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GMC V12 Fire Truck

Steve Frazier

Founder
Staff member
Joined
Oct 30, 2003
Messages
6,930
Location
LaGrangeville, N.Y.
Local fire department used to have a yellow GMC cabover they called Yellowbird. I sent the link to one of the members to see if it might be it. They sold it to another fire department, I don't know where.
 

terex herder

Senior Member
Joined
Nov 10, 2017
Messages
2,307
Location
Kansas
Quite a few of those V12 were out in the western Kansas down to Texas panhandle pumping irrigation water from deep wells back in the day. A lot were ran on free wellhead gas.
 

Truck Shop

Senior Member
Joined
Dec 7, 2015
Messages
25,154
Location
WWW.
And a must when changing plugs on the old V6-V12--using a blow gun to remove all the
dirt and debris from around intake manifold/manifolds because the plugs are vertical
located in top of cylinder head. Many had made the mistake and items fell into cylinders,
like little rocks/pebbles.
 

Truck Shop

Senior Member
Joined
Dec 7, 2015
Messages
25,154
Location
WWW.
would that be the old turaflow engine??
Correct--all were derived from the Toro-Flow. Several different cubic inch displacements. The
V-12 was hatched from the idea of two 351's to make 702. But it was a one piece block, many
have thought it was two 351's mated, but not. It just had four cylinder heads. The gas & diesel
V-6's were close in design. And they made the 351, 478 & 637 diesels out of the design basically
changing cylinder head ports/chambers & pistons.
 
Last edited:

eastroad

Well-Known Member
Joined
Jun 4, 2008
Messages
145
Location
SW Vermont
And a must when changing plugs on the old V6-V12--using a blow gun to remove all the
dirt and debris from around intake manifold/manifolds because the plugs are vertical
located in top of cylinder head. Many had made the mistake and items fell into cylinders,
like little rocks/pebbles.
Truck stop, the Ford 391 ( Y block?) family could do that, too. BTDT. The GMC 351 was in that GMC family, too. The Texaco distributor in Burlington, VT had a local use single axle GMC tractor with the 702 V-12 in it back in ‘67-‘68. Freshly tuned, it sure sounded sweet pulling the hill up by the shop.
 

Truck Shop

Senior Member
Joined
Dec 7, 2015
Messages
25,154
Location
WWW.
Truck stop, the Ford 391 ( Y block?) family could do that, too
The 391 was a {FE}-Ford Edsel designation, and those could collect crap too but not like
the gas GMC's because there was distance below the plug. There was the 305, 351, 401
& 702. The truck that picked up milk at our dairy was a 1963 Jimmy with a 702 single drive
axle, 5 with 2 speed and 5" straight stacks. Just like the one below, even same color.
Could be heard coming from over a mile away.
*
B7000 GMC.jpg
 

Welder Dave

Senior Member
Joined
Oct 11, 2014
Messages
17,926
Location
Canada
When it comes to noise is there anything better/worse than an engine from GM?
The fire truck has a Van Pelt badge. Should also have a pic. of Linus and his security blanket.
 

Truck Shop

Senior Member
Joined
Dec 7, 2015
Messages
25,154
Location
WWW.
When it comes to noise is there anything better/worse than an engine from GM?
As far as the term on the {pipe}, Ward Rugh trucking in my old home town had some
1091 Hall Scott's with straight pipes. It was said {On a clear crisp frosty morning those
could be herd on the old highway as far away as the city wells, which was about 4 miles}.
And you had to be looking straight at a Rugh driver to talk to him.
 
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