Hi all. Today I bought my first County defender and LandRover. Im a complete newbe and have some questions. Its a v8 petrol with the Lt95 box. Im considering the 4bd1/ 4bd1-T conversion and am just wondering if this motor would also be a candidate for conversion. I understand that the bonnet needs to be modified for the 4bd1-T. Would the 4he1-t fit in the same way, only needing bonnet mods what else is there to consider?
Just thought Id raise the question.
Thanks All

Engine specs http://www.peckroad.com/n_specs.pdf

heres one for sale in Aus Used Isuzu 4he1 Turbo Engine Manufacturer exporting direct from Australia

Couple of threads(toyota tech. forum)

Isuzu 4HE1 Swap - IH8MUD™ Forums

isuzu 4BD1T swap?! - Page 16 - IH8MUD™ Forums

I phone BL truck spares they have a 4HE1T with gearbox for $6700 outright with 6 speed gearbox code MBP-6P. Is it possible to use this gearbox or the MXA-5C 5-speed?

The big question is how heavy it is. The 4bd1 is right on the limit for engine weight i would want to put in the front of a county i reckon. 4bd1 = 320kg.

4BD1T = 340kg

4HE1T = 365kg

Whats another 25kg's ?

Why not go for it!!!

However a few points to ponder first:

The manifolds are on opposite sides to the 4BD1 - it will make exhaust plumbing MUCH harder.

Check the height difference between the engines (4HE1 is OHC)

Which t-case will you use. I believe John (Bush65) said that some of the boxes may be too bulky to adapt to an LT230 easily (front output and/or propshaft will foul (unless you run a divorced case).

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Cheers,
Ben.
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1987 110CSW, 4BD1T
1968 IIA 109 2.25D (172-131). REMLR #244

Before I did my conversion (County V8 to 4BD1turbo conversion.) more than one person told me I would have to modify the bonnet to fit a 4BD1T for the turbo and for the thermo housing, unless I got the Landy thermo housing to replace the truck one, but after fitting the engine I found there was plenty of clearance for both without modifying anything.

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'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
Ex '99 Defender 110 Xtreme
Ex '85 Rangie HiLine
Ex '50 SI 80"
Ex '59 SII Diesel LWB Hard Top

IsuzuRover Yep I think form what he said the 6 speed is longer and will ned a divorced case but the 5 speed will fit with enough room.(correct me if I'm wrong)

As for the height i cant find any specs but the worst case scenario would be bonnet mods right? Does anyone know the 4HE1Tdimensions?

Rijidij I read you thread before nice work mate and handy photos there also. Like the paint too

Would be good if Bush65 and Dougal could chime in here as you guys seem pretty knowledgeable on the matter.

Thanks

I think it might be a few weeks before John/Bush65 gets back to you. I think he's on his way across the Simpson.....

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I live with real fear everyday.......


and sometimes she lets me go off-road in my Defender....

As far as I know, the MXA boxes are just updated MSA boxes. They may have bulkier aluminium housings, but the ratios match. My MSA clears an LT230 but I can confirm Bush65 not being able to use an LT230 with his 6 speed box. I think he went to an ATLAS transfer.

Haven't heard of any intentional bonnet mods. I had an unintentional one resulting from a thermo switch which protruded out the top of the thermostat housing further than it should have.
I managed to lower it by about 15mm by breaking the pins off and soldering directly to it. No problems since.