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  1. #1
    Bronze Member
    Join Date
    Jun 2004
    Posts
    87
    Location
    Vassalboro, Maine
    Tractor
    1981 Ford 1200

    Default Valve adjustment

    My ford 1200 2cyl, with 980 hours, is running a bit noisy. Yes, I know it was probably built that way to begin with. Anyway, I read in the operator's manual that adjusting the valves might quiet things down some. Is this something most of you do? It looks simple enough, remove cover and use a gauge to set gap and replace the cover. What should I be aware of before starting this.

    David

  2. #2
    Silver Member
    Join Date
    Sep 2001
    Posts
    123
    Location
    Kentucky (in the bluegrass!)
    Tractor
    Kioti LK3054, IH cub cadet 782, Grasshopper 721D2

    Default Re: Valve adjustment

    My JD 770 calls for the valves to be adjusted every 500 hrs. Remember that adjusting the valves will not only quiet things down, it will also bring ya a little more performance. Your right that it is a pretty simple operation, on mine I don't even need a new valve cover gasket as the one on there is a re-usable o-ring. Before adjusting the lash, make SURE the cylinder you're adjusting is on top dead center on the compression stroke. Adjust the lash to specs. and usually the adjustments are made on a cold engine. Have fun [img]/forums/images/graemlins/wink.gif[/img]

  3. #3
    Bronze Member
    Join Date
    Jun 2004
    Posts
    87
    Location
    Vassalboro, Maine
    Tractor
    1981 Ford 1200

    Default Re: Valve adjustment

    Thanks Zenmeck,
    My book says 600 hours. I just got the tractor and don't know if the adjustment was ever made. The dealer I bought from did most everything else before I bought it, new hoses, belts, fluids, filters. I guess it won't hurt to check it out.

  4. #4

    Join Date
    Aug 2002
    Posts
    7,386
    Location
    North East CT
    Tractor
    2003 Kubota BX-22

    Default Re: Valve adjustment

    Check all tappets before making any adjustments. If you find that they all but one are in spec, then just adjust that one. Measure twice and adjust once. Many times unexperienced people will make the adjustments and the machine will run worse as a result of this. Remove all the spark plugs when making the adjustments and locate the timing mark. The engine cylinder HAS to be on TDC (top dead center) to make the adjustment correctly.

  5. #5
    Gold Member
    Join Date
    Sep 2002
    Posts
    411
    Location
    So. Colorado
    Tractor
    Iseki TS1610F 4x4

    Default Re: Valve adjustment

    I always adjust the intake valve when the exhaust valve is full open, and vice versa. Is this close enough? The valve being adjusted has to be full closed when the other is full open, right?? Unless, of course, you're working on a high performance gas engine where the valves may overlap.

    Bill in CO

  6. #6

    Join Date
    Aug 2002
    Posts
    7,386
    Location
    North East CT
    Tractor
    2003 Kubota BX-22

    Default Re: Valve adjustment

    If the one that you are considering as being fully open is out of adjustment, then the other might not be fully closed. In this event, you would have to go back and readjust it. I always like to know that the cylinder is at TDC when making adjustments. There are many different techniques that people use and to say that one is right and one is wrong, it wrong. It is the end result that you are looking for. I had a friend show me how to adjust hydraulic lifter valve settings so they would all be correct when the engine is rebuilt. With his method, it is faster and more accurate.

  7. #7
    Bronze Member
    Join Date
    Jun 2004
    Posts
    87
    Location
    Vassalboro, Maine
    Tractor
    1981 Ford 1200

    Default Re: Valve adjustment

    I think I'll invite a friend over to walk me through the process this first time. The setting is the same on both sides so armed with a feeler gauge and new gasket we'll take a look. The real problem is letting the engine cool enough to work on it.

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