Diesel in a J Truck

[Barrys]

Anybody ever swap a diesel into a FSJ. :cool:
Do you think a '86 J20 frame and such could handle the weight of a 6 cylinder Cummins Diesel from a Dodge pickup.
The front axle may have to be upgraded to a Dana 60 and the front springs would need beefing up or replaced to deal with the weight a Diesel.

ANY input would be good smile.gif

Thanks
Barry

[Barrys]

I just thought of using the "search engine" for this site and found some info.
Has anybody completed this swap?
What was done to beef up the frame?, axle, springs, etc.

Thanks

[CowKiller]

6bt wont fit unless firewall is moved back, or it is a REALLY tight fit. a 4bt is better, and has been done, there is also a guy doin a 6.5 turbo in a g wag

[brad_fsj10]

Find a Nissan diesel drivetrain out of a Nissan pickup or a dead Scout. Lots lighter than a Cummins or Detroit. Of course not as much power, but I imagine if it works in a heavy-a** Scout it will work pwr-2-wt in a FSJ.

[FSJeeper]

Originally posted by CowKiller:
6bt wont fit unless firewall is moved back, or it is a REALLY tight fit. a 4bt is better, and has been done, there is also a guy doin a 6.5 turbo in a g wagHow many of these diesel swaps have you done? Firewall does not have to be moved back, and yes, it is a snug fit but not a problem at all to put a 6BT in a FSJ. I have pics to prove it. The GM 6.2 and 6.5 fit very well and I had no issue with this swap although another club member reproted some clearance issues. For me, it fit just fine.

The 6BT has been done a number of times in various FSJ's including the wagoneer. GM 6.2/6.5 conversions are common in my parts.

I would definitely beef up the frame, run stiffer springs, and run a dna 60 in the front if you go 6BT.

[CowKiller]

****, didnt mean to piss peopel off, i was just reciting what i was told. i had planed on doin an international swap, but aint got the money fome people do to get everythin they want

[FSJeeper]

Originally posted by CowKiller:
****, didnt mean to piss peopel off, i was just reciting what i was told. i had planed on doin an international swap, but aint got the money fome people do to get everythin they wantThis guy just needs to know that a Cummins swap is not hard to do, a GM diesel swap is almost as easy as swapping a PO AMC motor (To be taken back if Elliot is watching and he has not bought that M715 yet.)

[CowKiller]

thats why i wanted to do the international. an old 6.9 needs one wire to run. power to fuel pump. no turbo, no electric. no need for glow plugs. one spurt of ether in the mornin and it will start all day

[Max Power]

I luv my MBZ diesel. If the 360 in my jeep ever kicks, I'll definately put a diesel in there.

Norristown isn't super cold, I say go for it... you could buy one of those cj-10 tugs and pirate what you need, then sell the frame and body. nissan 3.3 is a good engine.

[ncjeepers]

I wouldn't even consider a Nissan diesel for a swap because it's underpowered and all the parts are fabricated from unobtanium (unless you have a FAT wallet). If the one in my CJ-10A ever quits it'll get a gas motor.

[DieselSJ]

I keep hearing rumors of these 6bt swaps into Wags and J-trucks, but I have yet to see one. With the length issues on a 6.5, I can't see how a 6bt would fit without MAJOR surgery in a Wag or J. Someone please show me a 6bt installed into something other than a M715.

[ January 08, 2005, 11:46 PM: Message edited by: DieselSJ ]

[Elliott]

Originally posted by FSJeeper:
</font><blockquote>quote:</font><hr />Originally posted by CowKiller:
****, didnt mean to piss peopel off, i was just reciting what i was told. i had planed on doin an international swap, but aint got the money fome people do to get everythin they wantThis guy just needs to know that a Cummins swap is not hard to do, a GM diesel swap is almost as easy as swapping a PO AMC motor (To be taken back if Elliot is watching and he has not bought that M715 yet.)</font>[/QUOTE]Ummmhmmm.... ;)

I've got some rough measurements on a 7.3TD if anyone wants 'em. The engine is in my 2000 F350, but it gives an idea of clearance required to fit.

[ January 09, 2005, 08:21 AM: Message edited by: Elliott ]

[Knucklehead]

I'm interested in the 6.2 or 6.5 GM/Detroit.

Anyone have any info on these? How long do they last? How durable are they? Mechanical injection?

This would be an easy swap into a FSJ, if you get the complete drive train.

[DieselSJ]

6.2/6.5 will last 250-300K miles if you take care of it. A guy over on the 6.2/6.5 boards has over 400K on one. They were mechanical injection up to 93. 94 and later are electronic, but can easily be converted to mechanical. They are very durable.

[mcinfantry]

a 6bt will fit. i would guess you need a automatic, and i dont know about an intercooler, or i would guess you need a 3" body lift or decent suspension lift.

im only basing this on my experiance with a 4bt. also expect 3800+ lbs on the front axle so a dana 60 would be required.

cummins 6bt
length w/o mech fan 34"
length with mech fan 38"
height 32"
width 30

cummins 4bt cpl 858 specs
NON intercooled
dry weight 700
hp 105
tq 265
gvw 16000lbs (4x2)
length w/o mech fan 26"
height 32"
width 27"

[FSJeeper]

Originally posted by mcinfantry:
a 6bt will fit. i would guess you need a automatic, and i dont know about an intercooler, or i would guess you need a 3" body lift or decent suspension lift.The 3" body lift and suspension lift is the secret to getting the 6Bt in there, however, a standard transmission works fine. Intercooling can be taken care of with an air to water 6BT intercooler like the Dozers use. It bolts on top of the 6BT valvecovers.

[mcinfantry]

any pics of the air to water intercooler? how much height does it add to the engine??

my 4bt is bolted to an nv4500. i put the shift tower of the nv4500 out the stock hole. mind you the 4bt could be moved back probably 6 inches, it would also push the shift tower back 6 inches, which was unacceptable to me. i have no idea on shift hole locations on the waggy.

i personally would run (and i did) a 4bt with no body or suspension lift.... i despise body lifts, and 3 inches i extreme.

is the front frmae on the waggy the same as on a m715?? could you still run spring under on one??

[Mikel]

Lee,
When you say that you could move your powertrain back another 6 inches, does this include the exhaust coming out of the turbo?
Thanks,
Mikel

[mcinfantry]

no, no possible way on the 4bt.im against the heat shield now, i was not going to cut up the firewall

i was told the 6bt haa the two cylenders at the BACK of the motor. in other words the turb is in the same area.

[Knucklehead]

Originally posted by DieselSJ:
6.2/6.5 will last 250-300K miles if you take care of it. A guy over on the 6.2/6.5 boards has over 400K on one. They were mechanical injection up to 93. 94 and later are electronic, but can easily be converted to mechanical. They are very durable.Thanks

I'm just starting to research this. I think that it is in the future for me. Just neeed to find a good donar truck. I want to keep it a manual (t-18). So I need to look into some adapters---unless I find something with a NV-4500 and transfer all mounted to the 6.2/6.5 engine.

[Mikel]

So basically you are as far back as the exhaust will let you.
Thanks,
Mikel

[mcinfantry]

yes. thats correct