4.2.1. The bottom clearance adjusting value and the Cam classification Shape of cam shaft end 45 Cam shaft Plunger bottom Clearance (dimension: A) (mm) Standard shim thickness (mm) Cam speed 3 cylinder 4 cylinder MP2 1.1 m/s 158552-51020 158553-51020 25.5±0.05 1.3 1.3 m/s 158552-51030 158553-51030 25.9±0.05 0.9 1.7 m/s 158552-51040 158553-51040 26.3±0.05 0.8 MP4 1.8 m/s 123907-51040 25.55±0.05 1.05 2.1 m/s 129906-51040 2.3m/s 129907-51040 Cam Speed MP2 MP4 1.1m/s 2.3m/s 1.3m/s 2.1m/s 1.7m/s 1.8m/s