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Home >> Audi >> 2017 >> A7 Quattro Competition >> Repair and Diagnosis >> External Pages >> Different car >> Section 78 (3.0L - Diesel Fuel Injection - Engine Code: CPNB) >> 23 Diesel Fuel Injection >> Fuel Injectors/High Pressure Reservoir (Rail) >> High Pressure Reservoir (Rail), Removing And Installing >> Removing

High Pressure Reservoir (Rail), Removing And Installing: Removing

WARNING: This page is about a different car, the 2015 Audi A7 Quattro and 2014 Audi A7 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Wire Guide, Clamps And Bolts
GWWA23-10524Courtesy of AUDI OF AMERICA, LLC

-- Remove the engine cover, refer to ENGINE COVER, REMOVING AND INSTALLING .

-- Free up the wiring harness and hoses on the wiring guide -1- using the Pry Lever 80-200.

-- Pull coolant hose back -arrow-.

-- Remove the bolts -2 and 3- and move the wiring guide to the rear.

-- Open the union nuts from the respective fuel rail that must be removed.

Fig 2: Connectors, Check Valve & Bracket
GWWA23-10525Courtesy of AUDI OF AMERICA, LLC
NOTE:

-Left arrow- for the cylinder bank 1 fuel rail

-Right arrow- for the cylinder bank 2 fuel rail

Cylinder Bank 1 Fuel Rail 

Fig 3: Air Guide Pipe & Clamps
GWWA23-10600Courtesy of AUDI OF AMERICA, LLC

-- Open the clamps -arrows- and remove the air guide pipe -1-.

-- Remove the connectors -1 and 2- and the check valve -3- from the bracket.

Fig 4: Connectors And Check Valve
GWWA23-10526Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connector -arrow- from the Fuel Pressure Regulator Valve -N276-.

Fig 5: Fuel Pressure Regulator Valve -N276-
GWWA23-10534Courtesy of AUDI OF AMERICA, LLC

-- Remove the union nut -1- on the fuel rail.

Fig 6: Locating Bolt
GWWA23-10527Courtesy of AUDI OF AMERICA, LLC

-- Remove the banjo bolt -item 14-  14 for the fuel return lines from the fuel rail.

-- Open the high pressure line union nuts -2, 3 and 4-.

Fig 7: High Pressure Line Union Nuts & Open Lines And Connections
GWWA23-10545Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolts -arrows- from the fuel rail and carefully place on a clean surface.

-- Seal off all open lines and connections with clean plugs.

Cylinder Bank 2 Fuel Rail 

Fig 8: Connector, Bolt & Clamp
GWWA19-11120Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connector -1-.

-- Remove the bolt -3-.

-- Open the clamp -2- and remove the coolant line.

-- Move the coolant expansion tank to the side.

-- Seal off all open lines and connections with clean plugs.

-- Disconnect the connector from the Fuel Pressure Sensor -G247- -arrow-.

Fig 9: Fuel Pressure Sensor -G247- -arrow-
GWWA23-10535Courtesy of AUDI OF AMERICA, LLC

-- Unclip the bracket for the connectors -6 and 7-.

Fig 10: Component Locations for the Exhaust Gas Temperature Sensors (Only With The Engine Code CPNB)
GWWA23-10792Courtesy of AUDI OF AMERICA, LLC

-- Free up the wiring harness.

-- Remove the rear fuel supply line union nut on the fuel rail.

-- Open the union nuts for the high pressure lines between the fuel injectors and the fuel rail.

-- Remove the bolts from the fuel rail and carefully place on a clean surface.

-- Seal off all open lines and connections with clean plugs.