6.2 military engine

[pete54]

Has anyone converted a military 6.2 to run in a regular truck? Any advise would be welcomed.

[wthif]

Starter needs to be 12v but other than that it works. We need more information, what are you doing?

[pete54]

I'm going to replace my old 6.2 with a military humvee motor. Its going into a 83 c3500. If the pump relay and fuel shut off are 24 volts, should I just swap with my old 6.2? Are there any more things I should change. My old 6.2 has a turbo. Will that swap over without any problems? Also is there any thing I should up grade during the change? Thanks for any info you can give.

[wthif]

It is the same engine, so everything should swap without a problem. Just swap your starter and everything else should be fine in terms of 12v. To the best of my knowledge the only thing 24v on the engine is the starter other than that everything else is 12v. The turbo will swap fine also. I would wait to see how it runs before swapping the IP unless your old one has been rebuilt lately the same goes for the injectors. You'll also need to put your belt drive acessories from you old engine on your new one and the intake is slightly different; mainly the studs are 180* off.

What kind of shape is the military engine in? Have you heard it run?

I would want to know how it is running before swapping it in just so I know I'm not trading problems.

[john8662]

A good way to tell 24v verses 12v is the connector on the top of the pump used.

Most of the Military 24v pumps used a round connector.

Most of the 12v pumps use the spade connector (what you're already familiar with).

The military vehicles used a lot of 12v stuff. With this said, I'm referring to the Blazers/Trucks/Vans. The Hummers on the other hand, used more 24 stuff, and you see the round style connector on the IP on an engine pulled from a military Hummer.

J

[moody]

mine had glow plugs that have a mil spec connecto on them. I swaped them out for standard AC 60s.

[moody]

mine had glow plugs that have a mil spec connecto on them. I swaped them out for standard AC 60s.

[ccatlett1984]

A good way to tell 24v verses 12v is the connector on the top of the pump used.

Most of the Military 24v pumps used a round connector.

Most of the 12v pumps use the spade connector (what you're already familiar with).

The military vehicles used a lot of 12v stuff. With this said, I'm referring to the Blazers/Trucks/Vans. The Hummers on the other hand, used more 24 stuff, and you see the round style connector on the IP on an engine pulled from a military Hummer.

J

The military blazers\trucks (CUCV's) use all 12v stuff except for the starter and glow plugs.

HUMVEE's on the other hand are pure 24volt.
If you have a take out engine from a humvee then you will need to swap the injector pump as well as all of the sensors.

[murphyslaw]

The military blazers\trucks (CUCV's) use all 12v stuff except for the starter and glow plugs.

HUMVEE's on the other hand are pure 24volt.
If you have a take out engine from a humvee then you will need to swap the injector pump as well as all of the sensors.


dont need to change the ip just take it to a shop and have them put in a 12v fuel cut off.

[neo]

I don't want to hijack the thread, but what year models are most of the surplus military engines? Are the blocks from all the engine year models basically the same, or were there things done in later years to beef up the notoriously weaker lower end? I have an opportunity to buy an 83/84 (not exactly certain yet) engine from a civilian van or a military surplus unit as a spare and don't know which would be better (they both cost the same).

THanks!

[murphyslaw]

I'm not sure I would guess that they will varry widely such as the year's of hummers and such would vary. I am not sure what year mine is but its a 660 block I think that means its 88 or older.