Verify your overhead settings are correct as well.
Overhead Set QSX15
Page 6-4 Section 6 - Maintenance Procedures at 6000 Hours or 2 Years
NOTE: Read the entire procedure for overhead
adjustment before attempting to perform this operation.
Valves, injectors, and engine brakes (if equipped) must
be correctly adjusted for the engine to operate efficiently.
Valve, injector, and engine brake adjustment must be
performed using the values listed in this section.
Adjust the valves, injectors, and engine brakes every
800,000 km [500,000 mi], 10,000 hours, or 5 years
(whichever occurs first). Adjustment must be made after
any major repair. After a major repair, the adjustment
interval again becomes every 800,000 km [500,000 mi],
10,000 hours, or 5 years (whichever occurs first).
Signature, ISX, and QSX15
Valve, Brake, and Injector
Signature, ISX, and QSX15 Injector Adjustment is
8 N•m [70 in-lb]
Intake Valve 0.35 0.014
Exhaust Valve 0.68 0.027
Engine Brake 7.00 0.276
NOTE: Make sure the engine base timing is properly set
before attempting to adjust/set the overhead. Refer to
All overhead valve, injector, and brake adjustments
must be made when the engine is cold (any stabilized
coolant temperature at 60°C [140°F] or below).
NOTE: After an engine rebuild or any major repair where
the injector and valve setting must be disturbed, set all
the valves and injectors and brakes.