Valve and Valve Springs

CLEANING
Clean the valve stems with crocus cloth or a Scotch-Brite pad. Remove carbon with a soft wire brush. Clean valves, springs, retainers, and collets in a suitable solvent. Rinse in hot water and blow dry with compressed air.

INSPECTION





Fig. 222

Visually inspect the valves for abnormal wear on the heads, stems, and tips. Replace any valve that is worn out or bent (Fig. 222).





Fig. 223

Measure the valve stem diameter in three places as shown in (Fig. 223).





Fig. 224

Measure the cylinder head valve guide bore (Fig. 224). Subtract the corresponding valve stem diameter to obtain valve stem-to-guide clearance.





Fig. 225

Measure valve margin (rim thickness) (Fig. 225).





Fig. 226

Measure the valve spring free length and maximum inclination (Fig. 226).





Fig. 227

Test valve spring force with tool C-647 (Fig. 227).