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top of pistons rebuild #1590926 10/31/2025 4:17 PM
Joined: Mar 2024 Posts: 126 clarksville GA M mikeg1955 'Bolter
mikeg1955 'Bolter M Joined: Mar 2024 Posts: 126 clarksville GA	Hey everyone just a quick question. I have a 1960 235 in my 55 2nd series and I rebuilt the head a few months ago and noticed that the top of the pistons did not have a stamp on them such as 10 0r 20 or 30 over. the ring ridge at the top of the. cyl was very small. any help would be appreciated. 1955 second series 3200

Re: top of pistons rebuild mikeg1955 #1590927 10/31/2025 4:28 PM
Joined: Oct 2019 Posts: 411 Morganton GA 1 1955 1 Series 'Bolter
1955 1 Series 'Bolter 1 Joined: Oct 2019 Posts: 411 Morganton GA	Probably std bore still. If that was the first valve job, then I would say it is original bore.

Re: top of pistons rebuild mikeg1955 #1590928 10/31/2025 4:28 PM
Joined: Jan 2022 Posts: 2,493 Morris Ranch Texas B Bill Hanlon 'Bolter
Bill Hanlon 'Bolter B Joined: Jan 2022 Posts: 2,493 Morris Ranch Texas	What is the question? Chevy 235 had a bore of 3 9/16" ( 3.5625" ). Measure the diameter of the ring ridge to see if yours is still stock bore. '57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12 '52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.

Re: top of pistons rebuild Bill Hanlon #1590930 10/31/2025 4:39 PM
Joined: Mar 2024 Posts: 126 clarksville GA M mikeg1955 'Bolter
mikeg1955 'Bolter M Joined: Mar 2024 Posts: 126 clarksville GA	question is. do all the engines that are rebuilt and bored ove standard size have a stamp on top of the piston thanks 1955 second series 3200

Re: top of pistons rebuild 1955 1 Series #1590931 10/31/2025 4:40 PM
Joined: Mar 2024 Posts: 126 clarksville GA M mikeg1955 'Bolter
mikeg1955 'Bolter M Joined: Mar 2024 Posts: 126 clarksville GA	thats what I thought also thanks 1955 second series 3200

Re: top of pistons rebuild mikeg1955 #1590946 10/31/2025 9:21 PM
Joined: Feb 2004 Posts: 29,875 Dellrose, TN H Hotrod Lincoln Kettle Custodian (pot stirrer)
Hotrod Lincoln Kettle Custodian (pot stirrer) H Joined: Feb 2004 Posts: 29,875 Dellrose, TN	Not necessarily- - - -I've seen oversize pistons without a size marking, but most of them do. A simple $20.00 dial caliper from Ebay or Harbor Freight will be accurate enough to get a ballpark guesstimate about bore size. Standard 235 bore: 3.5625 .020 oversize: 5.5825 .030: 3.5925 .040: 3.6025 Etc.! 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!

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