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Is it safe to say the 261 engine is identified by its " captains bars " ....... or were 261 engines manufactured without the" captains bars ", as well ?
1951 Chevy Styleline Deluxe 2 door sedan / purchased from second owner 6-19-2000.
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The safe way is to get the block casting number from behind the starter.
Gene Schneider
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Gene .... So, are you saying the " captains bars " were not necessarily shown on the 261 engines ?
I was always under the impression that the captains bars were always " part " of the 261 identification..
1951 Chevy Styleline Deluxe 2 door sedan / purchased from second owner 6-19-2000.
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I believe they may bo on some 235 blocks also.
Gene Schneider
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Backyard Mechanic
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Yes, the bars can be found on some 235's...... perhaps the truck engines? I "use" to remember but time takes it toll. I feel sure all 261's had them but have no documentation handy right now for either one.
1937 Chevy 1/2 ton Pickup
1950 Chevy Styleline Deluxe Coupe
1953 Chevy 1/2 ton Panel Delivery
I'd rather walk and carry a Chevy hubcap than ride in a Ferd.
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Although they are claimed to exist..... I have never run across a 261 block that did not have the captains bars.
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Get the "stamped on the ledge" engine number first. Easy to see.
Gene Schneider
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It seems then, the only TRUE WAY to identify the 261 is either the casting number or the serial number ..... and do not depend on captains bars, or no captains bars.
Thanks for the replies, folks.
1951 Chevy Styleline Deluxe 2 door sedan / purchased from second owner 6-19-2000.
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Backyard Mechanic
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Another true way is the simesed cylinders with the added coolant holes between the "sets" of cylinders. Just as added reading and information: Some folks refer to them as "steam holes"....and before someone ask, yes a 235 head will fit on the 261 but be sure to drill the matching coolant holes in the head. I just did one a couple years ago and used the head gasket to mark the head. You can drill them straight into the head but to do it right they need to be at an angle to be sure to "center" the holes in the coolant passage. https://photos.google.com/share/AF1...Nko1cUJCNFFMTVFEUnNRbjFhNTFPc1J4YWV4cmRB.
Last edited by Achipmunk; 04/28/18 12:28 AM.
1937 Chevy 1/2 ton Pickup
1950 Chevy Styleline Deluxe Coupe
1953 Chevy 1/2 ton Panel Delivery
I'd rather walk and carry a Chevy hubcap than ride in a Ferd.
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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But how can you tell if an engine has simesed cylinders with out cutting the block apart.? ....or removing the head and measuring the bore.
If the 261 engine has the correct water pump the 1954 261 engine will have a 1 3/4" lower hose outlet rather than a 1 1/2".
Last edited by Chev Nut; 04/28/18 09:54 AM.
Gene Schneider
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Backyard Mechanic
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1937 Chevy 1/2 ton Pickup
1950 Chevy Styleline Deluxe Coupe
1953 Chevy 1/2 ton Panel Delivery
I'd rather walk and carry a Chevy hubcap than ride in a Ferd.
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Joined: Feb 2008
Posts: 3,801 Likes: 1
ChatMaster - 3,000
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1951 Chevy Styleline Deluxe 2 door sedan / purchased from second owner 6-19-2000.
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