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Thread: A tale of two engines

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    A tale of two engines

    [IMG][/IMG]

    Well some time has past since I decided that I would put a isuzu into my 130 Defender. So after a few threads and lots of questions and responses I realised I needed a donour vehicle which would supply a good part of the conversion. Thanks to Chris on the forum I purchased of a Stage 1 isuzu ute which I nicked name Truckosaurus after it self engaged the starter while I left it in gear at the local school fete. Deciding to cross a road and demolish the innocent Ford Falcon rear panels parked opposite, shunting it up over the curb before a passer by remembered where the battery was and disconnected it. Was embarasing enough to have the school PA anounce could the owner of a Land rover ute rego ......., but the owner of the Ford just happened to be my step daughters teacher. Great!
    Truckosaurus was driven to shed and immediatly dismembered and consquently scattered along the eastern coast of Oz to be reincarnated into it's next manifestations.

    But I had made my first comitment towards the transplant happening removing Truckosaurus's heart.
    [IMG][/IMG]
    From talking to others realised I was going to have to get some extra bits and Radiator (thanks Brian), and steering pump (thanks Peter) and of coarse copious amounts of information and advise(thankyou AULRO members.) I'm sure there was something else I needed?
    Anyway:-
    Then there was the issue of gearboxes, torque impulses and do I turbo it, but more of that later. So have decided I will keep a log for anyone who is interested. While the Stage 1 motor was a great donk it seemed it was also a noisy beast and this concerned me. My daily driver was about to take on an even more agricultural tone to it. Not confortable with that concept, it seemed that late model 4BD1's were generally quieter so it was back on the search. Finally a 1990 4BD1 NPR engine turned up it was not a turbo, but it was in good nick, so sold it was and off to Canberra Hi HO Hi HO I go. Here it is on the back of the 130 in transit from Canberra.[IMG][/IMG]
    There are quite a few differences between the two motors from the image above it came be seen to have a the twin oil spinner fitted, this it seems was fitted to late versions of the NA isuzu engines.

    The fuel filters differ also with the 1990 motor having a spin off fuel filter.
    [IMG][/IMG]
    The earlier Stage one motor have a element style filter.
    [IMG][/IMG]

    The water pump housing is different on both these motors and I'm told that it is to do with the truck and landy model motors rather than the year of manufacture. These I will swap over as the Landy seem to have a bleed screw on the top of the housing. I intend to change over the Landy specific item onto the later motor.

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    Great start, Garry. Eagerly awaiting more.
    Danny

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    Hi Garry, You will find that the thermostat housings have a different bolt pattern and are not interchangeable but all is not lost, you can use the truck one and just chop a bit off the top radiator hose. Then just change the thermostat covers over. If you turbo it you can put the turbo thermostat cover on which has a spot for a fill point. I have the part number for this if you need it....Brian

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    Quote Originally Posted by Bearman View Post
    Hi Garry, You will find that the thermostat housings have a different bolt pattern and are not interchangeable but all is not lost, you can use the truck one and just chop a bit off the top radiator hose. Then just change the thermostat covers over. If you turbo it you can put the turbo thermostat cover on which has a spot for a fill point. I have the part number for this if you need it....Brian
    Thanks Brian, I kept looking at the thermostat housings and yes they do look different found myself pondering what to do there. Murrey has the truck housing on his conversion and it seems to fit on his. The thermostat covers looked similar though and yes I am going to turbo it. I have adapted the turbo manifold to fit a Garrett turbo I bought. Here is a picture of it fitted up[/IMG], have to go and get some compressable exhaust gasket to make up the gaskets still. It has cork sandwiched in between the manifold, adaptor and turbo at the moment. The part number will be good to know, I can order it this week and then complete this part of the conversion is this a land rover part or an isuzu truck part?
    regards
    Garry

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    Looking good so far!

    Make sure you keep the dual oil filter setup.

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    Quote Originally Posted by isuzurover View Post
    Looking good so far!

