/ Register

  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Help Stuck Piston(moto guzzi 500)

Discussion in 'Maintenance' started by Gizziracer, Sep 19, 2022.

  1. Gizziracer

    Gizziracer Well-Known Member Contributing Member

    Messages:
    387
    Likes Received:
    251
    Trophy Points:
    273
    Joined:
    May 7, 2017
    Location:
    Sydney
    My Bike:
    Honda vt 250 spada
    6FD8C4AF-8F27-428A-B380-67449C8B611C.jpeg The piston is jammed solid in my latest acquisition, a 1989 Moto Guzzi 500cc Monza.. So far I’ve it soaking in penetrating oil , lightly tapped with a wooden drift and hammer.. absolutely no movement…. Apparently this bike hasn’t run for somewhere between 15 to 20 years…. The engine internals look very good but sadly bone dry..
    Any one have any brilliant ideas?
     
    Gizziracer, Sep 19, 2022
    #1
  2. Gen

    Gen Well-Known Member

    Messages:
    326
    Likes Received:
    333
    Trophy Points:
    273
    Joined:
    Aug 16, 2014
    Gender:
    Male
    Location:
    50 K's from South Australia, in NSW
    My Bike:
    blown CBR250r
    Try going in from the bottom, remove the crank, , do what you have already done, then wait, try twisting the conrod after a couple of weeks (carefully back & forward), the rings are rusted to the bores, by the sounds of it.
     
    Gen, Sep 19, 2022
    #2
  3. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

    Messages:
    5,108
    Likes Received:
    3,477
    Trophy Points:
    1,148
    Joined:
    Dec 23, 2012
    Gender:
    Male
    Location:
    Thailand
    Home Page:
    My Bike:
    Yamaha FZR400 3TJ1, Honda MC22
    Heat. If you get the cylinder warm enough it will probably let go.
     
    • Like Like x 1
    maelstrom, Sep 19, 2022
    #3
  4. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

    Messages:
    6,400
    Likes Received:
    4,788
    Trophy Points:
    1,148
    Joined:
    May 4, 2013
    Gender:
    Male
    Occupation:
    Retired
    Location:
    Tamworth, NSW
    My Bike:
    1937 Royal Enfield 250, CF Moto 250 V5, Honda's XL250, CBR250, FT500 plus a few others.
    Boiling olive oil dumped onto the piston top to heat the piston and tap with wooden drift when cooled.
     
    • Like Like x 2
    Murdo, Sep 20, 2022
    #4

Share This Page