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  #1  
Old 01-15-2013, 11:52 AM
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Dr. Marneaus Dr. Marneaus is offline
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6.2l GM Diesel?

I know soem folks have done it, and I've seen the good and the bad about these engines.

Folks say when maintained and built right they are perfectly fine, plus you can tune em and squeeze out a bunch of fuel economy.

However,
I believe these things are somewhat weak as far as numbers go, like 130HP and 2something torque?

I assume the swap would be fairly straight forward (as far as engine swaps go)? almost like a 350 swap? Engine, tranny, mounts, t-case?

A guy on a local forum has one that's a good runner just pulled out of a K5, and that got the wheels turnin' in my head....

I'm probably just dreaming though.

Thoughts?
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The Beast Build Thread:Marns '73 Wagoneer Thread
1973 Wagoneer - 1987 360 w/ factory 4bbl - TH400 - D20 - D30/D44
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Old 01-15-2013, 11:59 AM
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Suddendeath Suddendeath is offline
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I can't speak on the difficulty of the swap, but my buddy has a M1009 CUCV blazer with the 6.2. It won't win any races or tow 20,000lbs, but with his 4.56's and detroits f/r he can go and do just about anything. Truck was sunk in a lake, water completely covering the back half up to the cab and only the top of the hood just barely above the water, and she was still purring like a kitten.
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Old 01-15-2013, 01:31 PM
joe joe is offline
 
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A starting place would be read up in the specialty tech section
http://www.ifsja.org/forums/vb/showthread.php?t=136741
Scroll down to Dusty's post (#3?) about the Gm motors. I haven't done the swap but bought a 150,000 mile 6.2 2WD C20 for a donor but liked the way the Chev worked as is I didn't have the heart to ruin a perfectly good Chev. It's got a TH400 and 4.10 gears and no it's not a vroom vroom race truck for but normal use and towing works very well and jumps up onto a freeway with ease. Certainly no slower than a stock 150,000 mile AMC 360 gaso. Don't have a J-truck anymore and the C20 is in good condition so I plan to keep it stock till the wheels fall off. I'm a believer in the 6.2's. Lotsa aftermarket zoom zoom stuff avail if needed. My original swap intention was sorta based on your premise: should be any easy swap if you start with a complete donor truck. Complete donor 6.2 truck are a lot cheaper up front buy-in costs than a donor cummins truck. For small dsl's I do like inlines better than V's but in my world cost is a factor. Also has the typical Chev benefit, if you break it parts are avail at any drug store. I may not have "the best dsl" but it works very well for intended use. Key to any swap is start with a good condition motor with preferably a known maint/use history. I'd also recommend buy a complete donor truck rather than just a stand alone motor on a pallet. Hunting down/buying the little bitsa's can kill your budget. Figure out your allowable budget for a swap but keep in mind all motors need maint w/costs involved, they all wear out and break eventually. No dsl swap is an 'ok I'm done and will never have to pop the hood again' free ride.
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Old 01-15-2013, 02:04 PM
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Quote:
Originally Posted by Dr. Marneaus
A guy on a local forum has one that's a good runner just pulled out of a K5, and that got the wheels turnin' in my head....

In my humble opinion "because I have this engine" is typically a bad criteria to start an engine swap. I would spend some time studying what engine would fit your needs best and doing a cost analysis, and then make the decision.

There are reasons why some engines are very cheap and others more expensive.
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  #5  
Old 01-15-2013, 03:38 PM
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Like i said, it just got the wheels turning in my head.
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Dr. Marneaus is now officially my idol.

