how to tell the difference (looking at engine) between a 6.2 and 6.5L?

[racing4funn]

From pictures alone I dont see anything obvious.. A try to resist saying stick on the valve covers. Some have them and some dont.

 

[rookie]

If u can see the engine from behind there is a yellow tachometer in the middle of the valley if it has a bolt on the right its a 6.2 if the bolt is on the left its a 6.5

 

[chickenbutt]

I'm no expert, but isn't it the other way around? Looking from inside the cab, bolt on left would be 6.2?

 

[joeberg]

Straight from the Army http://www.transportation.army.mil/ADSO/PS_Hot-Topics/Oct_2013_HMMWV detuned engines.pdf

And another reference with pics https://halfmastpsmag.wordpress.com...ween-the-hmmwv-6-2l-and-6-5l-detuned-engines/

I have seen several on GP that were listed incorrectly including one I purchased (listed as a 6.2 but was actually a 6.5).

 

[chickenbutt]

Nice find joeberg! Perfect article for this thread!

 

[rookie]

Youre right chickenbutt im a little dyslexic

 

[infidel got me]

Its funny how they wanted the 6.5 takeouts to go to the rebuild program and the poor old 6.2 takeouts were left for boat anchors.

 

[racing4funn]

I was hoping there was a way to tell from the top and or front. It was the auction trucks Im wondering if they could be miss labeled and how I could identify that from the pictures they show.

 

[joeberg]

Probably half the listings I have checked showed this area of the engine in at least one of the pics. I have found 2-3 that were mislabeled on GP including one I won.

 

[steelsoldier1991]

after looking at pictures i noticed the lip where you bolt the transmission is different lengths as well
6.2 has a shorter lip
6.5 has a longer lip

 

[osteo16]

If u can see the engine from behind there is a yellow tachometer in the middle of the valley if it has a bolt on the right its a 6.2 if the bolt is on the left its a 6.5

OPO

 

[Swfb]

When you can see the rear side of the engine you can see the difference in the seal. The 6.5 has the seal that's replaceble from the outside. The 6.2 has a 2 part seal that can only be reached when removing the oilpan.

Also the 6.2 normally have the 3 belts and the 6.5 a single serpentine belt.

 

[Coug]

When you can see the rear side of the engine you can see the difference in the seal. The 6.5 has the seal that's replaceble from the outside. The 6.2 has a 2 part seal that can only be reached when removing the oilpan.

Also the 6.2 normally have the 3 belts and the 6.5 a single serpentine belt.

except that the 6.2 got replaced by the 6.5 detuned decades ago, so any truck that went though rebuild would receive a 6.5 to replace the 6.2, but kept the V-belt system.