My engine blew up.

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Sep 22, 2010
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I have a 91 FJ80, and while driving home the other day I lost oil pressure, power drop, temp spike ect. Now it wont crank. I dug into it a little (pulled the oil pan) the oil is burned and the main I pulled had visible markings in the race. If I wanted to run this engine I'm pretty sure that it would need to be rebuilt.
This brings me to the reason I am posting this in the diesel tech section; from the day I bought my Cruiser I have wanted to convert it to diesel and since the gasser is gone I figure this would be the perfect time to do it. Here's some of the engines I had in mind, their pros and cons.
First is the Detroit (GM) 6.2 V8, Honestly my last choice as it is down on power (most are rated at 130-140HP and 220-240 ft lbs), however they are cheap and plentiful, then its just a matter of mounting it and adapting it to the stock trans (Advance) and so forth.
Next is the Isuzu (GM) (AM General) 6.5 V8, This engine has a lot more grunt(190ish HP and 330+ ft lbs) than the 6.2 because of the turbo, but it has high compression and a turbo which limits the amount of boost that can be run. One could use an intercooler or if one were so inclined one could install marine pistions (18:1 instead of 23?:1) Same mounting and adapting issues as the 6.2.
Next is the Cummins 4BT, I love these engines but they are tall and seriously loud. These things are monsters when it comes to torque (130ish HP and 300+ ft lbs) one can get 200HP out of this engine pretty easily, which I would be quite happy with. From what I've seen this engine requires four inches of lift to accomodate the engine so that it doesn't collide with the diff, and I have yet to see an adapter that would let me use my stock trans.
Next is the Isuzu 4BD1T or 2T, The more I read about these engines the more I want one. They are "quiet", smooth, and have good road manners. They don't have the same torque as a 4BT (130ish HP and 270ish ft lbs) but they have a higher stock RPM range. Power is easy to get out of these as well, but these are still quite tall and I dont know if I can adapt it to my stock trans.
Last are the Toyota diesel engines, I dont want to mess with computers and a ton of wiring so that leaves me with two options as far as I know; the 13B-T and the 1HD-T. Both are hugely (compared to the ones mentioned above) expensive and hard to find. The 1HD-T has the right power numbers (170ish HP and 270ish ft lbs) and from what I've read it's nearly a direct replacement for the 3FE that's in there. The 13B-T is low on power (120ish HP and 160ish ft lbs) for the roads I drive on, even when the 3FE was running well I found myself pounding on the steering wheel as if I could will it to go faster, so if the engine I put in there has less power than the one that's in there now I'll go insane.
Any input would be great! I am on a budget and need to keep the stock trans and case if at all possible. So, inexpensive lift kits, adapters, build threads. Ultimately I want to get my rig up and running (or rattling) again. My neighbors are sick of me driving my deuce and a half every day, the kids on the block think it's cool, but warming it up at 6:00AM may result in physical harm upon my person.
 
My choice would be the Isuzu. I put mine in my 60 with the same tranny (A440) so It can be done. Here is a link to my thread how I did it. https://forum.ih8mud.com/diesel-tec...suzu-4bd1t-swap-part-ii-now-w-a440f-auto.html

There is also a machine shop that is working on adapters right now for the Isuzu to Toyota autos. His name on here and 4BTswaps.com is "69Rambler". He already has adapters done for Chevy trannys and is supposed to have them done for the Toyotas in the next month or so.

I am running a slightly larger turbo on mine and estimate my HP to be about 160 to 170 with no intercooler. Much like the 4BT, the Isuzu's are easy to boost up the performance with some minor adjustments to the injection pump and a larger turbo.

Hope this helps and good luck with your decision.

Don
 
Wow! Thank you for the quick response. Your build thread makes it look so easy. I have been pouing over internet sources for months trying to find a good donor truck for a reasonible price, but I live in the Independant Republic of California (it really is like the twilight zone) where mangled burnt crap is expensive. If by chance you or anyone else comes across an NPR or something like that for less than the cost of a Kidney, if you could let me know that would be great. But another tech question for you; as far as lift is concerned, is there anything you would reccomend on the cheap side, or should I just save my pennys?
 
is there anything you would reccomend on the cheap side, or should I just save my pennys?

Whatever is cheap will be a painfull installation,except maybe the 6.2 which is the way I would go for cheap.
 
The guy making the adapter plates is making them for the a443 and a343 before he makes any fit the 440. (I know because I called him). He is aiming for the price to be in the 1200 USD range which is steep in my opinion. Another option is the Mitsubishi 4d34 which should bolt to the 440 if you get the bell housing from a 99-2004.
 
@rosco, I was refering to lift kits. I need something that will give me the clearance for the engine, but I'm on a budget so quality for money is the name of the game. Four inches for less than a grand would be great!
 
@Bjohnston, thanks for the heads up. There's no way Im paying that much for an adapter, even if I had the money I wouldn't do it. I will look into the Mitsubishi, but it has a lot to prove to get me to move from the Isuzu. For now it looks like I'll be making my own adapter for the Isuzu. I just need to source an NPR or a W4500.
 
