Pic. 2.232. Z6 engine components: 1 - drive belt; 2 - automatic tensioner of the drive belt; 3 - valve pusher; 4 – chain of a drive of the gas distribution mechanism; 5 – laying of a head of the block of cylinders; 6 - front oil seal; 7 - rear oil seal; 8 - engine; 9 - control oil valve (oil control valve); 10 - actuator for changing the valve timing