Overview - High Pressure Pump
WARNING: This page is about a different car, the 2011 Audi Q7, 2010 Audi Q7, and 2009 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Follow the points below to avoid running the high pressure fuel pump dry (very low tolerances) and to start the engine quickly after replacing the components:
- If fuel system components between the fuel tank and high pressure fuel pump are removed or replaced, then a fuel first filling must be performed.
- It is necessary to bleed the fuel system before starting the engine for the first time if the fuel pump, the fuel line (between the fuel tank and the high pressure fuel pump) or the fuel filter were removed.
- If the high pressure fuel pump was removed or replaced, then bleed the fuel system before starting the engine for the first time.
Fill the fuel tank after installing the high pressure pump. Refer to FUEL TANK, FILLING WITH FUEL AFTER INSTALLING HIGH PRESSURE PUMP .
- Bolt
- M6: 9 Nm
- M8: 23 Nm
- High Pressure Pump Bracket
- Bolt
- 9 Nm
- Shield
- High Pressure Line Union Nut
- Tightening specification. Refer to HIGH PRESSURE LINES, INSTALLING .
- High Pressure PumpCAUTION:
- Perform the following points before installing the toothed belt:
- Align the crankshaft TDC. Refer to Fig 2 to the camshaft TDC. Refer to Fig 3.
- Stop the high pressure pump toothed belt using the High Pressure Pump Sprocket Locking ToolT40135. (Do not allow the toothed belt to swing!). Refer to Fig 4.
- The high pressure pump must be filled with fuel before starting the engine for the first time. Do not let the high pressure pump run dry. Refer to FUEL TANK, FILLING WITH FUEL AFTER INSTALLING HIGH PRESSURE PUMP .
- Follow the guidelines for a clean working environment when working on the fuel system. Refer to CLEAN WORKING CONDITIONS AND FUEL SYSTEM WORK INSTRUCTIONS .
- The adaptation values must be adapted after replacing the high pressure pump or the Fuel Pressure Regulator Valve -N276-. Refer to "Guided Functions" using the Vehicle Diagnostic Tester.
- Remove the high pressure pump toothed belt using the Puller - PulleyT40064. Refer to Fig 5.
- Removing and installing. Refer to HIGH PRESSURE PUMP, REMOVING AND INSTALLING .
- Clamp
- Only use standard production hose clamp. Refer5 g.
- Fuel Supply Hose
- Fuel Return Hose
- The fuel return line must not be bent, damaged or plugged
- Clamp
- Only use standard production hose clamp. .
- High Pressure Line Union Nut
- Tightening specification. Refer to HIGH PRESSURE LINES, INSTALLING .
- Bolt
- 23 Nm
-- Remove the high pressure pump toothed belt with the Puller - PulleyT40064.