Timing Gear
Measure camshaft gear runout with dial indicator. Replace camshaft if runout exceeds 0.010" (0.25 mm). Measure backlash between camshaft gear and crankshaft gear. If backlash exceeds 0.0039" (0.10 mm), replace camshaft gear. Standard value of backlash is 0.0004 - 0.0020" (0.01 - 0.05 mm).