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#154764 09/10/2007 11:56 PM
Joined: Feb 2007
Posts: 513
M
Shop Shark
Shop Shark
M Offline
Joined: Feb 2007
Posts: 513
has anyone put a 6.2 chevy diesel (1985-1987ish) motor in a 47-53 chevy two ton?, would it be the same as a gas v8 converion? and what kind of trouble would i have to go through to get it done? thanks


1949 Chevy 3600 Flatbed all orginal
1964 gmc 4000
1973 gmc 6000
2005 chevy duramax 4x4
1994 chevy 1500
Trucks are GM and Tractors are Orange

"I don't measure a man's success by how high he climbs but how high he bounces when he hits bottom." - General George S. Patton
Joined: May 2005
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G
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G Offline
Joined: May 2005
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I have not seen one done.
Yes, it should be just about the same as the V8 gas conversions.

While many people have good luck with the 6.2 and 6.5 diesels, I hear a lot of people who have problems, or just are not impressed.
If you do this conversion I would recommend you use the latest turbocharged 6.5, they are stronger and much improved over the earlier ones.

Why do you want to do this conversion?
What do you want to do with the truck?
Have you considered more powerful engines, like the Duramax, or a 7.3 ford / IH?
Or even a Detroit?

Grigg


•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
---All pictures---
"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-
Joined: May 2001
Posts: 477
K
Shop Shark
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K Offline
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Posts: 477
i agree with grigg totally. the 6.2. and 6.5's were an anemic p.o.s. and never were much of an engine. with all the experiance g.m. had with diesels, and being the authority in domestic diesels for decades, that they ever did those engines in the first place tells me crack addiction started much earlier than it was reported. g.m. lost a ton of money on those boat anchors.
the 7.3 corn picker engines are very reliable (just stay away from the turbocharged later non power joke version--head gaskets) are economical, and pretty esy to maintain, while not being expensive to buy. do the pump timing and up te pressure 105, along with banks injectors, and the thing will perform much better than stock.

HOWEVER!!!!!
grigg did the ultimate kick-a$$ detroit swap, and i would certainly consider that as an option.

nuthin like a 100 mph diesel bolt making folks scratch their heads!!

Joined: May 2007
Posts: 14
T
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T Offline
Joined: May 2007
Posts: 14
I agree w/Grigg (Hello Grigg).

I had an '84 6.2 1/2ton truck a long time ago. I loved the truck and liked the mileage, but even for a light weight short bed, it was gutless. I hated the engine.

Grigg made a good point on the 6.5. Better performance and it has a turbo. Most of the 6.5/turbo trucks that I have been in are dogs as well. I know a guy that removed the electronic pump from a 6.5 and swapped in a mechanical pump from a 6.2 (w added fuel delivery). It ran respectable.

In all honesty. W/all the masses of Cummins trucks that have been produced over the years, that would be the better choice.
I purchased a complete 03 Cummins engine with tranny and electronics for $1500. With a simple programmer, it'll easily be good for 600+ ft.lbs. It'll eventually make it into my Longhorn.

The old Chevy/GM diesel combo would be cool, but it'll hardly be able to pull its self down the highway.

If you plan on doing any towing duties. Get something equipped w/a turbo.


1968 pro-touring twin turbo Camaro
1968 Chevy Longhorn truck-soon to be Cummins powered
1963 GMC Twin-Six V12 engine
My Twin-Six page:
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K
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K Offline
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yep...... good advice

Joined: Apr 2007
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S
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Keep in mind that a diesel like the 6.2L or 6.5L usually has a sweet spot around 1800 RPM, much lower than the stock truck engine would have.

For best results, gearing changes will be needed.

I am thinking about eventually putting a diesel in my 1967 C50, but it would be a long ways down the road...

To deal with the gearing issue I am planning on installing an divorced NP205 transfer case backwards to act as an .5 overdrive. This along with my SM420 and two speed rear end should give me plenty of gearing options for either a gas or diesel engine, and handle cruising at 55-60mph.

[img]http://img146.imageshack.us/img146/408/nooverte6.png[/img]

[img]http://img253.imageshack.us/img253/3945/wirthovercw2.png[/img]


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