78 ENGINE COMPONENT AND LOCATION 1. Exhaust Brake Cam 3. Injector Cam W2033303 2. Exhaust Cam 4. Inlet Cam Rollers in the ends of the rocker arms contact the cam shaft. The contacts with the yokes have ball sockets for flexibility. The camshaft is induction-hardened. Timing marks for valve and injector adjustment are located on the flange forward of the No. 1 camshaft journal. These marks are for adjusting valve clearance. They do not apply to camshaft timing. Camshaft thrust washers are integral on the No. 7 journal bearing. Smooth rotation is ensured by means of a vibration damper on the camshaft gear. Teeth on the damper interact with the camshaft position sensor for input to the EECU.