Re: [MBZ] Hello again, and back to my 240d battle

[Peter Frederick]

There is no magic repair for a worn out cylinder -- if a ring is broken 
(or badly stuck, etc), the liner will by now be worn to the point the 
rings cannot reliably seal, resulting in no compression cold.  No 
amount of jacking around on it will do anything but increase the wear, 
your only real options are a replacement engine from the junkyard or a 
rebuild.

Peter