3-33.2. EXHAUST VALVE - MAINTENANCE INSTRUCTIONS (Cont).
REMOVAL - CYLINDER HEAD ON ENGINE (Cont)
Use eye protection when using compressed air.
Clean the spring with fuel oil and dry it with com-
pressed air. Then, inspect the spring for pitted or
fractured coils. Use spring tester and an accurate
torque wrench to check the spring load.
The exhaust valve spring has an outside diameter of
approximately 61/64 inch (2.4209 cm). Replace this
spring when a load of less than 25 pounds (11.35 kg)
will compress it to 1.80 inch (4.57 cm) (installed
Inspect the valve spring seats and caps for wear. If