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Gen1 LWB Montero Diesel Swap Options? #1036458 10/20/11 07:22 PM
Joined: Feb 2010
Posts: 117
mrray Offline OP
Wheeler
Hi,

I'm sure I'm going to get flamed for this...

I promise, I've dug through the internet and the 3 fora here and found all kinds of great info on SWB Montero / Raider diesel swaps,but I can't seem to find anything on anyone doing one on the LWB Monteros. My mechanic warned me that even if I found a suitable engine (was thinking Mercedes OM617 or one of the next generation engines out of the early 90's 300d) that the original transmission would likely not be able to handle the torque of a diesel engine (at least one larger than what people are using in the SWB swaps).

I do not possess the skills or knowledge to pull something like this off myself, so I'll be paying someone to do this. So, it will probably not be cost-effective for me if there isn't an option that has already been done and is somewhat detailed and documented.

I love my Monty, had her for about 13 years, and I would HATE to give her up, but I feel the engine is near the end of its service life (205k miles, low oil pressure, some smoke, etcà) and IÆd rather sell it while its got some life left in it to someone who has the ability to fix her up than just run her to the ground. If IÆm going to put a new drivetrain in, IÆd prefer a diesel, so rebuilding / replacing the original engine doesnÆt really appeal to me.
What do you guys think?

Thanks in advance,
Ray


1991 Montero LS (LWB) 3.0L V6 Stock 205K Miles
Re: Gen1 LWB Montero Diesel Swap Options? [Re: mrray] #1036459 10/20/11 07:51 PM
Joined: Jul 2009
Posts: 1,342
RECON45 Offline
Body Damage is Cool
Be orignal and put in a cummins 4bt. <img src="/forums/images/graemlins/smile.gif" alt="" /> I am a personal fan of VW diesel and have worked on them, but I am not sure how well they would do on the lwb. I would slap a 1.9 TDI in a swb in a heartbeat. You might can look at the dodge crd they put in the libertys, if money is not an option. Besides that whatever you do it will be custom and only you can decide how custom you want to go.


91 Montero LS "Sandstorm", Auto, Dual Bouncy Seats, 2" Suspension lift, 2" Body Lift, GENII front IFS, 32" MT tires

89 Raider "Trailbreaker", 3.0, Auto, Dual Bouncy Seats
Re: Gen1 LWB Montero Diesel Swap Options? [Re: mrray] #1036460 10/20/11 10:19 PM
Joined: Mar 2008
Posts: 413
spencevans Offline
Mudrunner
You need to locate a Mitsubishi 4M40 turbo diesel engine. I see them on ebay from time to time. The 4M40 is a direct bolt in for the most part. It should bolt up to your current tranny and your tranny should be more than capable of handling the torque of the 4M40.


Spence
1985 Mitsubishi PU 2.3 Turbo Diesel, 13" lift, Watercooled turbo, 4D56 Head, Atlas II,Fox Coilovers, Elockers,

1983 Mitsubishi PU 2.5 Turbo Diesel 4x4, fully restored

2003 G500, sliders, beadlocks, roofrack, ladder etc.
Re: Gen1 LWB Montero Diesel Swap Options? [Re: RECON45] #1036461 10/22/11 03:38 PM
Joined: Feb 2010
Posts: 117
mrray Offline OP
Wheeler
Sorry for the slow reply! Ubuntu doesn't seem to like this bbs (won't let me log in). Had to wait to get to my windows laptop.

Quote
Be orignal and put in a cummins 4bt. <img src="/forums/images/graemlins/smile.gif" alt="" /> I am a personal fan of VW diesel and have worked on them, but I am not sure how well they would do on the lwb. I would slap a 1.9 TDI in a swb in a heartbeat. You might can look at the dodge crd they put in the libertys, if money is not an option. Besides that whatever you do it will be custom and only you can decide how custom you want to go.


I like the VW TDIs too. I also drive a 2004 VW TDI wagon. I agree with you though, it seems a stretch to put that 1.9 in a big Monty.

4BT would be a awesome! Don't know if I or my wallet could handle a project like that, though <img src="/forums/images/graemlins/smile.gif" alt="" />.

I was disappointed to hear the kind of fuel economy those Liberty's got with the CRD. Probably out of my budget as well.

