Strange cylinder markings

[KenvLavigne]

I have these strange circular ring marks on everyone of my 440 cylinders. They are all in exactly the same place on every cylinder. The is a 71 casting for a 72 model year engine sitting in my 70 charger. Any ideas what these are caused from?

 

[gtxdana]

That cylinder wall wear is from the rings.

 

[Rebelrouser]

I have these strange circular ring marks on everyone of my 440 cylinders. They are all in exactly the same place on every cylinder. The is a 71 casting for a 72 model year engine sitting in my 70 charger. Any ideas what these are caused from?

View attachment 1776607

View attachment 1776608

Hard to tell without some more disassembly. To suggest what to look for, endgap of rings too tight, carbon buildup hanging rings in the piston lands, poor hone job on last rebuild.

 

[lewtot184]

Maybe ring flutter from detonation?

 

[KenvLavigne]

That cylinder wall wear is from the rings.

Wow! I never thought is was from the installed rings…but I guess is must be as the other responses are similar.
Thanks

 

[KenvLavigne]

Hard to tell without some more disassembly. To suggest what to look for, endgap of rings too tight, carbon buildup hanging rings in the piston lands, poor hone job on last rebuild.

Thank you. Must be something like that I guess. Weird tho

 

[KenvLavigne]

Maybe ring flutter from detonation?

Maybe! I never heard any pinging but maybe from the last owner…?

 

[T Brashears]

The ridge looks minimal. Some ring wear in the cylinder where the ring stops and
the piston changes direction is normal. That looks like the oil rails rocking,I'd want to check the ring side clearances.