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The Beast Build Thread:Marns '73 Wagoneer Thread
1973 Wagoneer - 1987 360 w/ factory 4bbl - TH400 - D20 - D30/D44
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  #6  
Old 01-15-2013, 03:49 PM
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Tnfalconer Tnfalconer is offline
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I am putting one in my 70 gladiator. Not because they are super cool or the latest thing or super powerful. Honestly I have plenty of them. The military sold them new in the crate for under 500 bucks a couple years back and I ended up with some extras. I have several CUCV trucks with 3.08 and 4.56 gears in them behind the 6.2 diesel and a 400 turbo. If you take care of it the combo is bomb proof. It is certainly underestimated, mostly by folks who have no actual knowledge of them other than what they read. Geared correctly they are great motors. It isn't a speed demon and doesn't make as much HP as a 5.9l cummins, but I have never been let down by mine. A turbo upgrade makes a HUGE difference in performance and can be had for junk prices usually. I love them. I have done more stupid stuff with my CUCV's than I care to mention here and they are still chugging right along. Parts are available at every parts house in the country. If you break down on the side of the road in BFE hundreds of miles from home, you will be glad to have such a common,underpowered, regular old 6.2 diesel motor under the hood. I know I have been.

Last edited by Tnfalconer : 01-15-2013 at 03:53 PM.
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  #7  
Old 01-15-2013, 05:14 PM
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The Anti-Chrysler The Anti-Chrysler is offline
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I had a NA 6.2 in a 1993 Sierra, and it ran great towards the end, I had it tuned well enough to throw around a k2500 4x4 extended cab around as well as I would compare to a TBI 305.

Unfortunately, at around 140k, the crankshaft broke. Literally in two. The back of the motor would run while the front pulleys did not move. Reminded me of the old 2.8V6 motors. I should also clarify that when it blew, it had a full pan of oil, was not overheated or even working hard, and had been running perfect in the months before.
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  #8  
Old 01-15-2013, 08:03 PM
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mdill mdill is offline
 
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If you need an updated version (plug and play) with the old GM 6.2->6.5's
http://www.optimizer6500.com/

Specs.


Horsepower:
  • 190 @ 3400 rpm-T
  • 205 @ 3200 rpm-T
  • 160 @ 3400 rpm-T
Torque:
  • 440/380 @ 1800 rpm-T
  • 290 @ 1800 rpm-N.A.
Max Governed Engine Speed: 3400 rpm

That in front of a Allison 1000 or 6L80 would make a good swap.
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  #9  
Old 01-15-2013, 09:30 PM
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I like mine.

http://www.fsjnetwork.com/forum/view...php?f=12&t=360

No it doesn't have the power of a cummins, I don't expect it to. I don't have as much in it as would have been with a cummins. Rebuildable 4bt/6bt's are at least a grand around here.

It does just fine being non turbo which I think comes from my gear ratio, tire, and transmission combo.
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  #10  
Old 01-15-2013, 10:36 PM
budojeepr budojeepr is offline
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I like mine too

I like mine. Long thread, lots of pics and source info:

http://www.ifsja.org/forums/vb/showthread.php?t=82155

I lucked out and got a 6.5 that had been transplanted into the donor Suburban. I sourced turbo, intake and exhaust manifolds off of eBay and had custom exhaust made so I could have a bit more power.

I love the throttle response and 20+mpg.
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Old 01-15-2013, 11:38 PM
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Dr. Marneaus Dr. Marneaus is offline
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Awesome, thanks for the links guys, i'll get to readin'!
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Dr. Marneaus is now officially my idol.

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The Beast Build Thread:Marns '73 Wagoneer Thread
1973 Wagoneer - 1987 360 w/ factory 4bbl - TH400 - D20 - D30/D44
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  #12  
Old 01-16-2013, 07:29 AM
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Mr. Goatman Mr. Goatman is offline
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I'm glad you started this thread. I too am in the "thinking" stage for a diesel. I'm not going to swap my current wagoneer because I have been working in it forever and am almost done. I want to find good body and do a "frame off"- then put it back with a diesel. I am thinking older 6.2 for ease, cost, and fuel economy.
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Old 01-16-2013, 01:38 PM
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Dr. Marneaus Dr. Marneaus is offline
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Quote:
Originally Posted by budojeepr
I like mine. Long thread, lots of pics and source info:

http://www.ifsja.org/forums/vb/showthread.php?t=82155

I lucked out and got a 6.5 that had been transplanted into the donor Suburban. I sourced turbo, intake and exhaust manifolds off of eBay and had custom exhaust made so I could have a bit more power.

I love the throttle response and 20+mpg.

