4. DISASSEMBLY, INSPECTION AND REASSEMBLY OF ENGINES 4.3.5 Parts inspection and measurement (1) Camshaft Mainly check the contact between the tappet and cam contact surface, bearing seizure and wear, and gear damage. (a) Shaft bend measurement Support the camshaft with V blocks. Rotate the camshaft and measure the runout at the center of the camshaft and at each journal with a dial gauge. Half of the runout is the bend. mm (b) Intake/exhaust cam height measurement mm (c) Camshaft and bearing hole measurement Measure the camshaft outside diameter with a micrometer.
The oil clearance shall be calculated by subtracting the measured camshaft outside diameter from the inside diameter of the camshaft bearing or bush- ing. The camshaft bushing at gear case side is measured with a cylinder gauge after insertion to the cylinder. 4-30 82E-5 – 98E-5 SERIES Item Standard Limit Bend 0 – 0.02 0.05 Model Standard Limit 3D82AE – 4D88E 38.600 – 38.800 38.350 4D94LE, (S)4D98E 43.400 – 43.600 43.150