High Pressure Pump Assembly Overview
WARNING: This page is about a different variant/trim than selected.
WARNING:
Fuel system is under high pressure! Before opening the system, perform the procedure for releasing fuel pressure. Refer to BEFORE OPENING HIGH PRESSURE FUEL INJECTION SYSTEM .
- Air Deflector Plates
- Removable
- Check for damages and correct positioning
- Sleeve
- remains inserted in cylinder head after removing the high-pressure pump, removable
- O-Ring
- Replace
- Mechanical Single-Piston High-Pressure Pump
- An electrical fuel pump, located in the fuel tank, supplies fuel to the mechanical high-pressure pump at a pressure of approximately 6 bar.
- When installing the high-pressure pump, make sure that no dirt enters the fuel system.
- The fuel system must be pressureless, releasing fuel pressure, refer to BEFORE OPENING HIGH PRESSURE FUEL INJECTION SYSTEM
- Do not install fuel lines with tension
- Removing and installing, refer to HIGH PRESSURE PUMP
- Fuel Pressure Regulator Valve -N276-
- Low Fuel Pressure Sensor -G410-
- 15 Nm
- High-Pressure Pump Bolts
- 10 Nm
- Fuel Return Line to Fuel Tank Connection
- When replacing threaded supports, always leave old sealing ring in pump. It is pinched during initial assembly by the supplier and cannot be removed. The threaded support has a "biting edge" for sealing for this purpose.
- Fuel Supply Line to Fuel Rail Connection
- Replace connecting piece
- Tighten connections to 30 Nm
- Do not install fuel line with tension (ensure cleanliness), tightening specifications: 27 Nm
- Hole In Cylinder Head For High-Pressure Pump
- Fuel Injector
- Replace O-rings
- Note correct installation position
- Removing and installing, refer to FUEL INJECTORS