Loading…

YD Engine cylinder Head differences

Forum Forums Tractor/Dozer Engines YD Engine cylinder Head differences

This topic contains 4 replies, has 2 voices, and was last updated by kenotractors kenotractors 1 year, 8 months ago.

  • Author
    Posts
  • #45983
    kenotractors
    kenotractors
    Participant
    • Offline

    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.

     

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

  • #45991
    Bob Rooks
    Bob Rooks
    Participant
    • Offline

    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.

    Yuchai dozer, Mustang skid steer, Mitsubishi mini-ex, Dual Dozer w/twin laser receivers, '50 Ford COE transit mixer.

  • #45994
    kenotractors
    kenotractors
    Participant
    • Offline

    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.

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

  • #45998
    Bob Rooks
    Bob Rooks
    Participant
    • Offline

    Did you try bluing the seats to see where the contact point is on the valve face?

    Yuchai dozer, Mustang skid steer, Mitsubishi mini-ex, Dual Dozer w/twin laser receivers, '50 Ford COE transit mixer.

  • #46013
    kenotractors
    kenotractors
    Participant
    • Offline

    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.

     

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

You must be logged in to reply to this topic.