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Thread: isuzu diesels

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    isuzu diesels

    Isuzu have made a lot of decent diesel truck engines, is there a reason to use a 4BD1 or 4BD1-T as opposed to the 4HG1 and 4HF1 engines?

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    Quote Originally Posted by dobbo View Post
    Isuzu have made a lot of decent diesel truck engines, is there a reason to use a 4BD1 or 4BD1-T as opposed to the 4HG1 and 4HF1 engines?
    The main two reasons would be size and no electronic control.
    IIRC the 4H series are OHC which should make them taller than the pushrod 4B series.

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    JDNSW is offline RoverLord Silver Subscriber
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    Without being familiar with the other engines, I suspect the main reason would be fitting them in, with a secondary point being compatibility of the torque curve with available gear ratios.

    The 4BD1 is pretty much of a shoehorn job, and the major problem is likely to be engine height, with clearance on the bottom for the front axle housing and prop shaft while retaining the same crankshaft alignment. For example, the 4BD1 needed a different sump and oil filter setup.

    John
    John

    JDNSW
    1986 110 County 3.9 diesel
    1970 2a 109 2.25 petrol

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    Isuzu used to make a 3.5 litre six cylinder lightweight diesel engine for Thermo King who used it on their semi-trailer refrigeration units to replace heavier engines that were pulling the front out of the newer light-weight fibre-glass reefer vans. Thermo King used to show it as a Thermo King engine on their brochures. I have long thought this would be a great repower for a number of vehicles. One may need a different governor on the injection pump for variable speed use. Someone with more knowledge than I may be able to answer this.
    Last edited by Bigbjorn; 8th November 2007 at 12:44 PM. Reason: typos
    URSUSMAJOR

  5. #5
    mcrover Guest
    I was reading a bit of stuff from the US on the 4BD2T which apparently is basically the same block but a different head and is intercooled.

    They apparently replaced the 4BD1 and built from 92 to 98.

    Does anyone know if these engines were available in OZ as this could make getting a conversion to an update Disco 1 or Defender re power past EPA/ADR regs a bit easier.

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    Unhappy

    'this could make getting a conversion to an update Disco 1 or Defender re power past EPA/ADR regs a bit easier'


    Didn't realise that this was a problem, does anyone have any more information on this?.
    ........Cheers.....Gerry.

    "IT’S NOT THE YEARS IN YOUR LIFE, IT’S THE LIFE IN YOUR YEARS"

    Ongoing project:
    7/87 110 County 4BD1T/LT95TRB, WTA IC, PTO, Maxied & a Track Trailer.

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    Quote Originally Posted by mcrover View Post
    I was reading a bit of stuff from the US on the 4BD2T which apparently is basically the same block but a different head and is intercooled.

    They apparently replaced the 4BD1 and built from 92 to 98.

    Does anyone know if these engines were available in OZ as this could make getting a conversion to an update Disco 1 or Defender re power past EPA/ADR regs a bit easier.
    4BD2 is indirect injection which makes it quieter but less efficient and slower starting. Th 4BD1T is more reliable too.
    I have a turbo and manifold off a 4BD2 (same as the later 4BD1 turbo and manifold) which cracked it's head.

  8. #8
    mcrover Guest
    Quote Originally Posted by 1103.9TDI View Post
    'this could make getting a conversion to an update Disco 1 or Defender re power past EPA/ADR regs a bit easier'


    Didn't realise that this was a problem, does anyone have any more information on this?.
    I only say that as they tend to frown on dropping in a older engine into a newer car.

    Rovercare (Matt) says it's possible, Im assuming you would need an engineers cert but you would anyway for an engine conversion I'd think but Im not 100%.

    I know bugger all about these engines, I just thought it was interesting.

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    Smile

    Just interested, the RTA may have an issue with the engineering of larger a capacity engine being installed in a vehicle with an original engine of a smaller capacity, thats a given. But if the EPA become more concerned about exhaust or crankcase fuming and/or noise polution on older diesels.........Greeny appeasing........that may spell an end to older diesel engines being installed in newer vehicles totally.
    ........Cheers.....Gerry.

    "IT’S NOT THE YEARS IN YOUR LIFE, IT’S THE LIFE IN YOUR YEARS"

    Ongoing project:
    7/87 110 County 4BD1T/LT95TRB, WTA IC, PTO, Maxied & a Track Trailer.

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    Quote Originally Posted by 1103.9TDI View Post
    Just interested, the RTA may have an issue with the engineering of larger a capacity engine being installed in a vehicle with an original engine of a smaller capacity, thats a given. But if the EPA become more concerned about exhaust or crankcase fuming and/or noise polution on older diesels.........Greeny appeasing........that may spell an end to older diesel engines being installed in newer vehicles totally.
    In that case, you'd want to install the 4BD1T in a vehicle that had the 3.9 V8.

    I'd support emissions standards and testing happily, but not limitations based on age or country of origin.

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