will it hurt. whats your opinion

trudysduster said
I dont know anything about this other than to get the cylinders bored and I dont want to go that far but I have a small ring wear at the top of the cylinder. I am going through this engine trying to keep it home to the original car. It is a 66 Valiant. slant 6. replacing rings, rod and main bearings, and after I got down this far I am replacing the camshaft, lifters. My question is I am going back with the same pistons. Will that ridge at the top be ok. I cant see that the new rings will get into it OR what is your opinion about using a ridge reamer to cut that ridge out. I have read both pro and cons about this and have never done it. If used will I lose compression. If I dont will the new rings hit the ridge and cause a problem. let me know what you think.

First question, how much ridge is there? As the cylinder and rings wear, they wear to match eachother slowly over time. Most of these old engines have a pretty square ridge that will catch the rings as you attempt to remove the pistons. Even with not a lot of wear, the new square rings will hit the rounded corner of the ridge and cause damage.
Being carbureted these engines did not meter the fuel.as well or atomize as well as the injected cars. New vehicles with 300k miles have minimal ridge in most cases.
You do not remove enough to affect compression.

66fs said
I don't like ridge reamers. It is easy to go too far. If you do use one, go light and finish hone. You don't have to get all the wear or ridge completely out.

These are the type of hone I would use. Crisco as lubricant.

[URL][URL]https://www.forabodiesonly.com/mopar/threads/lisle-15000-cylinder-hone.552918/[/URL][/URL]

A ridge reamer when trued to the cylinder and locked in will.not remove too much metal it is guided by the remaining cylider wall.