Measuring Camshaft Lobe Wear

1. To determine the degree of wear of the camshaft cam, the height of the cam should be measured before removing the camshaft. Since the camshaft cannot be removed without removing the engine, its removal and installation are covered in part C.

2. Remove the cover (And) valve mechanism (section 3).

3. Set piston #1 to TDC on the compression stroke (section 5).

4. Starting with cylinder #1 valves, install a dial gauge in the engine and place the plunger against the top of the first valve lever. The plunger must be exactly above and in line with the push rod.



5. Set the indicator to zero, then rotate the crankshaft very slowly in the direction of its normal rotation until the indicator needle stops and begins to move in the opposite direction. The stop point indicates the maximum amount of lift of the cam circuit.

6. Remember the resulting value, then return the piston to TDC on the compression stroke.

7. Move the indicator to the next valve lever of the first cylinder and repeat the test. Memorize values for each valve

8. Repeat the test for the remaining valves. Since each of the pistons must be set to TDC on the compression stroke, carry out the work in the sequence corresponding to the ignition order.

9. At the end of the test, compare the results with the specification. If the lift of the cam contour is less than required, then it is worn out and a new camshaft must be installed (see chapter 2C).