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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 >> Cylinder Head >> Cylinder Head, Removing And Installing >> Left Cylinder Head, Removing >> Procedure

Left Cylinder Head, Removing: Procedure

-- Remove the left timing chain cover. Refer to LEFT TIMING CHAIN COVER, REMOVING AND INSTALLING .

-- Remove the left camshaft timing chain from the camshafts. Refer to CAMSHAFT TIMING CHAIN, REMOVING FROM CAMSHAFTS .

-- Remove the intake manifold. Refer to INTAKE MANIFOLD, REMOVING AND INSTALLING .

Fig 1: Identifying Intake Manifold Bolts Removal/Tightening Sequence
GWWA15-10257Courtesy of AUDI OF AMERICA, LLC

-- Remove the left cylinder head cover. Refer to LEFT CYLINDER HEAD COVER, REMOVING AND INSTALLING .

-- Disconnect the connectors:

Fig 2: Identifying Connectors
GWWA15-10482Courtesy of AUDI OF AMERICA, LLC
  1. On the Camshaft Adjustment Valve 2 -N208-
  2. From the Fuel Pressure Sensor -G247-
  3. On the left high pressure pump
  4. On the Camshaft Position Sensor 2 -G163-

-- Remove the bolt -5- and move the wiring harness to the side.

-- Remove the bolts -1 and 2- and remove the left chain tensioner.

Fig 3: Identifying Bolts For Left Chain Tensioner And Left Camshaft Timing Chain
GWWA13-10115Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connectors -arrows- on the fuel injectors.

Fig 4: Disconnecting Electrical Connectors At Fuel Injectors & Removing High Pressure Lines From Connector On Fuel Rail
GWWA15-10240Courtesy of AUDI OF AMERICA, LLC

-- Remove the high pressure line -2- from the connection on the fuel rail.

-- Remove the high pressure line -1- from connection on the fuel rail by counterholding at hex head with an open end wrench and loosening union nut.

NOTE:

Do Not Change The Bend Shape Of The High Pressure Lines.

-- Remove the sealing plug -arrow-.

Fig 5: Identifying Locking Bolt
GWWA15-10229Courtesy of AUDI OF AMERICA, LLC

-- Remove the bolts -arrows-.

Fig 6: Cylinder Head Bolts Loosening Sequence
GWWA15-10230Courtesy of AUDI OF AMERICA, LLC