BOLT-FLANGE HEAD 9S2009 - Caterpillar

Industrial Engine:
3054C (S/N: 334562-UP)
C4.4 (MECH) (S/N: 4461-UP)
Engine:
C4.4 (S/N: MMC1-UP; XYC1-UP; NCD1-UP; N4D1-UP; XYD1-UP; NCE1-UP; N4E1-UP; L1K1-UP; S1M1-UP; N4R1-UP; N4X1-UP)
There have been isolated issues with cylinder head gaskets that leak. This has caused an increase of pressure of the coolant system.Install a new cylinder head gasket. Refer to Disassembly and Assembly, "Cylinder Head - Install".If the original issue is the gasket for the cylinder head and no cause can be found with the cylinder head gasket, the cylinder head, fasteners and the cooling system package needs to be checked. If there is not an issue with the cylinder head, fasteners or the cooling system package, remove the fuel injection pump. Refer to Disassembly and Assembly, "Fuel Injection Pump - Remove".The fuel injection pump must be taken to the nearestDelphi distributor in order to be checked to the test plan. A fuel injection pump that does not meet the specification of the test plan will cause issues with engine performance. If theDelphi distributor finds damage to the advance box of the fuel injection pump. This can lead to advanced injection timing of the fuel injection pump. This will result in high cylinder pressures due to the advanced timing of the fuel injection pump. This can lead to issues with the cylinder head gasket. This is indicated by the discharge of coolant from the expansion tank pressure cap.Note: The advance box of the fuel injection pump can be damaged by trapped air.Air that is present in the fuel can collect in the advance box of the fuel injection pump. If the hydraulic damping for the fuel is not effective the movement of the automatic advance piston is uncontrolled. This can damage the cover plate, the O-ring seal and the fasteners. Investigations have shown that this can lead to fuel leaks. In extreme cases, the advance piston travel can shear the cover screws.Problems can occur within a few hours of the start of the engine, depending on the duty cycle and the amount of air in the fuel.The reasons that the air is introduced into the fuel system are listed below:
Running out of fuel and not priming the fuel injection pump correctly
The low pressure fuel supply system is poor. It is possible to draw in air through joints or connections on the engine and the fuel lines when there is no sign of fuel leaks.
Air can be drawn from suspension in the fuel if the fuel filter of the fuel transfer pump becomes congested. This causes a restriction.
The fuel transfer pump may not be operating correctly or the fuel transfer pump draws in the air via damage to the sealing ring of the fuel filter bowl.Ensure that the O-ring is seated correctly on the fuel filter bowl on the fuel transfer pump when the fuel filter element is replaced. Ensure that all supplied parts are installed correctly.To check for air in fuel, refer to Systems Operation, Testing and Adjusting, "Air In Fuel - Test" for the correct procedure.Note: Unless the cause