Hello' I've got a 1957 GMC truck with an inline 6 Engine... Ive took a picture of the engine serial number but can't seem to find any info on it... Need it to get my truck registrated... does anyone know what I've got or where to find some info?
Chevys have vin plates on the driver side door jam, also just in front of the steering box on the frame rail. I don't know if it is in the same spots on GMCs but you'll at least have a starting point. We don't use the engine number to register, we use the vin and either an old registration or title. Your state my be different though.
Factory replacement short block or complete engine which didn't come new in a truck. The lower set of #s could be anything. There's a plate on the kick panel by the driver's door with all the truck's #s.
Yes I'm in a different state, hell even a different country ;-) The Netherlands... Europe, and here they want to know what kind of engine your running, so I have to know some specs ;-( So until this far we can say it's a Factory replacement 270 ? anyone more idea's?
It seems to be a 270 and it looks like a replacement engine on which the original numbers were stamped. My first GMC 270 was a replacement block and had just the number 270 stamped on it. As i remember the others had the numbers in a line. But what is it that you need to know? 3 25/32 X 4 bore and stroke.
Here is some general information: The last GMC-only straight six was the 270-cubic-inch (4.4 L) 270. It was produced from 1941 through 1962, and was an OHV/pushrod engine. This is a raised-deck engine. The bore was 3-25/32" (3.78125") with a 4" stroke. The connecting rod length was 7.000". And here is a whole bunch more: Specifications General Specifications Engine: GMC 270 with 269.5 cid (4416ccm or 4.416 litres), inline six, ohv (full pressure oil) Horsepower: 91.5@ 2750 rpm Compression ratio: 6.75:1 Transmission: 5F 1R with two speed transfer case Tires: 7.50 X 20 on most models; others used 11.00X 20 or 11.00×18 singles on both rear axles Weight: 11,000 lbs for cargo trucks and 11,850lbs for dumps Gas Tank: 40 gallons (most models) Ignition Specs for GMC 270 cid Spark Plug Gap: .025 Firing Order: 1-5-3-6-2-4 Point Gap: .018 – .024″ Distributor Rotation: CCW Initial Timing Setting: 5 degrees BUDC Intake Valve Clearance: .012 – hot (older models below 270-11344 use .006) Exhaust Valve Clearance: .012 – hot (older models below 270-11344 use .013) This isn't much help unless you live near a NAPA or you know a nice fella in the US who wouldn't mind sending you the parts when you are in need. Parts Reference Item Replacement Part Notes Oil Filter NAPA 1503 Available from VOV Gas filter NAPA 3042 This will fit perfectly in the original filter case. Just put a medium spring under it to keep the seal. In-line filter also recommended. Spark Plugs AC R45 or AC 44 Champion J8 14 mm Plug Wire Set NAPA 700173 Points NAPA CS763A (same as Chevy 235) Distributor cap NAPA RR95 (same as Chevy 235) Rotor NAPA RR83 (same as Chevy 235) Condenser NAPA RR174 (same as Chevy 235) Coil (6V) NAPA 29730 (same as Chevy 235
I hope everyone rear Beano's post very thoroughly, there will be a quiz later. 6.75:1 CR, I guess it could run on coal. The serial number on the block; were GMC trucks made in California in 57? Sounds like the Dutch want more to issue a title/registration that some states here do. I am Butch/56sedandelivery.
I'm not sure if made in Ca., but do know they we sold on the same lots as Chevy pu's were, at least when where my Dad was shopping, he wanted the GMC, but it was just a few bucks out of his reach, so he bought the Chevy instead. One thing about Beaners post, he's referencing a larger truck than a pickup, but assume the engine spec's would be the same.
Many 270's were listed as having 7.75 compression....And there other detail differences in connecting rods , pistons and heads from year to year. They are all the same but different
Date code decodes as letter for month, day of month and last digit of year. Month code A=Jan, B=Feb, ... to L=Dec. Example: D 25 8 decodes as April, 25th 1968. Numbers are under the manifolds just above the pan flange. The decade of the last digit will have to be determined from date of the block casting number available from various charts. http://www.inliners.org/casting/numbers.html
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