Ok, looked at the Mitsubishi. Too new for me, computer controlled diesels can be cool but I don't have the patience for it
 
I'm quite sure Isuzu never had anything to do with the GM 6.5 V8 diesel. The 6.6 Duramax was Isuzu and that one is worth having. But it's electric.

It's no problem to get the same torque from the 4BD1T as a 4BT cummins. The difference is the Isuzu's breathe a little better at higher rpm so they run comparitively more power at the same torque level as the 4BT or when tuned to the same power level (as factory) they produce a little less torque.
Stock injection pump on a 4BD1T is good for around 200hp also. You'll need to swap the turbo, there are several different stock turbos and ~170hp is roughly their limit. Then you need bigger compressor wheels and tighter exhaust housings to get more boost and keep EGT's down.
 
@rosco, I was refering to lift kits. I need something that will give me the clearance for the engine, but I'm on a budget so quality for money is the name of the game. Four inches for less than a grand would be great!

Lift,cheap and quality rarely go together. If you are riding around on something thats jarring your spine ,the whole project will be a dismal failure.
The closest will be a SOA
 
I like the sounds of the Isuzu, but I'm on a very tight budget. So, my choice went to the 6.2/6.5 diesel family. They are a direct swap for any SBC setup, so any swap adapters for the SBC will work for the 6.2/6.5 motors. There are two GM diesel forums that I would recommend you check out as they both have a lot of good info available.

The Truck Stop

Diesel Place : Chevrolet and GMC Diesel Truck Forums - Duramax Diesel Discussion Forums

Both sites have separate forums for the 6.2 and 6.5, and performance forums for those who are playing around with non-stock tunes, turbos and such.

My personal recommendation would be to get a military take-out AMG 6.5. These are the later, and much better, block from when AMG took over the production of the motor from GM.

I could go into much greater detail for you if become serious and want more info about the 6.2/6.5. I have decided to go this route because of my very tight budget. 6.2/Ranger OD/H42 tranny/203 doubler/one pc TC (wish I could afford a split TC but I've already got all these parts now)

Don
 
ARK 0 said:
Ok, looked at the Mitsubishi. Too new for me, computer controlled diesels can be cool but I don't have the patience for it

The 99+ 4d34 is computer controlled but the earlier ones are fully mechanical. They still have a few wires on the mechanical IP to change the timing on cold starts or at cruising speeds but the engine will run 100% without the wires. Most people on here are certain the old 4d will mate to the new 4d bell house which will mate to the 440 but it hasn't been tested yet. I am in the process of trying to source an old 4d to mate to the 440 in my 92 80.
 
you have the FJ80 with the 3FE
the easiest is the 2H using your tranny.
cheap to buy
easy to install
reliable
 
you have the FJ80 with the 3FE
the easiest is the 2H using your tranny.
cheap to buy
easy to install
reliable

2H auto? I hope he takes public transport for 12 months to save some coin for a decent motor :D
 
<shrug>
each to their own, i have driven a few turbo'd 2H over the years and they pull just fine, as fine as any diesel infront of those old autos.
:lol:
 
<shrug>
each to their own, i have driven a few turbo'd 2H over the years and they pull just fine, as fine as any diesel infront of those old autos.
:lol:

I was thinking standard 2H auto in an 80 series,someones gonna be dissapointed after alot of work.
 
I a agree a 2H is going to be both a lot of work and disappointing. I would not be cutting corners on an engine swap. You can do you with your seat choices, roof rack, or some sort of bike carrier on the back. If you're going to do it then do it right and staying Toyota is a good start. If not Toyota the Isuzu sounded like a neat option to me.

Personally I'd rather ride my bike to work than drive something with a hulk of chevy engineering under the hood but that is just me and I don't expect anyone to agree with that.

Maybe a diesel is just something you want and you feel that since the 3FE kicked the can nows the time. If you do not have proper funds then maybe now is still not the time. Gas engines can still be good. Maybe look at a 1FZ or see if the 2UZ-FE can fit in there too. You seem like someone who would enjoy those eight cylinders. A gasser can be simpler to install and cheaper than a diesel and can still return reasonable fuel economy.
 
actually, it isn't a lot of work ...
pull original gasser
leave tranny in the truck
remove existing motor mounts
use the 2H bellhousing,
bolt engine to original tranny,
lower into engine bay,
locate the new engine mount location
remove or lift engine
weld in new engine mounts
upper and lower rad hose from 3FE
run new exhaust to old exhaust
attach electrical
change oil and oil filter
refill coolant
start engine
done
 
Well you got me there on the work load Wayne. Did not know they were that easy. Though he seems to want a lot of power where 140 is not enough (less than a 1HZ) so unless there is a turbo he will be disappointed. Personally I don't care for the idea putting a turbo on the 2H but thats me and I have a lot less experience than a lot of you guys out there when it comes to fitting turbos to engines
 

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