99
N55 Engine
Cylinder Head
The combination of exhaust turbocharger, Valvetronic, and direct fuel injection is referred
to as Turbo-Valvetronic-Direct-Injection (TVDI).
Cylinder Head Cover
Note: If a customer complains about high oil consumption and oil is
discovered in the turbocharger, it should not be immediately
assumed that the turbocharger is defective.
If the oil is present in the fresh air pipe after the introduction of the
blow-by gasses then the entire engine should be checked for leaks.
Defective gaskets or crankshaft seals may be the cause of excessively
high blow-by gas output.
Fuel Injectors
In order to remove the N55 fuel injectors from the cylinder head, special tool #13 0 270
must be utilized. Failure to use the special tool will result in damage to the injectors.
Note: Do not open the high pressure fuel injection system if the coolant
temperature is above 40°C . The residual pressure in the high pressure
fuel system could cause bodily injury.
Service Information
Summary of Contents for N55
Page 29: ...29 N55 Engine N55 oil passages front view...
Page 35: ...35 N55 Engine N55 crankcase ventilation naturally aspirated mode...
Page 37: ...N55 crankcase ventilation turbocharged boost mode 37 N55 Engine...
Page 57: ...N55 Air Intake and Exhaust System 57 N55 Engine...
Page 83: ...83 N55 Engine Circuit Diagram N55 circuit diagram connection to vehicle electrical system...
Page 85: ...85 N55 Engine Engine Cooling Circuit Diagram N55 circuit diagram engine cooling...
Page 88: ...88 N55 Engine Digital Motor Electronics Circuit Diagram N55 MEVD17 2 Circuit Diagram...