Description Reviews MINI Cooper Valve Cover Bolt 11-12-1-487-179. This is a replacement bolt for all Gen 1 MINI Cooper and MINI Cooper S's (R50, R52, R53). This is a special m6x1.00 threaded bolt (40mm total length) with special collar that will only allow it to be tightened to a certain depth and has a special sealing ring to keep oil in and air out. The car came with 8; but it really uses 9 if you delete one of the studs. These really only need replacing when they rust and can't get them out when the head rounds out. DT Tip: Jam an English socket onto it if it becomes rounded. It can help to take it out rather than cutting or drilling. Note: Torque to 9 ft lbs.