I should have stated more what I want to achieve:

I have my daily driver (the TDI Wagon). I want to make the Monty into a multifunctional utility vehicle. I'd use it for trips to Lowe's, camping, mild off-road fun, family road trips, etc). I want it to run on diesel for fuel economy, reliability, versatility in fuel type (doomsday scenario <img src="/forums/images/graemlins/smile.gif" alt="" />). Not interested in gobs of power.

I want to improve on the 3.0 V6's fuel economy by a little at least. I don't want to be underpowered, though. I think the V6 had enough for my purposes. 6BT in an FJ60 (granted, heavier than the Monty) seems to do low to mid teens in mpg. CRD in the Liberty same or worse from what I've read.

If a detroit 6.2L diesel V8 can get mid 20's pulling around a giant K5 Blazer, then surely I can get around that same economy in a 4 or 5 cyl diesel with the Monty, right?


1991 Montero LS (LWB) 3.0L V6 Stock 205K Miles
Re: Gen1 LWB Montero Diesel Swap Options? [Re: spencevans] #1036462 10/22/11 03:47 PM
Joined: Feb 2010
Posts: 117
mrray Offline OP
Wheeler
Quote
You need to locate a Mitsubishi 4M40 turbo diesel engine. I see them on ebay from time to time. The 4M40 is a direct bolt in for the most part. It should bolt up to your current tranny and your tranny should be more than capable of handling the torque of the 4M40.


That sounds promising!

Close to direct bolt-in, huh? I thought these were only in later, RHD vehicles. Wouldnt that make things complicated?

Would the older, (simpler?) 4D56 work for my purposes or would I have a snail?

What kind of performance would you expect (I know its just a guess) out of these 2 engines with the stock tranny?

Thanks guys so much for the help. Sorry for the basic, idiot questions...


1991 Montero LS (LWB) 3.0L V6 Stock 205K Miles
Re: Gen1 LWB Montero Diesel Swap Options? [Re: mrray] #1036463 10/23/11 12:51 AM
Joined: Jan 2008
Posts: 335
M
MainstreaM Offline
Mudrunner
Quote
I was disappointed to hear the kind of fuel economy those Liberty's got with the CRD. Probably out of my budget as well.


I just bought one so I'll let you know in a few weeks. It is very powerful at 295ft/lbs of torque. Turbo is very responsive and pulls hard to redline. Only had it for two days but liking it so far.

I've also got a SWB with a 4D55. It does good around town and fair on the interstate. 70 MPH is really pushing it and 65 is bearable for the engine. I don't have a working tach (got one on the way from down under), but am at around 9psi of boost at highway speeds which tells me it's working pretty hard to maintain speed. 13 is the max boost on a manual boost controller. A heavier LWB may be even more detrimental.

Kane


89 Conquest - 2.4 DOHC <--Thats right DOHC Turbo and MPI.
87 Starion flatsider - under restoration
87 Conquest - Saved from the crusher
86 Conquest - Another crusher rescue
88 Conquest - Previous owner abandoned project
87 Raider - under construction

86 Conquest - DD
Re: Gen1 LWB Montero Diesel Swap Options? [Re: mrray] #1036464 10/23/11 04:06 AM
Joined: Mar 2008
Posts: 413
spencevans Offline
Mudrunner
Quote
Quote
You need to locate a Mitsubishi 4M40 turbo diesel engine. I see them on ebay from time to time. The 4M40 is a direct bolt in for the most part. It should bolt up to your current tranny and your tranny should be more than capable of handling the torque of the 4M40.


That sounds promising!

Close to direct bolt-in, huh? I thought these were only in later, RHD vehicles. Wouldnt that make things complicated?

Would the older, (simpler?) 4D56 work for my purposes or would I have a snail?

What kind of performance would you expect (I know its just a guess) out of these 2 engines with the stock tranny?

Thanks guys so much for the help. Sorry for the basic, idiot questions...


The 4d56 is a very capable engine and it is far from being a snail. Back in 1983 the Mitsubishi Pickup with the 4d55 was the fastest production truck offered in the States, and that includes all the fullsize trucks as well. While I think the 4d55 is adequate for your application, the 4M40 is a direct bolt in. The 4d55/56 is not a direct bolt in and if I remember correctly, Mitsubishi backed the 4d56 engine with 5.29 gears on all 4 door Monteros to give them a little more pep. The 5.29 gear sets will cost you about $1700 to have them imported and you would better of spending that money on your engine. The 4d56 and the 4m40 use different trannies, t-cases, motor mounts, etc. Not only does the 4M40 have 35 more hp, but it also has 70 ft lbs more torque than the 4d56 which is a huge difference. THe 4m40 is the only way to go. Other options like the 4bt are just ridiculous, not only is the 4bt too heavy for the ifs, it is too tall for the engine bay. You would have to redesign the whole chassis, suspension and drive train if you put in a 4bt.

