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#5313 10/06/2002 10:08 PM | Joined: Oct 2002 Posts: 99 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2002 Posts: 99 | I'm trying to determine the displacement of the engine in my 1955 3200... I took your advice and copied down the numbers on the block, but when I compaired it to the list I found off of this site it said it could be either a 235 or a 261. These are the numbers I got: the engine casting number says 3837004 with GM5T nearby; the serial # says 0532002T255S with a larger C at the end; finally, I found a number between the starter and the block and it said CGNV1 10J17 55 (I'm not sure if the C and G are correct though... I was having a hard time reading it). I didn't notice any captain's marks on the block, but I could have overlooked them. If anyone has any information or could point me in the right direction I would really appreciate it. Thanks!
Neil
1955 Chevy 3200
| | | | | Joined: Oct 2001 Posts: 3,458 Extreme Gabster | | Extreme Gabster Joined: Oct 2001 Posts: 3,458 | What is the casting number on the head and what is the oil line diameter and what is the thermostat diameter? If it has an '848' head chances are it's a 235.
Paint & Body Shop moderator
A lone amateur built the Ark. A large group of professionals built the Titanic. | | | | | Joined: Jan 2000 Posts: 2,074 'Bolter | | 'Bolter Joined: Jan 2000 Posts: 2,074 | My list of block numbers shows 3837004 as a 55-57 235. | | | | | Joined: Feb 2000 Posts: 987 'Bolter | | 'Bolter Joined: Feb 2000 Posts: 987 | Milhouse I too have a 3837004 block and mine is a 235. Captian bars would be on both sides of the block if you had a 261. One of the easier ways to tell a 261 from a 235 is the size of the hole for the oil lines to the filter and sending unit on the drivers side rear of the block. The 261 has 3/4" pipe fittings (very large). Otherwise for the 235 it will be 1/4" or 3/8" pipe threads
Brian Moore
1949 3100 5 window Deluxe
"Today is better than yesterday, but not as good as tomorrow"
| | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | Do the '54-'57 261s have the large holes for the oil-filter lines; or, are the larger holes only on the '58-'62 261s (that had full-flow oil filtration systems)? For more information on 261s, check out Jim Carter's technical article on "The Forgotten 261 Six Cylinder" (it's not forgotten on this forum). http://www.oldchevytrucks.com/cgi-bin/htmlos.cgi/001097.2.5428224320315357751 Tim | | |
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