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Thread: 4bd1t fan belt

  1. #1
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    4bd1t fan belt

    Hello All

    Would anyone be able to tell me the part number for a fan belt for a 4bd1t ?
    I would have had it matched but it is laying on the road somewhere.
    Thanks Gary

  2. #2
    Bearman's Avatar
    Bearman is offline TopicToaster Gold Subscriber
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    G'day Gary, The standard Isuzu part number is 1136713400. If your motor is a standard unmolested one that should be the one. Another number I have here is BX45 (aftermarket number I think). Hope this helps.
    Cheers......Brian
    1985 110 V8 County
    1998 110 Perentie GS Cargo 6X6 ARN 202516 (Brutus)

  3. #3
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    I've got my spare on front of me and its a 15A1185.
    I got it from my local Jap truck spared place and I'm sure I asked him for the belt for 4BD1T ( mine was a NA stage1 engine and it definitely fits that).

    Steve
    1985 County - Isuzu 4bd1 with HX30W turbo, LT95, 255/85-16 KM2's
    1988 120 with rust and potential
    1999 300tdi 130 single cab - "stock as bro"
    2003 D2a Td5 - the boss's daily drive

  4. #4
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    Gday Brian and Steve. Thanks for the reply, I will try those numbers and see how I go.

    Cheers Gary

  5. #5
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    Quote Originally Posted by Bearman View Post
    G'day Gary, The standard Isuzu part number is 1136713400. If your motor is a standard unmolested one that should be the one. Another number I have here is BX45 (aftermarket number I think). Hope this helps.
    Quote Originally Posted by steveG View Post
    I've got my spare on front of me and its a 15A1185.
    I got it from my local Jap truck spared place and I'm sure I asked him for the belt for 4BD1T ( mine was a NA stage1 engine and it definitely fits that).

    Steve
    They are 'B' section belts.

    Now part number BX45, is suspiciously like 'B' section x 45 inches length.

    And 15A1185, could be 15mm wide x 1185 mm length.

    45 inches = 1143 mm
    1185 mm = 46.65 inch

    So those lengths are probably close enough that either might fit with the adjustment available at the alternator. Just my guessing though.

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