Performance for the 4m40 would be great because the first gens are so light. The 4m40 puts out almost 220 ft lbs of torque. My first gen moves great and I only have 168 ft lbs of torque. I wish I had 220 ft lbs of torque and would get 30 mpg.


Spence
1985 Mitsubishi PU 2.3 Turbo Diesel, 13" lift, Watercooled turbo, 4D56 Head, Atlas II,Fox Coilovers, Elockers,

1983 Mitsubishi PU 2.5 Turbo Diesel 4x4, fully restored

2003 G500, sliders, beadlocks, roofrack, ladder etc.
Re: Gen1 LWB Montero Diesel Swap Options? [Re: spencevans] #1036465 10/23/11 11:50 AM
Joined: Dec 2007
Posts: 113
4ePajero Offline
Wheeler
Here is the link to my 4m41 transplant into a Gen1 LWB.
If you use a 4m40, it will be easier, due to less electronics.

Since the two blocks (4m40 and 4m41) are virtually identical, most of what I posted will apply to the 4m40 as well.


Don't ascribe to malice anything that can be adequately explained as stupidity!
Pajero LWB Gen1 3.2 Di-D TD Engine
33" Bridgestone D694s
2" Lift
Front Runner Rack
Re: Gen1 LWB Montero Diesel Swap Options? [Re: mrray] #1036466 10/23/11 07:06 PM
Joined: Jan 2002
Posts: 6,134
TOASTY Offline
Trail Leader
*****
I'm running Linux with no issues running 4x4wire or anything else for that matter <img src="/forums/images/graemlins/lol.gif" alt="" /> <img src="/forums/images/graemlins/lol.gif" alt="" /> <img src="/forums/images/graemlins/lol.gif" alt="" /> <img src="/forums/images/graemlins/lol.gif" alt="" />



4M40 is the most practical easiest Diesel swap you can do, chances are you can find the complete engine, harness (not that you need it) and diesel trans with all the little things you need for around $3500 which is much less than what you'd be spending on any other swap especially since it's a near bolt in for you. there is a write up in the diesel tech section for swapping one into a Gen 2 and your swap would be nearly the same.


1999 Montero SAS'd on Kings and stuff

1998 Montero trying to get a V8 Swapped
Re: Gen1 LWB Montero Diesel Swap Options? [Re: TOASTY] #1036467 10/23/11 08:10 PM
Joined: Jan 2000
Posts: 7,309
PHIL_ Offline
Trail Leader
*****
A lot of folks consider diesel swaps for fuel savings, so here are some real numbers, with 2 1/2 years driving the 4D56T and then 3 with the 4M40T.:

-The 4D56 (intercooled) turning 488s in a shorty genII yielded me just under 10L/100km on 33x1050 ATs.
-The 4M40 (intercooled) turning 490s in a LWB genII is currently getting me about 12.5L/100km on 33s.

I've done better and worse on each, but those are my averages. I track my fuel usage very closely, and do a lot of driving, mostly secondary roads, and some gravel...

The extra fuel used in the LWB is partly due to the extra weight of the limo, and the extra gear I carry on board, but it is a thirstier engine. On the other hand, my opinion is its a much more refined power plant - its quieter, smoother, has a timing chain instead of a belt, has a block mounted vac pump instead of sharing with the alternator, starts better in extreme cold, and has much better usable power, esp if you're coupling it with an auto.

Here in Canada there are several years of Pajeros available. We are allowed to import JDM rigs from Japan as long as they're 15 years old (to the month of build) before they're brought over. GenII pajeros were available in 91 in Japan, starting with the 4D56, which means we could import them starting in 2006. The 4M40 became available in 93, which put them in Canada beginning in 2008. Now and then you can find a wrecked one on the various forsale sites, esp in BC where the port of Vancouver is. This, IMHO is the way to go if you're going to do a swap. Buy the entire rig from somewhere up here, bring it home, and then you've got everything you need.


1991 HZJ77, 1999 KZJ90, 1999 UZJ100, 1992 M101CDN2
https://www.thegearheadproject.com/category/jdm-journeys/

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