Hi,
I recently made the mistake of buying a 9N3 Polo 1.2 with the 3 cylinder BMD engine. It was using a lot of oil, so the head is off and currently being rebuilt, however I think it also needs piston rings. I know the official guidance is not to remove the pistons on these engines, but have also heard of people successfully replacing the rings.

Has anybody done this and kept the car long enough to know if the engine was OK afterwards?

Thanks in advance.

Geoff