6.2 or 6.5 engine ?

[2mas-]

Hi,

Can anyone tell me if this is the 6.2l engine or 6.5l ?



2mas-

 

[Chief_919]

Can't say for sure with that picture but the emissions sticker is typical of GEP 6.5's.

 

[2mas-]

 

[doghead]

Looks like a 6.5.

 

[Wire Fox]

Everything's more vivid and clean than my engine, that's for sure. Otherwise, looks the same as my 6.5 GEP. I'm trying to wipe everything down as I go through and work on different portions of the engine, since it makes a big job feel a little easier...

 

[gcbennet]

My engine has 'GM 6.2L D' cast into the block on the front RH face below the cylinder head.

 

[86humv]

Hi,

Can anyone tell me if this is the 6.2l engine or 6.5l ?

View attachment 665809

2mas-

Its a 6.5 GEP
Two spots circled ID it as that.

 

[2mas-]

Thanks guys Quick respons here

 

[Sintorion]

Here you go:

View attachment 665813

Does "6.5L Detuned Engine" = non turbo? or is there some scaling back of performance out of the 6.5L?

 

[86humv]

Your 6.5 is a de-tuned motor.
The 6.5 with a 4L80e trans is not de-tuned, and has a different injection pump , water pump, and eng. harness.
6.5 turbo also has a diff. Inj. pump heads, manifolds, and eng. harness as the other two.

 

[Wire Fox]

Your 6.5 is a de-tuned motor.
The 6.5 with a 4L80e trans is not de-tuned, and has a different injection pump , water pump, and eng. harness.
6.5 turbo also has a diff. Inj. pump heads, manifolds, and eng. harness as the other two.

While I'm 100% that the part numbers are different, isn't the injection pump for the 6.5 NA detuned and 6.5 NA the same, except that the 6.5 NA detuned pump has the flow rate dialed down from the factory? This one's really for my own confirmation, because I really don't want to think about also buying a new injection pump right now while doing my 4L80E upgrade... I've spent enough money already before even getting to the "high maintenance" part of HMMWV.

 

[Retiredwarhorses]

Your 6.5 is a de-tuned motor.
The 6.5 with a 4L80e trans is not de-tuned, and has a different injection pump , water pump, and eng. harness.
6.5 turbo also has a diff. Inj. pump heads, manifolds, and eng. harness as the other two.

correct Greg...the 6.5NA in the 4L80E equipped trucks have a lot more felt torque and HP.