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Thread: Adjusting 4m valve clearance (HOW TO?)

  1. #1
    Junior Member 1st year Apprentice 4age_fun's Avatar
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    Default Adjusting 4m valve clearance (HOW TO?)

    I'm slowly fixing up this MS65 crown I purchased a month ago and I am after any information on adjusting valve clearances. The more detailed the advise the better

  2. #2
    Yep they look great Carport Converter gianttomato's Avatar
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    Default Re: Adjusting 4m valve clearance (HOW TO?)

    Warm up engine and turn off.
    Remove rocker cover.
    Turn cylinder to TDC with both valves closed.
    Undo lock nut and back off adjustment screw.
    Slide appropriate thickness feeler gauge between adjustment screw and valve tip.
    Nip up adjustment screw so that feeler gauge is just grippy.
    Tighten lock nut taking care not to tighten the adjustment screw.
    Check with feeler gauge.
    Repeat for other rocker, same cylinder.

    Repeat process for other 5 cylinders.

    Someone can chime in with correct hot valve clearances for intake and exhaust.

  3. #3
    Senior Citizen Chief Engine Builder "Z" UTE's Avatar
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    Default Re: Adjusting 4m valve clearance (HOW TO?)

    Valve clearances are .006" intake and .008" exhaust. Engine has to be warm, as Gianttomato has said.

    Toools required:

    10mm socket to remove rocker cover nuts,

    Feeler guages,

    12mm ring spanner, and

    a flat blade screwdriver.

    cheers Chuck.
    "What man can build, man can fix!"
    MS51Crown Coupe,
    GSV40R Aurion luxo tourer. One TA22 currently receiving some TLC prior to paint One RS56 Crown ute under construction, 2 x TA22's awaiting rebuilds. Toyota Crown RS47J ute in need of serious TLC. Toyota Crown Custom Wagon MS53 daily hauler stocko!

  4. #4
    Junior Member 1st year Apprentice 4age_fun's Avatar
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    Default Re: Adjusting 4m valve clearance (HOW TO?)

    Perfect thanks!

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