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How do you ID a pressure oiled 261 as compared to a 235? #1154872 03/14/2016 1:49 AM
Joined: Dec 2007 Posts: 171 Utah B Big Al's Shop Shark
Big Al's Shop Shark B Joined: Dec 2007 Posts: 171 Utah	I have run across an old junk 3/4 ton GMC with.....of all things, what appears to be a later model full pressure oiled Chevrolet engine. Hmmmmmm, I wonder what they were thinking? :-) My question, how can I tell, quickly, if the engine is a 235 or a 261. Alan 1947 (early) GMC EC-302 Dump Truck Jimmy In the Stovebolt Gallery More pix in Photobucket

Re: How do you ID a pressure oiled 261 as compared to a 235? Big Al's #1154875 03/14/2016 2:05 AM
Joined: Mar 2011 Posts: 1,146 Wis J jorb Shop Shark
jorb Shop Shark J Joined: Mar 2011 Posts: 1,146 Wis	It will have Captain's Bars Check picture The Forgotten 261 6 Cylinder Engine Tech article & pictures 1954 Chevrolet 3105 Deluxe Panel Truck w/Factory HYDRA-MATIC

Re: How do you ID a pressure oiled 261 as compared to a 235? jorb #1154879 03/14/2016 2:17 AM
Joined: Mar 2011 Posts: 1,146 Wis J jorb Shop Shark
jorb Shop Shark J Joined: Mar 2011 Posts: 1,146 Wis	To be sure, you really need the Block casting code. Click on pictures to enlarge 1954 Chevrolet 3105 Deluxe Panel Truck w/Factory HYDRA-MATIC

Re: How do you ID a pressure oiled 261 as compared to a 235? Big Al's #1154882 03/14/2016 2:32 AM
Joined: Sep 2001 Posts: 29,270 Jarvisburg, NC, USA tclederman Bubba - Curmudgeon
tclederman Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,270 Jarvisburg, NC, USA	The engine serial number pressed into the block at the rear of the distributor might tell you/us what you have. Here are locations of ID codes on the engine: http://www.1954advance-design.com/Web%20images/casting-code-photos/codes-ser-nums.html Tim 1954Advance-Design.com 1954 3106 Carryall Suburban 1954 3104 5-window pickup w/Hydra-Matic The 216 and early 235 engines are not "splash oilers" -- this is a splash oiler.

Re: How do you ID a pressure oiled 261 as compared to a 235? Big Al's #1155591 03/18/2016 12:24 PM
Joined: Nov 1995 Posts: 5,742 Skyline, Alabama John Milliman 24601
John Milliman 24601 Joined: Nov 1995 Posts: 5,742 Skyline, Alabama	Just a note: If the tech tips on this subject here on Stovebolt.com aren't helpful, it would be good to know so we can update them. Thanks. John ~ John A kid raised on Hotwheels, Matchbox and Tonka cannot be reasonably expected to own only one vehicle as an adult. 1949 Chevrolet 3804 In the Legacy Gallery \| In the Gallery Forum 1973 IH 1310 Dump 1963 Kaiser M38A1 2001 International/AmTran RE3000 "Skoolie" 2014 Ford E-350 4x4 (Quigley)

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