View Full Version : 6.2liter v-8 diesel

02-01-2010, 01:26 PM
Is the 6.2 v8 diesel found in mid 80's chevy's matched with the turbo 400 auto any good, anything I should look out for?

I have the chance to buy either a

1. Former Military M-1031 CUCV converted to 12 volt
’86 Chevy K-30 4x4 dually 8’ flatbed
Dana 60 front axle with manual hubs, GM corp. 14 bolt Rear axle 4.10:1 ratio
34.xxx ORGINAL miles


2. ’84 Chevy K-30 4x4 pickup
8.5’ BOSS rt-3 straight blade snowplow
6.2 liter v-8 diesel engine
Turbo-400 automatic transmission
New Process, part time 4wd #208 chain drive transfer case
Dana 60 front with manual hubs, GM 14 bolt rear end with 4.56:1 ratio and
Detroit locker center section
Engine coolant heater
59,000 actual miles
Runs very good / drives decent
Military M-1028 CUCV with 24 volt charging and starting system

02-01-2010, 01:37 PM
They are a good running engine. Only concern is going to be MPG with the 3sp auto. Also watch out for the military electrical system i think they were 24V. We have had several 6.2 diesels, and they run forever....not a powerhouse like a 5.9 cummins, but a good small diesel.

02-01-2010, 01:40 PM
OK thanks, another question didn't GMC ''remake'' the 350 into a diesel?, what was that engine called???

02-01-2010, 01:45 PM
OK thanks, another question didn't GMC ''remake'' the 350 into a diesel?, what was that engine called???

I don't know what that engine was called, but you DON'T want a converted 350 diesel.

02-01-2010, 01:51 PM
the 6.2 was not that converted POS, was it?????

02-01-2010, 01:58 PM
The 6.2 diesel v8 was introduced in 1982, and was a complete new design. It has nothing to do with the 350 diesels. In 1982 the 6.2 (painted orange) had bigger valves than the later years. The reason that they changed to a smaller valve was that they ran into problems with the heads cracking. In the late 80s they changed a few things and went to a electronic throttle position. You shouldnt have a problem with the military trucks, but most others had an egr valve right in the middle of the intake. I always get a heavy gvw intake to replace it with b/c they flow much better and do not dump all the soot back down the intake.

02-01-2010, 02:10 PM
Hey thanks guys!!!

02-01-2010, 11:19 PM
The 6.2 diesel was never introduced on a power factor like todays diesels but were offered on a power / fuel economy factor to compete with similar power gas vehicles. The 350 diesel was based on the 350 Olds engine if memory serves correctly...and they were junk for the most part. If fuel wasnt filtered properly and regular maintenance carried out then the injectors or pump would stick or something and the engine would hydraulic lock. Dont quote me on that haha.

02-02-2010, 12:20 AM
If you plan on towing with that, I would probably pass on it. They weren't the powerhouse of diesel engines. Light loads, it could handle...but put heavy loads on it, and you will be wishing for something else.

Gravel Rat
02-02-2010, 12:31 AM
The 6.2 rattle can the engine sounds like a bunch of marbles rattled around in a can.

I wouldn't buy a 6.2 it is a gutless pig.

02-02-2010, 01:11 AM
gutless, but cheap and fairly easy to work on, will run on any type of oil based fuel. just update the glow plugs and controller to the 6.5 and it shouldn't leave u stranded.