swap in a 4.3l vortec chevy v6? - Defender Source
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  #1  
Old December 13th, 2014, 11:39 PM
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swap in a 4.3l vortec chevy v6?

I've got an 89 defender with the 2.5l petrol. Can't seem to find any info on a 4.3l v6 swap. Anybody got any info? I had a CJ7 several years ago with the 4.3L and loved it.
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  #2  
Old December 14th, 2014, 10:28 AM
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It has been done but most put In a V8 as it is the same amount of work.
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Old December 14th, 2014, 10:46 AM
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like John said its the same amount of work for a 5.3.. Why bother when they weigh about the same and unless you are getting the 4.3 out of a typhoon it will have roughly half the hp of a 5.3.
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Old December 14th, 2014, 10:59 AM
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I have a Marks adaptor if interested, which can accommodate either the 4.3 or 5.3/5.7...
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Old December 14th, 2014, 11:39 AM
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I figured the smaller 4.3l might prevent any bulkhead clearance issues.


Isn't the mark's adapter for a rover v8 to chevy v8? I have the 4 cylinder, I'm assuming it's a different trans.
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Old December 14th, 2014, 11:45 AM
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It's not the bulkhead, it's up front you need to be more concerned. V6 or V8 will both be in the same place v the bulkhead.
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Old December 14th, 2014, 11:46 AM
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the rover v8 and chevy v8 are about the same size. you won't have clearance issues. Ive got a 355 chevy in my Series I just to give you an idea of clearance. What trans do you have?
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Old December 14th, 2014, 03:43 PM
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lt77 5 speed and lt230 transfer. What else can you "easily" swap in for the 2.5L petrol and keep the existing transmission/transfer? I'd like to keep gas.
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Old December 14th, 2014, 04:01 PM
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Quote:
Originally Posted by 89Defender90 View Post
lt77 5 speed and lt230 transfer. What else can you "easily" swap in for the 2.5L petrol and keep the existing transmission/transfer? I'd like to keep gas.

Why not just go GM Gen III & NV4500, with Nic's adaptor & install kit it's prob the easyist option apart from a LR engine if you want to keep it stick shift. Otherwise go Gen IV & auto....
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Old December 14th, 2014, 04:21 PM
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Is that still in there? I thought you were going to pull that out and go with something less....juvenile.

-Jeff
of course it is. You should know me better by now
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Old December 14th, 2014, 04:26 PM
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I'm also tempted to look in the direction of Chevy V8. I have the type of grill that extends a few inches further than standard, but I also have a bell housing that seems to be much longer than the standard. The 3.5 engine has a good 18" of clearance from the bulkhead to the engine block. Don't know where to start. So I'm looking for a 4.2 right now.
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Old December 14th, 2014, 04:47 PM
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Quote:
Originally Posted by 89Defender90 View Post
lt77 5 speed and lt230 transfer. What else can you "easily" swap in for the 2.5L petrol and keep the existing transmission/transfer? I'd like to keep gas.
If you want to keep the LT77, then there are no options. It is not strong enough for a big engine, especially the version that came with the 2.5. In addition any adapters will be designed for the V8 version of the LT77, which is quite different. Add to that, even if you could work out an adapter, the engine would sit too far back. The V8 gearboxes have a longer bellhousing.

You should be looking at an engine and gearbox combination as mentioned above and an adapter to the LT230.

I will add that nothing is "easy". The only "easy" engine swap (with more power) is a Defender 200TDI. That will drop right in.
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Old December 14th, 2014, 05:11 PM
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But to drop in a 200Tdi, you have to convert the rest of the truck to diesel, etc... etc...
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Old December 14th, 2014, 05:26 PM
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But to drop in a 200Tdi, you have to convert the rest of the truck to diesel, etc... etc...
There is nothing to convert. Just put diesel in the tank. I'm not sure what you are getting at.
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Old December 14th, 2014, 06:04 PM
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There is nothing to convert. Just put diesel in the tank. I'm not sure what you are getting at.
Yeah. I was kind of scratching my head on that one too.
Yours would be simple. Mine was complex because of the computers.
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Old December 14th, 2014, 06:20 PM
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Originally Posted by Red90 View Post
If you want to keep the LT77, then there are no options. It is not strong enough for a big engine, especially the version that came with the 2.5. In addition any adapters will be designed for the V8 version of the LT77, which is quite different. Add to that, even if you could work out an adapter, the engine would sit too far back. The V8 gearboxes have a longer bellhousing.




This is the answer I was looking for.

------ Follow up post added December 14th, 2014 05:29 PM ------

Quote:
Originally Posted by Landy_Andy View Post
Why not just go GM Gen III & NV4500, with Nic's adaptor & install kit it's prob the easyist option apart from a LR engine if you want to keep it stick shift. Otherwise go Gen IV & auto....


I want to stay gas with a manual trans. Where can you get nick's adapters?
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  #17  
Old December 14th, 2014, 06:54 PM
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Originally Posted by 89Defender90 View Post
This is the answer I was looking for.------ Follow up post added December 14th, 2014 05:29 PM ------I want to stay gas with a manual trans. Where can you get nick's adapters?
Check out the Gen IV thread....
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Old December 14th, 2014, 06:58 PM
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Check out the Gen IV thread....
I just read the Gen III thread....how far along are you with your project?
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Old December 14th, 2014, 07:51 PM
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I just read the Gen III thread....how far along are you with your project?
A little stalled at present, waiting on a crawler box to mount between the NV and Nic's adaptor. It'll move the t'case back 8" but give me an additional low range and I have my D2's engine in bits for a top hat sleeved block rebuild...
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  #20  
Old December 14th, 2014, 08:02 PM
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seems like the "easiest" swap will be a LR engine....will the disco gas engines bolt to the LT77?
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