The GM light-truck 6.2L and 6.5L diesel engines were optional in the
1982-2000 C/K series pickup trucks, and in the Suburban, Chevy Tahoe &
Blazer, GMC Yukon & Jimmy, vans, and motor homes (RV) - in both turbo diesel
(TD) and naturally aspirated (NA) versions. In addition, low cost and ready
availability have made these engines extremely popular the world over for
diesel conversion projects; powering Land Rovers, Land Cruisers, and a host
of other foreign and domestic production vehicles.
Designed as a diesel engine from the ground up by the Detroit Diesel
Division of General Motors, the original 6.2L diesel engine was introduced
in the 1982 model year GMC and Chevy C/K pickup truck and full-size SUV
lines. Taking this engine design to the next level in the 1992 model year,
the new 6.5L diesel engine was an advancement in technology, and was
designed for the application of a turbocharger. The 6.2L saw its final year
of production in 1993. While the 6.5 was replaced by the Duramax 6600
beginning in the 2001 model year Chevy and GMC vehicle production, the 6.5L
diesel engine continues to be manufactured and sold by AM General for the
civilian H1 Hummer & military HMMWV.
The only major problem I've heard of is the placement of the injector pump
controller down in the block valley which tends to overheat the controller.
After market suppliers have come up with several solutions to this problem
buy installing larger heatsinks and/or moving the controller itself to a
different location. Hope this helps.
The 6.2 is a useless dog. The early 6.5 was a dog, but they managed
to get some life out of it after they worked the kinks out. Not bad units
for chugging along (think farm equipment) if that is all you need.
They couldn't touch the Ford, or Cummins, though.
Don't get anything that does not have a turbo if you plan on having any
The Duramax is a great unit if you have the bones.
Is it a useless dog as in run away from it?? Or is it a useless dog that
I want it to be able to sit a long time or go on a 400 mile trip without
breaking down. Will this thing have a 70 mph cruise or is it getting pushed
hard at that speed. Like my Dads Van??
Here's the vehicle in question.
http://cleveland.craigslist.org/ctd/1318964766.html I already own a
bottom rusty 81 with a Chevy 350 and 200,000 miles thats probably unsafe.
But it gets me everywhere. Im in a severe salted road area. Pretty isnt
It should run for a long time. (see below for more)
That unit without a turbo might have a problem with 70, at least going up slight
Here's the skinny on diesels. They really love to be feed air. Any diesel that
does not have a turbo will be very underpowered. They will have plenty of low
end torque, but they really won't have any get up and go, or keep you there,
The second you hit a grade your speed will drop off quickly and it won't matter
how hard you push on the accelerator. That particular engine was bad enough
with a turbo, I could not imagine how gutless it would be without one.
Anyway, take it for a spin. Let that experience tell you if the performance is
up to par. As for durability...I'd say that it has another 100,000 on it. It
so who knows? Just change the oil religiously in them. Diesels create a bit
more sulfur in the oil than gas engines (even with low sulfur fuel), and that
makes for nasties in the crankcase.
Looks like a well cared for unit for the price.
Look for rust under the carpeting just in front
of the barn doors. The interior looks like aftermarket
but a nice job done. I have a spare tire
bracket and cover from a full size '87 Blazer that you can
have for the shipping.
I have been driving 6.2's for over 20 years and love them-- 2 pickups, a
Suburban and a van. The one problem I have had with all of them was
breaking starter bolts. Make sure it has the little bracket on the rear
of the starter. I've been driving a gas 92 GMC with a v6 for a couple of
years, but recently got a nice little 86 shortbed C10 with a 6.2, and as
soon as I fix a couple of minor things --not engine related-- am going
to start driving it. I'm seriously thinking about replacing the bolts
every oil change as a preventative measure. Larry
BTW, the 6.2's have about the same performance as the old stock 350's in
the early 70's after they lowered the compression and stuck EGR on them,
and before fuel injection. But they will easily get 20mpg where the old
gassers would be hard pressed to get 10. I got 27 out of my 83 GMC 1/2
ton once-- on the highway at about steady 60 and the a/c off.
Just read your post today, guess what! The module that controls the
injector pump died.
Short story, Chevy dealer replaced motor two years ago. Left wiring
harness loose that goes across the back of the motor. It rubbed against
the block, and shorted out several circuits. One was the PCM, and the
other the fuel module. just my luck.
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