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PC/SR · 05-09-2022, 08:43 PM

Nothing wrong with the cylinder walls. They wear in and are shiney. Do not know what you mean by 25% loss of cylinder pressure, what is the actual reading? But, if you want to replace the rings while you are at it, just hone the walls unless you have a substantial ridge at the top. Then get a ridge reamer. Used to be able to rent them at rental shops. You can get a stone hone at Napa for home use which is fine for stock use. No need to get a machinist to do it for a basic ring job. As noted, used to be just normal maintainance. Do not worry about the babbitt. The carbon on the pistons is not excessive so I would say your rings and valves are fine. Sounds to me like you have basically good engine,.

05-09-2022, 08:43 PM	#9
PC/SR Senior Member Join Date: May 2010 Location: Santa Rosa, CA Posts: 1,285	Re: Reflecting cylinder walls Nothing wrong with the cylinder walls. They wear in and are shiney. Do not know what you mean by 25% loss of cylinder pressure, what is the actual reading? But, if you want to replace the rings while you are at it, just hone the walls unless you have a substantial ridge at the top. Then get a ridge reamer. Used to be able to rent them at rental shops. You can get a stone hone at Napa for home use which is fine for stock use. No need to get a machinist to do it for a basic ring job. As noted, used to be just normal maintainance. Do not worry about the babbitt. The carbon on the pistons is not excessive so I would say your rings and valves are fine. Sounds to me like you have basically good engine,. Last edited by PC/SR; 05-09-2022 at 08:49 PM.