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| | | | Joined: Mar 2024 Posts: 126 'Bolter | | 'Bolter Joined: Mar 2024 Posts: 126 | Hey can help me with the information on the engine I have found a new rebuilt head from a good friend? Head cast # 3835913 and inside valve cover F224. Block casting date CON4 F224 and casting# 3835911.
Behind distributor is 037681T54Z and my friend said it's a 1954. I am thinking of buying the engine, just need to know more about it.
Thank you
Last edited by Gdads51; 05/05/2024 1:28 PM. Reason: edit text for better info and move to Engine Shop forum
1955 second series 3200
| | | | | Joined: Sep 2009 Posts: 5,775 Gearhead, Stovebolt Tech and Parts Tracker, Mod for Swap Meet and GTT | | Gearhead, Stovebolt Tech and Parts Tracker, Mod for Swap Meet and GTT Joined: Sep 2009 Posts: 5,775 | Mike, Engine decoding: Block Casting#: 3835911 = 1953-54 235 / Block Casting Date: F224 = June 22, 1954 Head Casting#: 3835913 = 1954-55 235 w/small temp sender port / Head Casting Date: F224 = June 22, 1954 Engine Serial# 037681T54Z = 037681 is the sequence number / T = Tonawanda Plant / 54Z = 1954 Passenger car with standard transmission Best of luck with your planned purchase! 
~ Dan 1951 Chevy 3 window 3100Follow this story in the DITY Gallery"My Grandpa Carl's Truck and How it Became Mine"1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
| | | | | Joined: Feb 2004 Posts: 29,742 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,742 | The 913 head casting was used on 1954-56 235 full pressure oiler engines. It has a slightly lower compression ratio than the 848 head(56-63) but it can be milled .090" to equal the 848 compression. Recess the intake valves back into the head the same distance to preserve the "quench trench" that keeps the valves from burning if you choose to mill that head. Either head will be a bolt-on fit to pressure oiler 235s or 261 engines.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Jun 2022 Posts: 557 'Bolter | | 'Bolter Joined: Jun 2022 Posts: 557 | Doesn't one have to drill steam holes for the 261?
~~ Jethro 1954 3100Back to LifeIn the Dity Gallery1951 3100 (gone) / 1956 4400 (still in the neighborhood) / 1957 6400 with dump body (retired) / 1959 3100 panel (in the woods junked) / 1978 Custom Deluxe K10 / 1993 S-10 4.3 / 2004 Chevy Crew Cab / 1945 John Deere H / 1952 John Deere B / 1966 John Deere 2510 / 1967 John Deere 1020 | | | | | Joined: Feb 2004 Posts: 29,742 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,742 | The "steam" holes actually flow coolant- - - -once it turns to steam, you've got a major overheating problem going on. 261 cylinder bores are so big that the cylinders are cast in three groups of two, with a "figure eight" shape- - - -no room between them for coolant to get all the way around the cylinders. To promote good coolant flow, the block and the head has three pairs of 3/16" holes drilled to allow coolant to flow vertically from the block to the head, and improve the cooling along where the siamesed cylinders join up. The small block 400 V8 engine is made the same way, and has the same kind of coolant holes drilled in the block and the head. If you put a 235 passenger car or truck head on a 261, regardless of the casting number, you'll need to drill the coolant flow holes, using a 261 head gasket as a drilling template. The holes are also drilled at a slight angle- - - -not straight into the gasket surface of the head- - - -12 degrees, I believe. There's a tech tip on this site somewhere that shows a cutaway of a 261 head, showing where and at what angle to drill the coolant passages.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Mar 2024 Posts: 126 'Bolter | | 'Bolter Joined: Mar 2024 Posts: 126 | Thank you so much Dan for the information
1955 second series 3200
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