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Need help on engine

Discussion in 'Mechanic and Repair' started by just_some_dude, Aug 3, 2010.

  1. just_some_dude

    just_some_dude LawnSite Member
    Posts: 20

    It looks as though I should be able to replace the guide. It's a $25 part.

    The valve looks untouched. I think what happened... The guide got so hot it attached itself to the valve. When I pushed the valve back the guide broke a few pieces off. Just a guess, but ultimately I have no idea. Everything is in perfect condition, just the guide isn't in the best of shape.

    Here's the part description (look for part 14):

    http://jdpc.deere.com/jdpc/servlet/com.deere.u90490.partscatalog.view.servlets.HomePageServlet_Alt
     
  2. mowerknower

    mowerknower LawnSite Senior Member
    Posts: 766

    Good point, but judging this guys mechanical ability it might be better to just replace the head.
    Head msrp is 180. Looks like it is on backorder at all distributers (at least on the spec I guessed it was)
    Valve guide msrp is 21.49 and is available at the Grandrapids, Ontario (ca) and Atlanta distributers.
     
  3. bc3xx0

    bc3xx0 LawnSite Senior Member
    Posts: 305

    What ever he does with it, he should look into why it got so hot. May be running rich.
     
  4. mowerknower

    mowerknower LawnSite Senior Member
    Posts: 766

    Running lean is a more likely reason for the heat and by looking at the valve seat in that pic I would not think rich running. Could be a cooling fin.
     
  5. bc3xx0

    bc3xx0 LawnSite Senior Member
    Posts: 305

    Sure it could be fat!! He could be pumping so much fuel into it that its burning super hot in the exhaust!! He never said how it idled!!

    I just figured running lean would be to simple of an explanation cause I like to think outside the box.:usflag:


    Really, I don't know why I put down rich.
     
  6. just_some_dude

    just_some_dude LawnSite Member
    Posts: 20

    I'm not sure how it died. It was my father's and as far as I know it just wouldn't turn on one day. He took it to a local dealer that told him that he had a broken crank shaft. He didn't even think they even looked at it and of course they tried to sell him a new tractor. He took it home and it's been sitting there for a couple years. I told him I would go take it to get looked at for him, but instead he just gave it to me. I started taking it apart and that's when I obviously found the valve guide issue.

    There is no easy way to pull the guide out and put a new one in?
    Posted via Mobile Device
     
  7. betterlawnsandlandscaping

    betterlawnsandlandscaping LawnSite Senior Member
    Posts: 255

    Just so you know.... rich means more fuel and lean means less fuel:laughing::laughing:
    If it is getting more fuel, do you really think the exhaust temp is gonna be higher
     
  8. bc3xx0

    bc3xx0 LawnSite Senior Member
    Posts: 305

    Thanks for the lesson!! My "rich" was a mistake, I thought I mentioned that in my other post!! But you can get higher egt's out of an extremely rich a:f...... Just not likely!! Plus you'd notice the motor idling out of sorts!!
     

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