OTC EN-48953 OTC-EN-48953 Cam Phaser Retainer
The camshafts on the ECOTEC engines must be held when removing or installing the cam phaser bolts, or the timing chain may slip and not keep its relationship to the phasers. EN-48953 mounts to the front of the block and its tabs engage both cam phasers to hold them so the phaser bolts may be serviced. A pass-through hole on each side allows a socket to be used to remove or install the phaser bolt. Current service methods use an open end wrench to hold the cam, and can be very awkward, especially for in-vehicle service.