and it was still running - LMAO

Discussion in 'Mechanic and Repair' started by SuperPROlawnScalper, Sep 11, 2010.

  1. SuperPROlawnScalper

    SuperPROlawnScalper LawnSite Member
    Posts: 60

    exmark lazer z 60" 27hp kohler

    omg i can't believe this thing was still running, let alone cutting tall thick grass like a tank.
    look at that damn spark plug, how was it even sparking

    other than using oil, backfiring was only indication something was wrong.
    figure with the hole in the valve it would have been backfiring a lot, but it wasnt

    i let the guys at the shop hear it. they thought maybe a bent rod. get it apart and it looked like this.

    2 blown head gaskets
    1 head is able to be cleaned
    other head needs replaced

    1st 2 pics are of each cylinder
    pic 3 and 4 are the junk head
    last pic of the new head

    IMG_1429.jpg

    IMG_1430.jpg

    IMG_1431.jpg

    IMG_1432.jpg

    IMG_1433.jpg
     
  2. SuperPROlawnScalper

    SuperPROlawnScalper LawnSite Member
    Posts: 60

    some carbon that fell into the cylinder when the bad head was removed

    IMG_1434.jpg
     
  3. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,024

    Obviously, It was only running on half a one cylinder...... ;)
     
  4. SuperPROlawnScalper

    SuperPROlawnScalper LawnSite Member
    Posts: 60

    that's what i thought too, just amazes me what this machine would do running on one cylinder
    i can't wait till it's done so i can try it out - they're waiting on valves to come in
     
  5. unkownfl

    unkownfl LawnSite Gold Member
    Posts: 3,838

    Why didn't they just fix that head? You should clean the carbon off once in awhile with some water man. LOL little late now though.
     
  6. SuperPROlawnScalper

    SuperPROlawnScalper LawnSite Member
    Posts: 60

    what do you mean clean it off with water
     
  7. USFGUY

    USFGUY LawnSite Member
    Posts: 59

    or diesel... old mechanics trick.. running engine.. slowly pour in diesel till engine dies... let sit overnight.. restart in morning.. will be hard to start and smoke like crazy but it does clean out the carbon. :)
     
  8. SuperPROlawnScalper

    SuperPROlawnScalper LawnSite Member
    Posts: 60

    where do you pour the diesel, in the carb?

    they said the carbon buildup was from blown head gasket
    i guessing that water/diesel wouldn't help in this situation

    what is the water/diesel trick for, preventative maintenance ?
     
  9. cgaengineer

    cgaengineer LawnSite Fanatic
    Posts: 15,782

    I would never do this. The reason this seems to work is 2 days later anyone doing this is rebuilding the engine. Never pour liquid into a running engine.
    Posted via Mobile Device
     
  10. USFGUY

    USFGUY LawnSite Member
    Posts: 59

    I've done it for years. Never on a fuel injected engine though.
    Seafoam http://www.seafoamsales.com/how-to-use-sea-foam-motor-treatment.html still says to slowly pour 1/3 to 1/2 a can into a running motor to clean carbon.

    Many people recommend water for cleaning out carbon but the one time I tried it, it didn't work but the diesel did.

    Then again there are tons of old "tricks" that work but probally are not that good for the engine. Like pouring some ATF in the oil pan to quiet lifter noise. :)
     

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