FYI i actually had a dream that i swapped the diesel into my jeep last night, and I was driving it around with a big ole grin on my face. Its all your fault for having those videos!!!!
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Originally Posted by FSJunkie
Dr. Marneaus is now officially my idol.

The Mag - The Wag

The Beast Build Thread:Marns '73 Wagoneer Thread
1973 Wagoneer - 1987 360 w/ factory 4bbl - TH400 - D20 - D30/D44
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  #14  
Old 01-16-2013, 01:41 PM
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Tnfalconer Tnfalconer is offline
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What is the general consensus on adapting the motor mounts to a J truck, for those that have put a 6.2 in their truck? Is there a kit that is better than the other? More complete?
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Old 01-16-2013, 02:08 PM
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The PIG Smith The PIG Smith is offline
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Quote:
Originally Posted by Tnfalconer
What is the general consensus on adapting the motor mounts to a J truck, for those that have put a 6.2 in their truck? Is there a kit that is better than the other? More complete?

Here is a posting about mounting a 6.2L Diesel engine.
There are good pictures that the Novak Adapters mounts higher on the frame rail and had to be trimmed for them to clear the steering shaft.
The Advance Adapters unit fits better.

I like the looks of the Novak units better.
Less holes equal more strength, but with less adjustability.

http://www.ifsja.org/forums/vb/showthread.php?t=82155
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...but if it works, I wouldn't touch it.
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Old 01-16-2013, 03:44 PM
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I plan on doing this swap but with 6.5 mech inj. td. My only advise for this is never use a block that came from GM, only use GEP blocks. I have gotten mine from Teds trucks n stuff and he sells 6.2 as well from military takeout program. I have not had any issues with their engines. I don't believe mine have ever been used.
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Last edited by hookedup50 : 07-01-2013 at 11:31 AM.
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  #17  
Old 01-16-2013, 03:49 PM
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Tnfalconer Tnfalconer is offline
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Thanks for that. I am getting my transmission adapter from Novak, so I guess they will get the nod for the motor mounts too. You specified the "classic" mounts worked better?
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Old 01-16-2013, 08:28 PM
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Tnfalconer Tnfalconer is offline
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Bryan I just noticed that the Novak motor mount kit is 100.00 more expensive than the Advance adapters kit. Is is 100 bucks better?
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  #19  
Old 01-17-2013, 10:25 AM
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The PIG Smith The PIG Smith is offline
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Quote:
Originally Posted by Tnfalconer
Bryan I just noticed that the Novak motor mount kit is 100.00 more expensive than the Advance adapters kit. Is is 100 bucks better?
Allow me to be clear: I am just passing along information from projects that other members have posted here.
I have not not performed this swap (yet) or used these products.
However, I was a mechanical designer in a previous life, so I would like to think I know a little something.
Please understand these are my thoughts and opinions.
Your mileage may vary.

To answer your question, are the Novak Mounts worth the extra cabbage?
IMHO, Yes.
The Novak mounts seems to be engineered better, not generic in nature.
If you look at the AA mount, they are adjustable with slots.
I personally do not care for that.
What is the keep that from sliding under the torque of the engine?
Can one tighten the fastener enough to keep it in place?

I would like rigidity in my motor mounts.
I do not want my engine sliding to the passenger side of the engine bay when I make a spirited left hand turn.

I see that the Novak mounts has a few holes in the down leg of their product.
I am guessing with grade 8 hardware, that would be fine...
...but with the overkill thinking I have...once I got the mount all positioned the way I liked it, I would remove them and have it all welded up.
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1981 J20: Commercial flat bed. Long term Project: RUST! No Cab Brow!

Quote:
Originally Posted by Jayrodoh
...but if it works, I wouldn't touch it.
Quote:
Originally Posted by Lindel
Best laid plans, yada yada yada...

Last edited by The PIG Smith : 01-17-2013 at 08:23 PM.
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  #20  
Old 01-17-2013, 04:02 PM
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Tnfalconer Tnfalconer is offline
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Quote:
Originally Posted by The PIG Smith
...but with the overkill thinking I have...once I got the mount all positioned the way I liked it, I would remove them and have it all welded up.

I had this in mind as well. That was really the basis for the question. I don't mind paying for a better product. Thanks
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