It definitely has a lot of good still in it, even the old wood box is still usable. Plenty of original about it, including the 6 volt system(too bad it doesn't have the radio anymore - it was actually optioned with it!) Even has the original engine, but it is stuck. Got it soaking in penetrating oil and hope I can save it. Appears to be the 302 six!
Spanky: I didn't remember seeing that, but there is a tag near the passenger side hood hinge. I attached a photo. Will eventually take another look.
EdPruss: Didn't see it last I looked, but will try again now I know where. Maybe it was covered in grease. I do know the door plate says G43152. "are the wheels Budds or motor rim and wheel?" Wut
The glove box lid tag, will have all the trucks spec.s, as in, engine size, axle types, trans. type, and rear axle type listed on it, type brakes, and type wheels used on it listed.
Spanky Hardy Collector Of Fine Old G.M. COE Trucks & Antique Holmes Wreckers
Hy Alex Arrow, In my experience Canadian GMC engines which have serial numbers that begin with the letter "G" as on the serial number plate picture you posted are 248 engines. I believe the fact that your engine only has the numbers 248 indicates that the engine was replaced at some point in the trucks life, hope that helps.
you probably have a Chevy engine, Canadian GMCs in those years come with Chevy engines when new and the truck frame would need to be modified to accept a GMC engine if someone had managed to fine one to put in there
give us a better view of the overall engine or the block casting number, but from what i see in the photos you have a replacement 235 with non factory stamped numbers (number physical size is too small) -stan
The stamped 248 most likely denotes a replacement GMC block as mentioned above, that never had the additional numbers stamped from the original engine, Chevy never had a 248 engine.
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires. '47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle. '54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed. '55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
GMCs didn't get GMC engines in Canada in those years that truck originally had a Chevy full pressure 235 in it, one year before USA Chevys got the full pressure 235 in regular production
my understanding is that the GMC engines that the USA trucks have are slightly different length and so in the USA you can't swap a Chevy engine into your GMC because the front frame parts are slightly different to accommodate the respective engines
whereas in Canada, the only different between a Chevy Truck and GMC for AD years is the front grill and radiator, the tiny name plate on the dash, and a GMC horn button (there maybe a few other trivial details i'm forgetting at the moment, but they are not significant in anyway to the operation of the vehicle). you can (and i have) swapped the Chevy engine from a GMC into a Chevy, because it's the same engine in Canada i have never seen the GMC engine up here in person, doesn't mean it doesn't exist, but it's rare if it does -stan
yup i stand corrected, never seen a GMC engine in person up here, largest trucks i own or ever been around is my 2.5Ton learned something new thanks -s
GMC small block 6 cyl. engines are about 3" longer than Chevies, thus, one can easily put a Chevy engine in a GMC, but some mods are required to put a GMC engine in a Chevy truck.
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires. '47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle. '54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed. '55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
Well, the engine has been soaking for a week and still won't budge. Hope I can still save it. Want to keep the GMC branded engine in it and I don't have the ability to do an engine swap.
Wanted to heat up the block, but having trouble with the block heater in it. It won't come out so I can clean and test it.
Be careful you don't bend a rod or damage something else. If it did not come easy, I would be taking it apart and freeing the parts one at a time to reduce the chance of damage.
Mac :{)
1962 K10 short step side, much modified for rally 1969 T50 fire truck, almost nos, needs a few things
If you find a stuck valve, remove the entire rocker arm assembly and see if that helps.
Putting it in gear and gently rocking the truck back and forth might break it free as well, just be sure to use a couple chocks set loose so if it breaks free is doesn't roll away.
Coke or molasses poured in a clean(no oil product) cylinder will break the rings free, don't get in a hurry. The acid dissolves rust, ATF combinations are just a lube, do not do anything to rust.
Ed
Last edited by EdPruss; 12/23/20193:52 AM.
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires. '47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle. '54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed. '55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
Nice looking truck! Very similar to mine (52 GMC 9700) even the deck could be the same (mine is Obeco) Mine was also a Saskatchewan Truck (was in Brock) I have a running 248 GMC, and have got a Cummins 12v that I will likely be putting into it... I'm out in BC now though.
ATF is a great cleaner. Mix it with equal parts of acetone for a homemade penetrating oil. I have also added a quart to a slugged up engine, ran it for 1,000 miles before an oil change with amazing results. I did this with a ‘65 Chevy van with either a 230 or 250 (can’t remember) and a ‘77 V-8 non stovebolt that sounds like creep. In both cases it cleaned them enough to stop the lifter noises.
Phil Moderator, The Engine Shop, Interiors and Project Journals
1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes Project Journals Stovebolt Gallery Forum
