I have a 83 240d which had a bent #3 cylinder intake valve. The head has been fixed but I need to replace the piston. I'm going to get new rings for the piston. The other cylinders were measuring 350-400psi.

Should I replace the rings on the other cylinder since I have the motor apart?

Do the cylinders need to be honed when new rings are installed?

I spoke with a guy that rebuilds engines and he said just to replace the rings when you put the new piston in and not worry about doing anything to the cylinder.

Any thoughts?

Thanks for any help.

pete