6. CYLINDER HEAD/VALVES K-XCT 125i INSPECTION Camshaft Inspect camshaft lobes for pitting/scratches/blue discoloration. If any defects are found, replace the camshaft with a new one, then inspect lubrication Camshaft Bearings system. Check each camshaft bearing for play or damage. Replace the camshaft assembly with a new one if the bearings are noisy or have excessive play. 6-9