3-165.2. EXHAUST VALVE - MAINTENANCE INSTRUCTIONS (Continued).
Clean the spring with fuel oil
and dry with compressed air.
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 length).
Inspect the valve spring seats
and caps for wear. If worn,
Inspect the valve bridge guide, valve
bridge and adjusting screw for wear.
Replace excessively worn parts.