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Thread: 4BD1-T Motor Mounts ?

  1. #1
    toga Rover Guest

    4BD1-T Motor Mounts ?

    Hello All,

    This is Dave from North America.

    I have a RHD '73 109 5-door with a very tired 2.6L petrol motor. I am going to replace it with a 4BD1-T. I am looking for the proper motor mounts for this conversion. Are these specialty items to fit in to my series, or will I be forced to fabricate some custom mounts? Thanks.


    I apologize in advance if this is in the wrong place on the forum.

  2. #2
    Join Date
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    You are in the right section and welcome to the forum Dave.

    The first LR factory vehicles fitted with the na 4BD1 were the leaf spring Series 3 (Stage 1) variants - 1981? onwards.

    Many you will read about here are the later coil sprung 110s.

    You will have to fabricate and locate brackets on the chassis on which to install the mounts.

    The following are for the 110s but I'm guessing that the earlier Series 3 ones were the same:

    (extracted from the Parts Sticky are the top of this section)

    Engine Mounts
    Code:

    LH Eng mount
    Isuzu part no: 5532150320
    Don Kyatt no: 2Y3112

    RH Eng mount
    Isuzu part no: 5532150310
    Don Kyatt no: 2Y3111

    RH mount rubber cover
    Isuzu part no: 9532196020


    Have you considered your situation regarding the (lack of) adequacy of the series gearbox, driveline and braking for the torque of the 4BD1T ?

    The Ser 3 (Stage 1) 4BD1 variants were fitted with the much stronger Range Rover LT95 gearbox and being set up for permanent all wheel drive had different CV joints in the front and a salisbury rear diff.

  3. #3
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    Presuming you're getting the 4BD1T from a truck. Take the truck mounts, they're pretty close.

  4. #4
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    the steel mount on one side is original truck mount-the other is cut down and welded to a flat plate using the same bolts or Air conditioning bracket..

    memory---LH is cut down.as the engine is mounted to one side by 1--2 inch.

    original LR mounts are cut off the chasis.a section made from bent plate is welded on a slight angle-similar on both sides.
    axle bumpstops are extended inch to allow sump clearance.

  5. #5
    toga Rover Guest
    I am mating the motor to a NV4500HD 5-speed from a Dodge pickup truck, and retaining the original transfer case (unless advised otherwisw).

    I also scored a set of '95 Disco axles, so she will also be getting 4 wheel disc brakes and a wider stance. I will probably cut the fenders and add Defender fender flares to cover the exposed tires.

    Lastly, if the power steering box does not fit from the same disco, I will be installing a P38 steering box.

  6. #6
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    Are you going to coil springs too? It's well worth it and apparently leaf springs will interefere with the disco steering rods.

  7. #7
    toga Rover Guest
    Unfortunately, the piggy bank isn't large enough for a coil chassis.

    I have read about the clearance issue regarding the steering arms and the leaf suspension. I am hoping to get around that with a combination of taller seats between the axle and the springs, and some custom spacers where the springs attach to the frame to offset the "drop" in axle height from the seats. I don't want to go Spring Over Axle (SOA) as this would give me too much lift and screw with my driveline angles.

    I thought of going parabolic, but in talking to Rocky Mountain (popular American supplier - Canadian outfit), they told me that they wouldn't be strong enough for my weight (I currently have 1-ton springs on the truck)

  8. #8
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    There must be plenty of dead discos in the US to just cut the spring perches and brackets off.

  9. #9
    Join Date
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    Just to clarify some things that have been mentioned.

    Engine mounts could be taken to mean:
    1. The brackets that bolt to both sides of the engine block. These have been mentioned in the above posts, and Land Rovers used a different bracket to Isuzu trucks on the LH side (not strictly necessary if you are fabricating new chassis brackets, as you will need to do).

    2. The rubber isolation mounts. Also mentioned in above posts. Land Rover used different mounts to Isuzu trucks, but they are close enough, within mm's, to be interchangeable.

    3. The brackets that weld to the chassis rails. These are different size and location to those for any other Land Rover engine. You will have to fabricate your own. Have a look at this write-up that rijidij did on replacing a rover V8 with a 4BD1 - it should help you.

  10. #10
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    I am useing Toyota HJ 47 mounts in my conversion ,Have used them in the past a well designed mount with keepers on 3 sides cheap too
    Will probably be booted off the forum for useing that T swearword

    AM

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