pinch of the sleeve. When you rebuilt the engine did you make sure the cut-out on the piston faces the carb as well as the oiler holes on the rod? The relief cuts on the back plate need to face up.
    To help it slide a little easier I've put Marvel Mystery oil on the parts during assembly. Or squirt a little WD-40 down the plug hole and spin the engine without the plug in.
    The Super Derecho

  3. #3
    RC Competitor
    Join Date
    Dec 2006
    Location
    Raleigh, NC
    Posts
    96
    Heating it up with a hair dryer before starting will help too.

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