New HMMWV Engine - Steel Soldiers::Military Vehicles Supersite

jpinst · 10-10-2008, 03:48

I am considering buying a new 6.5 tdl engine for my HMMWV. I found a source with one available.

Apparently its the new engines that are going in the new HMMWV's and is not a GM engine. In fact, I am hearing that its most likely a CATERPILLAR Engine with serpentine belts.

Does anybody have any information on this. Its apparently bolt on, and comes with the new transmission with park. Would this be a mistake to put in?

Actually I really enjoy the CAT engine in my M35A3, reliable and powerful.

Thanks in advance

MilitaryRestoration · 10-10-2008, 03:53

hmm this could be interesting esp. with a possible hmmwv project coming

cAt powered ne thing is awesome!

Recovry4x4 · 10-10-2008, 08:37

I know of the 6.5 TDs but not the CAT. I have one of the 6.5s and it's mfd by AM General not GM. It does have the serpentine belt. FWIW, Moraine assy made the 6.5s until the year 2000. At that time right before they tooled down, they made 10,000 warrany engines and then pulled the plug. All mfg rights were dealt to AM General at that time and they tooled up for the Duramax.

TedG · 10-10-2008, 10:13

The amg ECV2 is to have the dep 6.5td...

ClarkeF · 10-11-2008, 13:23

Quote:

Originally Posted by jpinst

I am considering buying a new 6.5 tdl engine for my HMMWV. I found a source with one available.

Apparently its the new engines that are going in the new HMMWV's and is not a GM engine. In fact, I am hearing that its most likely a CATERPILLAR Engine with serpentine belts.

Does anybody have any information on this. Its apparently bolt on, and comes with the new transmission with park. Would this be a mistake to put in?

Actually I really enjoy the CAT engine in my M35A3, reliable and powerful.

Thanks in advance

GM sold the 6.5 engine and plant to AM General. AM General runs and operations GEP _ General Engine Product who manufacture the 6.5 and 6.5TD engines for the military contracts. The GEP engines have an upgraded block, NA or TD power, and on the latest revision under consideration for the ECV2 HMMWV have a Caterpiller electronic engine management system that was first (and last) used in the 2004 Hummer. It's not a caterpiller engine, just their engine management.

If you have a line on these, I'd be interested in hearing from you - I'm looking for a 6.5TD (not electonic management) for my HMMWV upgrade.

Regards,

Clarke

85-m1028 · 10-11-2008, 18:12

newest Hmmwv powerplant is called the p400, basicaly the 6.5 heavily reinforced and all the problems worked out..

Recovry4x4 · 10-11-2008, 20:34

The 6.5TD I have looks almost unused. I need to groundhop it and pressurize the cooling system to make sure it has no issues, then it will most likely get sold.

jpinst · 10-12-2008, 04:17

so, if I understand you correctly, the newer HMMWV engine with the serpentine belt is made by AMG and not Caterpillar. IS this a reliable engine? IS it a good choice for a swap on my m998?

Recovry4x4 · 10-12-2008, 09:26

I'm no expert on the HMMWV but for a bolt it, correct swap, it's the best route you can take or so I believe.

superburban · 10-12-2008, 15:20

The 6.5 TD is a perfect fit for your 998. Check out TedG's post about building an A2 HMMWV. He had to do some trimming to the tub, but nothing radical.