First way
Pic. 2.120. Checking clearance between valve stems and valve guides (first way)
Raise the valve head by 25 mm, then measure the movement of the valve in the direction of the arrows at an angle of 90°to the camshaft axis with the indicator. Half of the value obtained is equal to the value of the gap between the stem and the valve guide (pic. 2.120).
Second way
Measure the valve stem diameter and guide bushing inside diameter.
Pic. 2.121. Checking clearance between valve stems and valve guides (second way)
The clearance between the valve guide and the valve stem is calculated by subtracting the values of the two measured diameters (pic. 2.121).
Rated Clearance:
- for intake valves - 0.015–0.048 mm;
- for exhaust valves - 0.029–0.062 mm.