Engine Serial Number
Just bought a large Hyster fork lift with a V6 305 in it. Engine Serial Number is 305C 534051. Is there any way to tell what year this motor is? No plates on the forklift.
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Re: Engine Serial Number
Welcome to the forum Farmer Dean.
According to Jolly's site the 305C was used in 1960 and 1961. We would love to hear the story of your forklift and see a few pictures for the club if available. Have a great day, -Jeannie 6066 GMC Club |
Re: Engine Serial Number
The only one that's good on identifying the year of a V6 by the serial number is Lewis Matkin. Otherwise look at some of the casting dates on the intake manifold and exhaust manifold, if original they will give you a close ball park figure of what year the engine is. The 305C was manufactured from 1960-74 not 60-61.
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Re: Engine Serial Number
Thanks for the replies, found a 10/22/69 on the exhaust manifold; assuming they manufacture a production run of manifolds before the need them, my motor is probably a 1970? Comments?
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Re: Engine Serial Number
According to an old AERA engine and head identifier book. 1969 is it. 305 block model e and c 515000- 536000.
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Re: Engine Serial Number
It could have very well beem an engine that was manufactured in the 1969 model year run that was left over to be used in the 1970 model year, that would explain the later dated manifolds.
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Re: Engine Serial Number
Very good sleuth work folks, thank you for the help. Farmer Dean
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Re: Engine Serial Number
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I sort of always assumed that the letter changes followed the years of production, appears that is not correct. |
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Re: Engine Serial Number
Previous to the "D" block designation it would have been the "A" for 1960 and some 1961 models, the "D" was introduced in the 1961 model year as well and the main difference was it was a 2bbl version rather than 1bbl and ended up replacing the "A" version all together by 1962. Like Ed Snyder said The "C" version was a heavy duty version used in bigger trucks, it had the longest run of all the GMC V6 engines for 15 consecutive model years up through 1974.:thumbsup:
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Re: Engine Serial Number
Hey everybody! Mine's a D and she's from 1962. I looked at that page and in the notes section it says C models were 1960 and 61 in big trucks. (note 2).
If thats wrong we should get it changed! :thumbsup: |
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The info on the site states "Used in 1960-61 in series 4000 trucks" that means this was the one of two Engine use in these trucks as note #2 in on both the 305B & 305C engines. Don't read anything into the notes that is not there. also note 4 "The 305C was the same as a 305B except for manifold and carburetor which provide increase horsepower".
Notes were posted to the page as I found the info, no were in the notes does it say the 305C was dropped from the line up. |
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Ahh ok. It reads different when you're looking at it. I understood "This motor was used only in 1960 and 61 in big trucks, that's all." And since mine is 1962 with a D it made sense to my simple brain! :D |
Re: Engine Serial Number
FetchMeAPepsi, your truck is a light truck, a 1962 so the engine it should have is the 305D, which replaced the 305A in the engine line and the 305A was dropped after the 1961 model year.
Here is what you need to know about 305 V6 Engines, 305A 1960-1961 light duty engine. 305B 1960-1961 Med Duty truck engine 305C 1960-1974 Med & Heavy duty engine. 305D 1962 Light Duty engine. replaced 305A 305E 1963-1974 Light & Med duty engine. Replaced 305D. Light duty engine had 3 piston rings, heavy duty had 4, but some light duty engine have been found to have 4 rings as well. Light duty trucks 1000-3500 Most used the 305, with the 351 as an option. Med Duty trucks, 4000-6000 you could find 305, 351 or 401 egnines in these trucks. Heavy Duty trucks 6500-9500, most of these had the 401 or 478. 7000 series had the 702 V12 1960-1965. All GMC Images & material contained on the WebSite were taken from publicly available sources provided by GMC to promote their Trucks from 1959 to 1974. |
Re: Engine Serial Number
FetchMeAPepsi, your truck is a light truck, a 1962 so the engine it should have is the 305D, which replaced the 305A in the engine line and the 305A was dropped after the 1961 model year.
Here is what you need to know about 305 V6 Engines, 305A 1960-1961 light duty engine. 305B 1960-1961 Med Duty truck engine 305C 1960-1974 Med & Heavy duty engine. 305D 1962 Light Duty engine. replaced 305A 305E 1963-1974 Light & Med duty engine. Replaced 305D. Light duty engine had 3 piston rings, heavy duty had 4, but some light duty engine have been found to have 4 rings as well. Light duty trucks 1000-3500 Most used the 305, with the 351 as an option. Med Duty trucks, 4000-6000 you could find 305, 351 or 401 egnines in these trucks. Heavy Duty trucks 6500-9500, most of these had the 401 or 478. 7000 series had the 702 V12 1960-1965. All GMC Images & material contained on the WebSite were taken from publicly available sources provided by GMC to promote their Trucks from 1959 to 1974. |
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The 305D came into play in 1961, you could get the 305A or the 305D that year. By 62 it was just the 305D:lolsmack2:
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:ahhhh: Now that's a buncha info! I could listen to you guys talk about engines all day. Makes me even more proud to be part of the club :yourock: And now I really wanna get back to work on Cecilia... Only one more fence panel to go, then erect my shed, and BOOM - back to work on my baby! |
Re: Engine Serial Number
I believe this is now fixed in the notes section of the Engine Data page. I will further clarify the page on the site renewal in the coming months as time allows.
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I am trying to find out what year and size V6 GMC engine a friend has and all I have to go on is the engine number. The number is WG2 247G675 the engine is running a hammer mill and has not been in a truck for years. Any help is appreciated.
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Doesn't sound like an engine serial number, the correct engine ID number is below the front right bank cylinder head, thee is a machined boss were the number is stamped and the first 3 digits will be the displacement of the engine.
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Re: Engine Serial Number
Paul, BBV6 advised earlier in this post to check intake and exhaust manifold cast numbers. Is that what the number is from?
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Re: Engine Serial Number
The engine belongs to someone else and he gave me the number so I do not know at this time where he got it. I will try to get the proper number later. Thanks
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