The first way.
Raise the valve head by 25 mm, then measure the valve movement with an indicator in the direction of the arrows at an angle of 90° to the camshaft axis. Half of the obtained value is equal to the value of the gap between the stem and the valve guide.
Checking the clearance between the valve stems and guide bushings (first way)
The second way.
Measure the valve stem diameter and the inside diameter of the valve guide.
Original version on our portal: RENAULTBOOK.ru
The clearance between the valve guide and the valve stem is calculated by subtracting the two measured diameters.
Checking the clearance between the valve stems and guide bushings (second way)
Nominal clearance:
- for intake valves - 0.015 - 0.048 mm;
- for exhaust valves - 0.029 - 0.062 mm.