Stump The Technician...Name That Failure,,,

Discussion in 'Mechanic and Repair' started by piston slapper, Dec 3, 2012.

  1. 04cubcadet3235

    04cubcadet3235 LawnSite Member
    Posts: 61

    i bought one of those chinese (copycat honda) 6.5 hp motors to see if they hold up and tried to blow it up also since it wasn't even $100 , so i bent the tab back on the throttle by pushing it very hard towards the air filter and i let it sit there with no air filter and watery oil at probably 9,000 rpm and i mean 9,000 rpm because it was screaming for about 15 min, didn't blow up so i took it apart and everything was perfect and the cams had almost no wear at all. ps.. did i mention i also threw bits of pieces of grass and dirt in that 15 min in the intake. It started up first pull the next day and i wondered why it didnt blow up so i took it apart, it was perfect.
     
  2. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    If you're gonna blow it up....do it right....
    Drain the oil first...then run it wide open...then ...slowly pour sand in the carb..with an occasional pebble..
     
  3. 04cubcadet3235

    04cubcadet3235 LawnSite Member
    Posts: 61

    dont forget the nos! :laugh:
     
  4. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    Question #BR549. ...engine...Kaw FH500

    Condition...Fresh rebuild...less than 1 hr runtime..
    New rods..pistons..rings..crank..cam..and all gaskets and seals..

    Situation...After the initial run in and tuning...upon checking the oil...there was a silver sheen on the dipstik and metal flakes in the oil...

    Name That Failure..

    A)...Rods overtorqued..
    B)...Engine block not properly cleaned after crosshatching the cylinders..
    C)...All Mobil 1 oil in silver bottles has a silver sheen in it..
    D)...Silver rebuilding paint got sprayed inside the engine..
    E)...Not a problem...all new engines turn the oil silver with metal flakes..
     
  5. 04cubcadet3235

    04cubcadet3235 LawnSite Member
    Posts: 61

    i would have to go with B. engine block not cleaned properly after cylinder crosshatching??? and i right??
     
  6. kymowboy

    kymowboy LawnSite Member
    Posts: 64

    Leanng toward E but it depends on the size and number of the flakes. Thats why they cally it "break in", all the little pieces getting broken off.
     
  7. BigFish

    BigFish LawnSite Gold Member
    Posts: 3,174

    You would B right!
     
  8. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    Ok...you guys got it right....took you long enuf..:waving:
     
  9. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    Question #BR548. Engine...Kohler CV730

    Condition....New engine..under 10 hours...leaking and using oil...head gasket problem

    Situation...After having the head gasket replaced under warranty...now..not only is the engine still using and leaking oil from the head gasket...but there is also a hissing noise coming from the gasket...

    Name That Failure

    A)..Block dished out while cleaning the gasket area with a die grinder..new engine block ruined..
    B)...Head bolts tightened with impact gun...stripped out threads in the block...new engine block ruined..
    C)...The old head gasket still looked ok...so it was re used...
    D)...Newly hired ace mechanic talks a better engine than he builds..
    E)...Cyl head dished out while cleaning the gasket area with a die grinder...head out of flat.
    F)...Head gasket never replaced...shop just filed the warranty and pocketed the money.
    G)...Any of these could be the right answer...
     
  10. BigFish

    BigFish LawnSite Gold Member
    Posts: 3,174

    I know the answer................not nice! Ya want some of my meds? I'll trade ya fer some of them there Tampa Bay ribs...........

    Gotta love them Rolocs!!
     

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