What you probably have is a 3-71N GM Detroit Diesel. 3 cylinders,
71 cubic inches per cylinder, normally aspirated (3-71T would be
turbocharged.) Even though it is normally aspirated, theis is a
two cycle diesel and still needs a blower to run. Once you get it
running, it just screams compared to a four cycle diesel.
Just filters, oil, etc are a ton of money to maintain on these things.
Don't even think what injectors and fuel pumps cost. They are
durable little engines, though.
My dad and Happy Welker kept a fleet of Euclids (GM's make of off
road mining trucks and construction equipment) going at the mine,
each with a pair of 6-71N's in it. Unfortunately this was work
and I only got in on what they did for fun on the gas engines in
small trucks.
The pistons, valve train, injectors, and push rods are the same on
all 71 series engines. They came all the way from the three cylinder
version to a V 12 (12V-71N or T). There is also a 53 series, a 92
series, and for really heavy applications a 149 series.
The 71 series diesels are still built, though I would imagine they
have changed some in the last 10 years or so. If the thing doesn't
start with clean fuel and fresh oil, you may have to get next to
a Detroit Diesel (they are no longer owned by GM) dealer. If you
live in a big city or an industrial small town, they should be in
the phone book.
Now you know as much about it as I do.
Bruce K
57 3200
MN
At Saturday, 2 February 2002, you wrote:
>This old 470 GMC with diesel is sure huge on parts. Cab mounts are
cast alum,
>not just metal straps, from x-over is big and dips way down, engine
mounts
>very heavy, high on frame, Clutch housing very small and round,
trans is big,
>maybe it's a 5spd? Can't get it to shift, moves back and forth in
Neutral gate
>which seems long. Looks much bigger than SM420, and I'm thinking
maybe a
>Clarke. U-joints are huge, rear-end is huge. Wheels are huge! Wheels
are
>Daytons, and all have a big "crack" looking spot where tube stem
comes out. Is
>that normal? Looks too even and on all wheels to be a cracked spot.
>Springs/hangers are huge! Cab seems to be diff on front floor panels.
Has a
>big "bump" to inside accross the firewall not on 2-tons like I have.
Trans
>cover seems flatter than my 2-ton even tho it has smaller trans
in IT! Lots
>different than I'm used to, outta be a "new" experience working
on this truck.
>
>G. L. Perry
>Huntington, IN 46750
>AD COE's in restoration
>54 Chevy 2-ton (driver)
>94 GMC tilt-cab flat-bed
>55 Ford F-600 flat-bed
>MM Jet Star 3 tractor
>oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
>
===================================================================
EASY and FREE access to your email anywhere: http://Mailreader.com/
===================================================================
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
|