Chevy/GMC 6.2L and 6.5L Discussion of Chevy and GMC Trucks with 6.2L and 6.5L Diesel Engines

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Old Nov 20, 2007 | 03:51 PM
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thinking about trading this guy with a cucv blazer with the 6.2 diesel in it fo rmy wrangler...How are these motors? Also are these descent rigs??? I never even heard of a cucv
 
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Old Nov 20, 2007 | 04:07 PM
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Yes, those were military issue rigs and were very tough. Keep in mind that the 6.2's didnt have turbos but there are retrofit kits with the 6.5 intake to convert them to turbo.
 
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Old Nov 20, 2007 | 04:10 PM
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hmm I am thinking about it, military huh, well it should be able to take some sbuse then....
 
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Old Nov 20, 2007 | 04:11 PM
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Unfortunately if probably already has.
 
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Old Nov 20, 2007 | 04:19 PM
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yea its probably been beat on but, the 6.2 is a reliable and durable motor
 
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Old Nov 20, 2007 | 04:21 PM
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Yes, thats for sure. We've got several 6.2's and 6.5's on our ranch that keep on ticking with no problems. I think the newest one has about 200K on it. They don't make a bunch of power but they are reliable.
 

Last edited by DangerousDuramax; Nov 20, 2007 at 05:54 PM.
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Old Nov 20, 2007 | 05:51 PM
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i got 220K on mine and she starts better than my cummins did and purrs like a kitten...
 
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Old Dec 5, 2007 | 06:23 PM
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Just don't be mislead. The CUCV had 1/2 ton running gear. 10 bolt front and rear. You can tell by the ring gear cover is round on a 10 bolt. They are the same strength as a Dana 44. They aren't worth any more than a civilian blazer of the same year. The low miles is a misleading indicator of condition. All of the vehicles in our motor pool had less than 10,000 miles, and half of them wouldn't run. BUT, if it runs good, you will like it. I think most of them had a Turbo 400 (3 speed auto) and a 208 transfer case (aluminum,but good).
 
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Old Dec 5, 2007 | 07:47 PM
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yeah there isnt anything stronger about them than the regular civvy blazers, 10 bolts arent bad axles if your only running 33 or 35's........
 
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Old Dec 13, 2007 | 03:18 PM
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The 6.2s and 6.5s were given a bad rap due mostly to the timing of their release.After the mess of the 5.7 Olds diesel ,it wouldnt have mattered how good the motor was,GM had a black eye.At the time of the 6.2s intro,diesel was bottom of the barrel fuel,water and sediment among other things plagued the early light duty diesels.GM didnt think avg joe was going to drain water from filters ect,let alone the wife while dad was at work.The fuel system was and still is the weakness in these motors.They are not a Cummins and WILL NOT PERFORM LIKE ONE NO MATTER WHAT YOU SPEND ON IT.I dont care what is posted on these boards,the design will not allow large amts of boost or the amt of heat required to get the boost.Low comp pistons make them hard to start in the cold(wont argue with them,study Boyles law,the internet cant change physics) and put 20-30 lbs of boost on one,better bring a shovel and broom.But used as designed,and some maint,are a good motor.Especially cause they are plentiful and cheap.
 
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