YD Engine cylinder Head differences

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    • March 30, 2016 at 1:23 pm #45983
      kenotractors
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        Any of you guys know the difference between YD cylinder heads stamped with YD1, YD2, YD3 and YD4?

        I have had a few different issues with valves seeming to be different in some of these heads.  I think it may have something to do with the angle on the valve.

        Just wondering if anyone has had this issue before.

         

        Tyler Nystrom
        Keno Tractors
        parts@kenotractors.com
        866-363-8193
        Phone hours: M-F 8am to 5:30pm PST Sat 9am to 1pm PST

      • March 31, 2016 at 12:23 pm #45991
        Bob Rooks
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          Not at all familiar with that engine, but the differences in the valves could be:

          Different face angles (3 or 4 angles).

          Different materials – stellite and/or sodium cooled exhaust valves.

          Different stem diameters.

          Replaceable guides.

          Different type of rotators.

          Head diameters.

          The list could be long.

          Account deleted.

        • April 1, 2016 at 1:01 pm #45994
          kenotractors
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            I was thinking different face angles,  took both intake and exhaust valves out and they are the same length.

            Once you put them in the head, exhaust valve sits a little bit lower then the intake valves, on all 3 cylinders.

            Tyler Nystrom
            Keno Tractors
            parts@kenotractors.com
            866-363-8193
            Phone hours: M-F 8am to 5:30pm PST Sat 9am to 1pm PST

          • April 2, 2016 at 12:43 pm #45998
            Bob Rooks
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              Did you try bluing the seats to see where the contact point is on the valve face?

              Account deleted.

            • April 8, 2016 at 10:43 am #46013
              kenotractors
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                No we didn’t try that, should’ve!  But the engine was sold, so we just put a new head on it.  A YD2 head.  Worked just fine….  Just kind of a head scratcher.

                 

                Tyler Nystrom
                Keno Tractors
                parts@kenotractors.com
                866-363-8193
                Phone hours: M-F 8am to 5:30pm PST Sat 9am to 1pm PST

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