4. Disassembly, Inspection and Reassembly of Engines874.3.5 Parts inspection and measurement(1) CamshaftMainly check the contact between the tappet and cam contact surface, bearing seizure and wear, andgear damage.(a) Shaft bend measurementSupport the camshaft with V blocks. Rotate thecamshaft and measure the runout at the center of thecamshaft and at each journal with a dial gage. half ofthe runout is the bend.mmItem Standard LimitBend 0 0.02 0.05(b) Intake/exhaust cam height measurementmmModel Standard Limit3TNV82A 88 38.600 38.800 38.3504TNV94L･98 43.400 43.600 43.1504TNV106(T) 50.900 51.100 50.650(c) Camshaft outside diameter and bearing holediameter measurement Measure the camshaftoutside diameter with a micrometer. The oilclearance shall be calculated by subtracting themeasured camshaft outside diameter from thethe camshaft bushing inside diameter afterinsertion to the cylinder measured with a cylindergage.
