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valve clearances and which shims needed

Discussion in 'XJ Technical Chat' started by mrdawson, Aug 29, 2015.

  1. mrdawson

    mrdawson Active Member

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    Got around to popping out the shims... here's what I have.
    [​IMG]
    The shim on intake #2 I could find no markings for, but came out to 2.80mm when measured (so this is a y-280 shim yes?). Likewise #3 intake was veeeery faded but pretty sure it said 290 and when measured came to 2.90mm
    intake #2...[​IMG]

    As for shims needed:
    [​IMG]
    meaning... need to replace with 260 on exhaust #1
    275 on intake 1
    exhaust 2 is good
    275 on intake 2
    250 on exhaust 3
    285 on intake 3
    255 on exhaust 4
    intake 4 is good.

    Sound right?
     
    mrdawson, Aug 29, 2015
    #1
  2. tabaka45

    tabaka45 Well-Known Member

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    Looks correct to me.
     
    tabaka45, Aug 29, 2015
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  3. BruceB

    BruceB Active Member

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    BruceB, Aug 29, 2015
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  4. mrdawson

    mrdawson Active Member

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    Thanks again
     
    mrdawson, Aug 29, 2015
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  5. XJ550H

    XJ550H Well-Known Member Premium Member

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    your caliper is not intended to measure a shim in the middle of the shim its good measuring field is at the tips where the fingers are ground down measure the edges for better accuracy.
     
    XJ550H, Aug 29, 2015
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  6. mrdawson

    mrdawson Active Member

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    I agree. I did remeasure all the others and they did match up however. Ie. y-265 = 2.65mm etc.
     
    mrdawson, Aug 30, 2015
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  7. Stumplifter

    Stumplifter Well-Known Member

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    If you want to get really anal you will notice that a fist full of 265's (or whatever size) measured with a micrometer are not all the same size.
    I have personally 'gone this far' last time I adjusted my valves. :confused:

    Mr. Dawson, where in the great state of cheese are you from?
     
    Stumplifter, Aug 30, 2015
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  8. mrdawson

    mrdawson Active Member

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    Eau Claire, WI
     
    mrdawson, Aug 30, 2015
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  9. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Thankfully the shims are harder than the cam lobes, so they will remain flat essentially forever. Measuring with a caliper is more than sufficient to figure the size of a shim.
     
    k-moe, Aug 30, 2015
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  10. mrdawson

    mrdawson Active Member

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    Agreed. I assume Chacal is the man to be in touch with regarding shims?
     
    mrdawson, Aug 30, 2015
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  11. rocs82650

    rocs82650 Well-Known Member

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    Chacal or member Hogfiddles (he runs a shim pool). He'll probably chime in and give you the details. Hope this helps.

    Gary H.
     
    rocs82650, Aug 30, 2015
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  12. Stumplifter

    Stumplifter Well-Known Member

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    Except for us anal retentive over-thinkers! :oops:

    Eau Claire - I'm gonna be relocating just south of Tomahawk later this year, we will almost be neighbors. Would love to meet up and do a ride into the driftless area - watch for a post in the Central US and Canada area next spring.
     
    Stumplifter, Aug 30, 2015
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  13. mrdawson

    mrdawson Active Member

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    Once it's all up and running at some point sure yea.
     
    mrdawson, Aug 30, 2015
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  14. Polock

    Polock Well-Known Member

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    where did this nonsense come from? the angled tips are for measuring the wall of a tube.
     
    Polock, Aug 30, 2015
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  15. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    And of a hole. And of your nostrils if you're bored.
     
    k-moe, Aug 30, 2015
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