Unit 4 bonding and naming compounds
May 04, 2015 · BMW N63 engine common problems and issues. 1. High Oil Consumption. This problem is connected with the gummed piston ring grooves and degradation of the piston rings. Such failure may appear on the engines N63 with the distance of run 30,000+ miles (50,000+ km). In such cases it is necessary to make an overhaul with replacing the piston rings. 2.