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Thread: 4BD1 valve clearances

  1. 22nd June 2010, 12:38 PM #1
    87County's Avatar
    87County
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    4BD1 valve clearances

    Further to my earlier question

    Is there a generality as to whether valve clearances increase or decrease over time and use ?
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  2. 22nd June 2010, 02:13 PM #2
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    justinc
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    Well, they can decrease due to valve seat recession / wear caused by excessive KM or dusting of the engine... or they can increase due to wear in the valve train.
    I have adjusted my Izuzu ones only 3 times, and IMHO was almost unnecessary. 0.45mm from memory. (Edit: 16 thou , .40mm, is factory spec)


    JC
    The Isuzu 110. Solid and as dependable as a rock, coming soon with auto box😊
    The Range Rover L322 4.4.TTDV8 ....probably won't bother with the remap..😈
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  3. 22nd June 2010, 03:14 PM #3
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    87County
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    the first tme I adjusted mine they were 25thou - prev owner was either being very cautious or there haad been wear in the system ...
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« 4BD1 Valve Clearance Adjustment Question | Stage1 4bd1 into 110 »

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