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6.5L turbo vs 6.2L
- Thread starter Duster06
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Didn't they have a picture of the data plate?
Wire Fox
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Ok, here's some solid data for you.
How to know the difference between a 6.2L engine and a 6.5L engine: https://halfmastpsmag.wordpress.com...ween-the-hmmwv-6-2l-and-6-5l-detuned-engines/
For Turbo vs Non, the best way to check is to look at the top and rear of the engine to notice the style of air intake it has. They're significantly different.
Turbo:
Two long, aluminum rails running the length of the block, joined by a crossover toward the rear of the block. Turbo is mounted underneath this.
Natural Aspiration:
Air intake feeds directly to top-center of the spider-like assembly. No turbo anywhere to be found on a NA system.
Fastest way to know the difference between a 3 speed and 4 speed transmission is to look at the shifter. Assuming there's been no extensive custom work to modify the shifter into a non-standard use, you should see the following:
3 Speed:
4 Speed:
EDIT:
As an extra note, there's no reason I know of why you couldn't have a HMMWV be fully functional with a 6.5 TD engine and a 3 Speed transmission. It would be within the power limits of the transmission and the engine itself will function just fine. You'll be able to enjoy a great deal more take-off power and have greater performance at higher altitudes. You'll just feel a bit weird on the highway, because your engine will be at very high RPM to maintain cruising speed, limited from cruising faster only by the lack of an overdrive gear that the engine has plenty of power to handle.
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GP has not sold any turbocharged HMMWVs yet. The certain id for 6.2 vs 6.5 is the oil pump drive clamp in the rear engine valley, drivers side is 6.2, passenger side 6.5.
BLK HMMWV
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Of the three only one will be a turbo.
That narrows it down allot.
If it doesn't have a turbo on it it's not a 6.5 turbo.
That leaves 2 choices. 6.2 or 6.5 N/A
Pictures of the shifter and the engine will help determine allot.
could have a 6.5 N/A and a 3 speed
That narrows it down allot.
If it doesn't have a turbo on it it's not a 6.5 turbo.
That leaves 2 choices. 6.2 or 6.5 N/A
Pictures of the shifter and the engine will help determine allot.
could have a 6.5 N/A and a 3 speed
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I didn't know this at all. Got any pics of the difference? Googling now.
Edit, found this. Very cool info.
https://www.google.com/amp/s/halfma...-the-hmmwv-6-2l-and-6-5l-detuned-engines/amp/
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Thanks for the help guys! It's not a turbo. I'm still trying to figure out how to tell if it is a 6.5L or not. As a self taugh mechanic (aka, this is the first car I've ever worked on) im still trying to find the bolts described in the article, but I'll figure it out eventually.
Wire Fox
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Easiest way to check those bolts will be to sit in one of the front seats, remove the doghouse/"engine cover" from inside the cab, and look at the "valley" of the block. You'll see the oil pump/tach drive quite plainly from this perspective and it will be very easy to judge which way the bolt is facing and thus, what size engine you have. What's trickier is figuring out if you have a GM 6.5L or a GEP 6.5L. The difference doesn't really matter unless you're performance tuning the engine, in which case the GEP will have better alloys and construction than the GM to deal with the increased heat more effectively. For 99% of HMMWV owners, it's a moot point and you probably have the GEP, anyway.