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To much oil and knocking lower end

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    #1

    To much oil and knocking lower end

    Guy had a 83 GS750 T that has a knock in the lower end and wanted me to take a listen. Started and sure enough a clunk down below. I looked at the sight glass after smelling the oil ( which didn't smell of gas).

    Sight glass was full, so I took the mighty vac and started sucking oil out of the filler hole by inserting the suction hose to the bottom. After removing THREE full quarts, the oil was still over full in the window, so I got a drain pan...took another 5 quarts out AFTER having removed the previous 3!! Yes folks, that's nearly 8 quarts of oil out of the engine!!!!!!!

    So , obviously, the over filling has hammered something. I am thinking a bent rod or a piston skirt . What say you guys?
    MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
    1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

    NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


    I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.
    Tags: None
    #2
    Chuck,
    I don't think too much oil could cause mechanical damage. Most likely the bike spun crank bearings. Fairly common on the 2nd generation 750 engine.
    Ed

    To measure is to know.

    Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182

    Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846

    Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf

    KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection

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      #3
      I'd vote for a rod or big end bearing.

      Comment

        #4
        Yeah that was my very first impression too, but then I thought about the impacting of the piston at the bottom of a stroke slamming into the oil.

        Goona have to decide if he wants the cases split for a looksee I guess.
        MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
        1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

        NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


        I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

        Comment

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