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Breaking-in an engine

  • 16-01-2011 8:23am
    #1
    Gixerboy
    Registered Users, Registered Users 2 Posts: 47 ✭


    Don't know if the same applies to both bikes and cars

    It's recommended to run the engine hard to break in a bike,.. and to get oil/oil filter change sooner than recommended,.. to bed in piston seals and wear off metal shavings,.. then to change oil cos you don't want those shavings going through your engine too long
    Even in the manual says not to leave on constant revs for too long,.. try explaining that to a garda !!

    Same story for car,.. should you break it in hard or should you be gentle and keep the revs down for first 1000 km ??


Comments

  • #2
    Owen
    Registered Users, Registered Users 2 Posts: 12,683 ✭✭✭✭Owen


    Completely dependent on the manufacturer. Some run engines in on benches before you buy them, some dont.


  • #3
    Seweryn
    Registered Users, Registered Users 2 Posts: 4,499 ✭✭✭Seweryn


    Gixerboy wrote: »
    Same story for car,.. should you break it in hard or should you be gentle and keep the revs down for first 1000 km ??
    Do it very gently. Start the new engine (after making sure that the oil pressure is full) on mineral oil and let it idle for 20-30 min, then change the oil and filter, drive it gently in a city cycle preferably (no motorways) still using mineral oil for another 1-2k km and then change oil again and drive another 2-3k km gently and finally change to your synthetic oil.
    That is what I would do.

    All the above is for an engine after complete overhaul. If you are running-in a new car, it is a bit different story, but do it gentle anyway and just read the manufacturer's recommendations / owner's manual...


  • #4
    Owen
    Registered Users, Registered Users 2 Posts: 12,683 ✭✭✭✭Owen


    Recommending Mineral Oil is a bad idea - you don't know what engine the OP has - it can cause a lot of issues with newer engines.

    OP, read the owners manual, simple as.


  • #5
    Seweryn
    Registered Users, Registered Users 2 Posts: 4,499 ✭✭✭Seweryn


    PaintDoctor wrote: »
    Recommending Mineral Oil is a bad idea - you don't know what engine the OP has - it can cause a lot of issues with newer engines.

    OP, read the owners manual, simple as.
    Yeah, as I said I am not sure if we are talking about a brand new car or a refurbished (older) engine. If it is a new car, I would read the manual first.


  • #6
    Mr.David
    Registered Users, Registered Users 2 Posts: 1,704 ✭✭✭Mr.David


    Why would you use mineral oil? Not disagreeing just curious!


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  • #7
    Seweryn
    Registered Users, Registered Users 2 Posts: 4,499 ✭✭✭Seweryn


    Mr.David wrote: »
    Why would you use mineral oil? Not disagreeing just curious!
    Parts are easier to break-in in a shorter period of time.


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