[warwick]

hello all, found this forum while searching diesel info. i am a newbie to diesel, i understand the basic principles to a diesel engine but i have no knowledge of specific engines.

i have alot of questions but would like to start by asking about some weights of the "big three" engines[ ie FORD, GM , DODGE, cummins ]

i want to put a diesel in my '68 Kaiser-jeep M715(http://www.m715zone.com/Pnuke/index.php). once i get an overall idea of engine weights i can figure out which can be used with stock axles and suspension.

thanks

 

[DBogo]

the easiest would be the 12 valve cummins out of a dodge because its all mechanical and is probably the best engine out of the IDI, powerstroke, 6.2, 6.5TD, and duramax the 24valve cummins and the cummins CRD are both good engines but alot of electronics to work with

 

[Spencnaz]

There are conversion kits to put a GM 6.2 diesel in a M715. I looked into it a while back and 6.2s while not powerful are easily had at government auctions.

A V8 diesel would fit best in there. A Navistar 6.9 would be a killer setup with the right gears. I seem to remember that the M715 had 5.88:1 gear ratios in the differentials. A 6.9 weighs about 1000 pounds when all complete. I dont see any problem with the running gear of your M715 handling that.

Your biggest problems is being able to run on the highway without bouncing off the governor, so some sort of overdrive or splitter in the transmission would have to go in.

I'm sure that there are plenty of websites with help on this very topic.

Post some pictures when you get it done!

 

[Pat Dolan]

This depends on your spirit of adventure more than anything else.

The 6.2 would be easiest, especially if you elected to use a GM 400 or stick with T-18 trans/transfer case combo behind it. It would be approaching a bolt in (except for mounts).

The Navistar and Cummins are pretty big and heavy for a J20. I would check out an Isuzu 6BB1 if you could find one. Way more compact and there is nothing as sweet as a genuine industrial quality inline 6 for EVERY reason. Engine to gearbox interface - some assembly required.

Pat

 

[warwick]

thanks for the replys. i like the idea of keeping it military by using a 6.2L from a CUCV or HMMWV. and the fact that the military is repowering the humvee's the price for the 6.2L should reasonable at surplus auction.

i read that the 6.2L fully dressed is about 650#, does this sound right to you guys?

the idea i have for my M715 is to keep the dana 60 front and dana 70 rear with 5.87 gears. to replace the np200 with a deviorced np205, hopefully from a dodge. as far as the tranny i can't decide whether to keep the stock T98 or swap in a sm465. of coarse a nv4500 would be the ticket but i can't afford to one.

think i am gona pick up Haynes "Diesel Engine Repair Manual" to help learn what i will be getting myself into with a diesel engine. if you all know of any other books or magazines to help me learn my way around a diesel please post them here.

thanks & take care

 

[DBogo]

that haynes thing is crap i looked through it and its too widespread you want one divoted to the engine your going to get but the best diesel book ive ever found is diesel fundamentals it it very outdated though all mechanical no electronic stuff but it explains the principle of diesels very well

 

[Dave Whitmer]

Use the 6.2 or 6.5 in a Jeep. The International and Cummins are too heavy for real off-road work. Your rig would look like the Titanic: Down by the bow.

Jeeps in general take to GM stuff well. A 6.2 or 6.5 will bolt up to a NV4500 with minimal effort. Forget automatics. Diesels destroy automatics.

6.2s weigh about 700 lb. and will fit any engine compartment you think you can get a big block into. Make sure you get the diesel power steering pump, the one of gassers would need a different sheave to turn fast enough to work.

The only other engine I’d consider is the Cummins 4BT. About the same power and weight but more durable and more expensive and not easy to get parts for.

 

[DBogo]

[ QUOTE ]
The only other engine I’d consider is the Cummins 4BT. About the same power and weight but more durable and more expensive and not easy to get parts for.

[/ QUOTE ]

i would have to dissagree with you here all the parts of a 6BT(the cummins in the dodge) are interchangeable with the 4BT its basically the 6BT with 2 cylanders chopped off

 

[Hoss350]

I'm with Dave, the 6.2 is the way to go. You'd need an overdrive or splitter if indeed you have 5.88. That would help the power issue, although my old chevy with the 6.2 was a really nice truck, I loved it. It seemed slow, but it tugged pretty good. You can also turbo them, and turn the pump up to get more power as long as you have a pyrometer. They are light, all the other options discussed are WAY too heavy.

Pat Dolan has a good idea with the isuzu, because you can get the Isuzu engines to bolt up to GM bellhousings, because they were in bed for some time. The Isuzu NPR cab-overs used Isuzu 4 and 6 cylinder diesels, and also the chevy 350 small block. Find a wrecked NPR for a light, powerful turboed 4 cylinder that should bolt right up with minimal fuss... You could even use the tranny out of the NPR if you really wanted an auto, with a T-case adaptor.

Neat project, let us know how it turns out...