Cylinder Head and Valves
PERFORM ENGINE BREAK-IN
1. Run engine at slow idle no load for 2 minutes. Check
for liquid leaks.
2. Increase RPM to fast idle, then load down to 50 rpm
above rated speed for 20 minutes.
NOTE: Dynamometer is the preferred load control, but
engine can be loaded by matching drag loads to
3. Recheck valve clearance and adjust as necessary.
(See CHECK AND ADJUST VALVE CLEARANCE,
earlier in this group.)
4. Install rocker arm cover gasket and cover. Tighten
rocker arm cover cap screws to 8 N· m (6 lb-ft)
INJECTION PUMP SIDE OF ENGINE, earlier in this
Retorque of cylinder head cap screws after engine
break-in is not required.
IMPORTANT: After engine break-in, follow ALL
recommended hourly service intervals
outlined in your Operator's Manual.