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Home >> Audi >> 2011 >> S5 4.2, Standard >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Cylinder Head, VALVETRAIN [CAUA] (Coupe) >> 15 Cylinder Head, VALVETRAIN >> Timing Chain Cover >> Timing Chain Cover, Removing And Installing >> Right Timing Chain Cover, Removing And Installing >> Removing

Right Timing Chain Cover, Removing And Installing: Removing

-- Drain the coolant. Refer to COOLANT, DRAINING AND FILLING .

-- Remove the right front muffler. Refer to FRONT MUFFLER, REMOVING AND INSTALLING .

-- Remove the tower brace. Refer to TOWER BRACE, REMOVING AND INSTALLING .

Fig 1: Identifying Bolts, Nuts And Tower Brace
GWWA40-10127Courtesy of AUDI OF AMERICA, LLC

-- Remove the plenum chamber bulkhead. Refer to LOCK CARRIER .

-- Remove the Heated Oxygen Sensor -G39- -1-. Refer to HEATED OXYGEN SENSOR -G39- /OXYGEN SENSOR AFTER THREE WAY CATALYTIC CONVERTER -G130-, REMOVING AND INSTALLING, CYLINDER BANK 1 .

Fig 2: Component Location: Cylinder Bank 1 (right) Oxygen Sensors
GWWA24-10274Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connector from the bracket:

2 - For Oxygen Sensor after Three Way Catalytic Converter -G130-

NOTE:

Ignore items -3 and 4-.

The Installation Location Is Shown With The Engine Removed.

-- Remove the nuts -arrows- using :T40220  .

Fig 3: Identifying Nuts And Bolt, Removal
GWWA26-10537Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolt -1-, remove the right catalytic converter and lay it to the side.

NOTE:

The Installation Location Is Shown With The Engine Removed.

-- Free up the fuel line and the line to the Evaporative Emission (EVAP) canister on the air guide pipe.

Fig 4: Disconnecting Connector On Mass Airflow (MAF) Sensor
GWWA10-10847Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connector -1- from the Mass Airflow Sensor -G70-.

-- Disconnect the vacuum line -3- from the air guide pipe.

CAUTION:

Risk Of Violating Emissions Legislation On USA Vehicles.

  • Do not open hose connection -2- !

-- Lay aside air guide pipe with connected crankcase ventilation hose -2- by loosening hose clamp -4- and opening clips -arrows-.

-- Disconnect the vacuum line -1-.

Fig 5: Identifying Secondary Air System Components
GWWA10-10625Courtesy of AUDI OF AMERICA, LLC

-- Remove the air filter housing and disconnect the electrical connector -2- on the rear side at the Intake Air Switch-Over Valve -N335-.

-- Remove hose -3- from the secondary air system.

-- Disconnect the coolant hose by lifting the retaining clamps -2- and loosening the hose clamp -1- on the coolant tube.

Fig 6: Identifying Coolant Hose From Radiator And Right Coolant Pipe, Removal
GWWA19-10521Courtesy of AUDI OF AMERICA, LLC

-- Remove the nuts -arrows- and move the vacuum pump -1- with the lines connected to the side.

Fig 7: Identifying Nuts -Arrows- & Move Vacuum Pump -1- With Lines Connected To Side
GWWA15-10487Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolts -1 and 2- and the coolant hose -arrow-.

Fig 8: Identifying Bolts And Coolant Hose, Removal
GWWA19-10570Courtesy of AUDI OF AMERICA, LLC

-- Remove the right coolant pipe from the coolant connections and lay it aside.

-- Remove the bolts -1 and 2- and loosen the hose clamp -arrow-.

Fig 9: Identifying Bolts And Coolant Connection, Removal
GWWA19-10571Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the coolant connection pieces leading to the right side.

-- Remove the vacuum hose -5- (if equipped) from the Secondary Air Injection (AIR) combination valve.

Fig 10: Identifying Right Secondary Air Injection (Air) Combination Valve
GWWA26-11141Courtesy of AUDI OF AMERICA, LLC

-- Remove the AIR hose -4- by pressing the release buttons.

-- Remove the bolts -1 and 2- and remove the secondary air injection combination valve.

NOTE:

Ignore item -3-.

-- Remove the bolts in the following sequence: -8 to 1-.

-- Carefully remove the right timing chain guard from the bond and the bracket -arrow- for the heated oxygen sensor connectors.

Fig 11: Right Timing Chain Cover Tightening Sequence
GWWA15-10486Courtesy of AUDI OF AMERICA, LLC