rotor 106 and front cover locking pin interface 115 in front cover 110 the locking contour may also be in the sprocket cover 101 locking pin cartridge 105 maintains only a slipping or loose interface with locking pin interface 113 on sprocket cover 101 as during operation and rotation of rotor 106 there is relative movement between sprocket cover 101 and locking pin cartridge 105 locking pin 103 is inserted through the rotor 106 in order to fix the position of the rotor 106 relative to the housing 109 particularly during engine startup when the cam phaser 100 has no oil pressure supply for it to operate leaf springs 108 are inserted into sealing lips 107 which are then inserted into corresponding sealing lip grooves 116 in corresponding vanes 118 of rotor 106 when rotor 106 is assembled into housing 109 sealing lips 107 contact housing inner surface wall 117 of housing 109 preventing pressurized fluid such as engine oil from moving between pressurized chambers formed by space between vanes 118 and corresponding housing protrusions 119 sprocket cover 101 and front side cover 110 are then placed in contact with either side of the assembled rotor 106 and housing 109 and assembly bolts 102 are fixedly assembled through sprocket cover holes 120 in sprocket cover 101 housing holes 121 in housing 109 and side cover holes 122 in front side cover 110 in turn drive screws 112 are inserted through sensor wheel 111 and into drive screw bores 128 in rotor 106 in order to fix the position of the sensor wheel 111 relative to rotor 106 at least during transportation of cam phaser.