Broken Camshaft on a 20 h.p. OHV Liquid Cooled Kaw?????

Discussion in 'Mechanic and Repair' started by Nitrousoxide764, Feb 15, 2004.

  1. GreenTurf

    GreenTurf LawnSite Member
    from NJ
    Posts: 41

    A good place you guys might want to check for parts is www.j-thomas.com. They have alot of parts for Kawasaki engines. A great place to buy a new kawaski engine would be from www.alamia.com. They have cheap prices and free shipping on engines
     
  2. ducky1

    ducky1 LawnSite Senior Member
    Posts: 252

    Nitrous, here are the specs you were wanting. These are in inch pounds instead of foot pounds.
    Head bolts first round is 115 in. lbs.
    final round is 186 in. lbs.
    Rod caps are 186 in. lbs.
    Water pump bolts is 70 in. lbs.
    case cover is 186 in. lbs.
    Valve clearance is .010 for both intake and exhaust
    If you dont have a in. lb. wrench you can divide these by 12 and it will give you the foot pounts torque. The book showed tightening the bolts in a stagered pattern. good luck
     
  3. Nitrousoxide764

    Nitrousoxide764 LawnSite Member
    from Georgia
    Posts: 24

    Thank you very much Ducky. I'll keep you posted.
     
  4. Nitrousoxide764

    Nitrousoxide764 LawnSite Member
    from Georgia
    Posts: 24

    UPDATE! UPDATE!

    Got the engine apart. It was a broken cam gear and it is plastic and it is in a MILLION little pieces. No valve train damage. Pistons and cylinders look great for the machine having 2000 hours. Should be a pretty straight forward and reasonably priced repair. What kills me is how wormy the inside of this kawasaki looks. I mean ALL the gears are plastic. Water pump drive, oil pump drive, and of course the broken cam gear. This mower was like $9,000 or so when new. You would think for that kind of money one would get all metal parts wouldn't you? Oh well, just venting I guess. Thanks for everyone's help with my first visit to the inside of a water cooled kawasaki.
     
  5. grass_cuttin_fool

    grass_cuttin_fool LawnSite Gold Member
    Posts: 3,503

    I can understand your thinking in a way about the plastic gears.But 2000 hours isnt to shabby and if they were metal then you would have metal shavings floating around in the engine and possibly doing damage, but then again if they were metal , maybe they would of lasted more than 2000 hours
     
  6. ducky1

    ducky1 LawnSite Senior Member
    Posts: 252

    If the gears were metal the engine probably would not run quite so quiet either. Glad you found the problem. Kaw did go back to a metal gear on the new cams. Probably having a little trouble with the plastic ones.
     
  7. Nitrousoxide764

    Nitrousoxide764 LawnSite Member
    from Georgia
    Posts: 24

    Thanks for everyone's help. Got the mower running a few days ago. Cuts grass fine. Ended up getting the updated cam with steel gear from J.D., new standard rings(just honed the block), and complete gasket set. Engine smokes a few seconds on startup. I'm thinking I should have bored it and installed new pistions. But I swear it hardly had any wear for having 2000 hours. I figured I would be fine with just a hone job. Oh well. live and learn. If I think about it I will post pics. of the borken cam shaft. See ya'!
     
  8. grass_cuttin_fool

    grass_cuttin_fool LawnSite Gold Member
    Posts: 3,503

    Maybe after a few hours of running the rings will wear to the block and the smoking will stop
     
  9. Nitrousoxide764

    Nitrousoxide764 LawnSite Member
    from Georgia
    Posts: 24

    Grass cuttin............so far I only have about an hour on the budget rebuild. I have to admitt that the smoking has gotten much better than when I initially first ran it. It smoked like crazy for several minutes. After an hour's run time, it smokes for about 10 seconds on a cold start up. The top ring in my ring kit was shiny chrome and the next ring was black. Some people have said that this chrome ring may take a while to break in................ like you said. Then others say it should be broken in within a few seconds of cranking up. Who to believe? Anyone have somethin' to add. See ya'll!!
     
  10. I've got a deere with a kawaski 17hp...... It rattles and vibrates like everything........
     

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