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4bd1 with auto or v8 petrol?

Tech Talk for Rover owners.

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Posts: 190
Joined: Wed May 21, 2008 3:55 pm
Location: Coffs Harbour, NSW

4bd1 with auto or v8 petrol?

Post by PacMan »

Hi,

i have a 83 Range Rover with Borg Warner auto and rebuilted heads.
The problem is that the bottom end is in very bad condition.
I am thinking now about two solutions.

First is to change the bottom end against a 3.9 or 4.4 and run the engine on LPG.
My questions is, has the 83 engine already the high comp heads or the old ones with small valves?
And is there any problems with carbies and LPG conversion?

The second solution is a 4bd1 diesel out of a Land Rover Country but i want stay on auto.
Is there a adapter kit for a 4bd1 to auto available?

Thanks for any kind of information.

Greetings
Chris
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Post by cloughy »

The BW35 is a dog of a tansmission and doesn't handle a 250 well, let alone a 4BD1 shaking it about :shock:
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Post by Mark2 »

The cheapest and easiest option is probably to buy a wrecked Discovery 3.9 auto and swap the drivetrain over. Will cost you MUCH less than an 4BD1 conversion and the ZF auto is way better than what you have now.
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Post by lokka »

4BD1 and AUTO should never be mentioned in tha same post ya can forget about that idea unless ya like replacing autos ...

Like mark said find a 3.9 and ZF if ya that way inclined and dont go much on the 3rd pedal and using ya left arm/leg ...

Cheapest option come get the 3.5 and recoed BW35 i have here il let em go cheap and you will have a good engin and a spare 35 as ya will need it they dont last ...
Cheers

Chris

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I can fix your F'ups for a fee .......
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Joined: Wed May 21, 2008 3:55 pm
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Post by PacMan »

Hi,

looks like the 3.9 v8 on LPG with zf auto is the best solution.

Can anybody tell me if my engine has the high comp heads?
The Range Rover is build in Jan. 83.

@lokka: Thanks for the offer, but i dont want 3.5 any longer.

Greetings
Chris
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Post by ISUZUROVER »

lokka wrote:4BD1 and AUTO should never be mentioned in tha same post ya can forget about that idea unless ya like replacing autos ...
Sorry, but that is wrong. No reason you can run an auto, you just need an auto that is strong enough. e.g. those listed here:
http://www.isuzudieselswapper.com/

There were also factory ISUZUs which ran the 4BD1 and an Aisin (or Allison?) Auto.
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Post by Loanrangie »

Hm, 3.9 /700R4/ LT230 = match made in heaven :)
Saddle up tonto, its the not so loanrangie! . 98 TDI DISCO lightly modded with more to come.
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