    Make sure you keep the dual oil filter setup.
    Yes thats a keeper have already to go a pair of 60mm blocks to move the housing out to clear the front tail shaft. Murrey suggest this would be a good spacing, has been a great continual help with information, suggestions and support. Heres an image of the the oil housing adaptors![IMG][/IMG]
    Require some very long high tensile studs/threaded rod to fix it off 215mm & 185mm in length. Have a friend thinks he maybe able to get these in studs. will wait and see, otherwise its going to be $70 for a metre of HT threaded rod. Ourch!

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    rijidij's Avatar
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    Quote Originally Posted by Bearman View Post
    Hi Garry, You will find that the thermostat housings have a different bolt pattern and are not interchangeable but all is not lost, you can use the truck one and just chop a bit off the top radiator hose. Then just change the thermostat covers over. If you turbo it you can put the turbo thermostat cover on which has a spot for a fill point. I have the part number for this if you need it....Brian
    G'day Brian,
    Just to clarify this, are you referring to the whole housing that bolts to the front of the head, or just the top part that goes directly over the thermostat having a different bolt pattern.
    I suggested to Garry that he swap the whole housing over from the Landy engine to the truck engine. Fred Smith has the whole housings in stock, so I'm guessing they bolt up to the head the same.
    I just left the truck housing on mine and ended up cutting out part of the steel brace under the bonnet. The Landy thermo sits a lot further to the drivers side, clearing the bonnet brace.
    As you suggest, either type can be used, but you might have to make some minor changes to hoses etc.

    Cheers, Murray

    '88 County Isuzu 4Bd1 Turbo Intercooled, '96 Defender 130 CC VNT
    '85 Isuzu 120 Trayback, '72 SIIA SWB Diesel Soft Top
    '56 SI Ute Cab


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    [QUOTE=rijidij;1234061]G'day Brian,
    Just to clarify this, are you referring to the whole housing that bolts to the front of the head, or just the top part that goes directly over the thermostat having a different bolt pattern.
    I suggested to Garry that he swap the whole housing over from the Landy engine to the truck engine. Fred Smith has the whole housings in stock, so I'm guessing they bolt up to the head the same.
    I just left the truck housing on mine and ended up cutting out part of the steel brace under the bonnet. The Landy thermo sits a lot further to the drivers side, clearing the bonnet brace.
    As you suggest, either type can be used, but you might have to make some minor changes to hoses etc.

    Cheers, Murray


    G'day Murray, The whole housing. it has a different bolt pattern, from memory I think 1 bolt extra is used on the Rover one and the truck thermostat receptacle is on the RH side compared to LH side on the rover. Thats no problem as you just shorten the radiator top hose. If you want to use the Landy isuzu thermostat housing you can alloy weld up the hole for the extra bolt. But I reckon its easier to use the truck one and if you are going to turbo it use the turbo thermostat cover with the turbo coolant return nipple and 2 plugs on the side where you can put an elbow for coolant fill/bleed. It just bolts straight on.......Regards.....Brian

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    rijidij's Avatar
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    Quote Originally Posted by Bearman View Post

    G'day Murray, The whole housing. it has a different bolt pattern, from memory I think 1 bolt extra is used on the Rover one and the truck thermostat receptacle is on the RH side compared to LH side on the rover. Thats no problem as you just shorten the radiator top hose. If you want to use the Landy isuzu thermostat housing you can alloy weld up the hole for the extra bolt. But I reckon its easier to use the truck one and if you are going to turbo it use the turbo thermostat cover with the turbo coolant return nipple and 2 plugs on the side where you can put an elbow for coolant fill/bleed. It just bolts straight on.......Regards.....Brian
    Thanks Brian,
    Garry's using a turbo that is oil cooled only, so at least the water plumbing will be fairly simple.

    Cheers, Murray
    '88 County Isuzu 4Bd1 Turbo Intercooled, '96 Defender 130 CC VNT
    '85 Isuzu 120 Trayback, '72 SIIA SWB Diesel Soft Top
    '56 SI Ute Cab


  10. #10
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    The thermostat housings that landy engines are fitted with came from early 4BD1 truck motors,the same applies to the waterpump and right hand engine mount.I've seen a number of these earlier engines at truck wreckers before.
    A search through your isuzu dealer's old parts books should confirm this.
    Cheers Eric

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