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Thread: 350x head question.

  1. #1
    Join Date
    Jul 2005
    Location
    az
    --
    1,949

    350x head question.

    on a 350x, since the head and valve cover is basically the cam bearing. Do they have to be kept as a set? I imagine the rocker cover is torqued to the head then the cam journal is align bored. So swapping the cover could cause a mismatch? jim
    81 185s
    82 185s with 85 200s motor
    suspended 185s
    85 atc70
    1984 200s
    85 350x 3rd owner
    and a 72 ct70

    projects coming along

    85 200s
    81 suspended 185s (can't believe I came across 2)
    1982? 185s

  2. #2
    Join Date
    Oct 2021
    Location
    North Carolina
    --
    11
    Yes, consider it a matched pair. You can polish them up and swap camshafts, just check tolerances. On a side note, Honda had exceptional quality control during this time period. I would not be surprised if you randomly paired a head and cover to find a match that is in tolerance. Case halves are swaped with success. When in doubt, measure. Plasti-guage and similar products are a breeze to use, and a cheap way to ease your mind.

  3. #3
    Join Date
    Dec 2009
    Location
    Nevada,MO
    --
    81
    Match pairs only on the head. The cases are a pretty good bet, but the head has to much going on. For those who remember "The Ultimate 350X" build that fell on its face..... The engine had mismatched head and cover. the next owner found that Bill just pulled the guide pins out to get the cam to turn.
    3 Wheelin' and 2 Strokin'

  4. #4
    Join Date
    Jul 2005
    Location
    az
    --
    1,949
    I ended up trading the head and cover for a suspended 185s. jim
    81 185s
    82 185s with 85 200s motor
    suspended 185s
    85 atc70
    1984 200s
    85 350x 3rd owner
    and a 72 ct70

    projects coming along

    85 200s
    81 suspended 185s (can't believe I came across 2)
    1982? 185s

  5. #5
    Join Date
    Apr 2014
    Location
    Edmond, KS
    --
    2,531
    That may have been a very good trade.

  6. #6
    Join Date
    Jul 2005
    Location
    az
    --
    1,949
    the head was basically a freebie, and the suspended 185s is in another post but runs, no smoke, just need to find a seat for it. jim
    81 185s
    82 185s with 85 200s motor
    suspended 185s
    85 atc70
    1984 200s
    85 350x 3rd owner
    and a 72 ct70

    projects coming along

    85 200s
    81 suspended 185s (can't believe I came across 2)
    1982? 185s

  7. #7
    Join Date
    Apr 2014
    Location
    Edmond, KS
    --
    2,531
    Oh yes. I've seen it. I do pay attention to those things. I'd love to build one someday. I think that I have most of the parts to build one, it's just finding the time and prioritzing it.

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