Audi Workshop Service and Repair Manuals

Removing and installing camshaft timing chain Special tools and workshop equipment required

t  Locking tool -T40098-

t  Counterhold tool -T10355-

t  Assembly tool -T10352- and assembly tool -T10352/1-

t  Locking pin -T40011- Removing –  Remove bumper cover (front) and bumper → Rep. gr.63. –  Perform service position → Rep. gr.50. –  Remove timing chain cover (top) → Chapter.

Caution The timing valve has a left-hand thread. –  Depending on version, turn assembly tool -T10352- or assembly tool -T10352/1- in direction of -arrow- to remove timing valve.

–  Remove bolts -arrows- and detach bearing saddle.

–  Turn vibration damper to „TDC“ position -arrow- using counterhold tool -T10355-. l  Notch on vibration damper must align with arrow marking on cover for timing chains (bottom). l  The markings -1- on the camshafts must face upwards. –  Remove timing chain cover (bottom) → Chapter.

–  Press oil pump chain tensioner in direction of -arrow- and lock in place using locking pin -T40011-. –  Remove oil pump chain tensioner -1-. –  Remove oil pump chain.

–  Insert scriber or suitable screwdriver in hole of chain tensioner in direction of -arrow 1- and lift locking element for chain tensioner. –  Press tensioning rail for timing chain in direction of -arrow 2- and lock in place using locking pin -T40011-. –  Detach camshaft timing chain from cylinder head.   Note Inlet camshaft will move in direction of engine rotation.

–  Remove tensioning rail for timing chain -2-. –  Remove guide rail for camshaft timing chain -1-. –  Remove timing chain. Installing l  Tightening torque → Chapter „Camshaft timing chain - exploded view“

Note t  The following procedure must be performed in continuous sequence. This requires the assistance of a 2nd person. t  The timing chain links with coloured markings must be positioned at the markings on the chain sprockets. t  Hold spanner in position until tensioning rail is installed. –  Fit timing chain onto exhaust camshaft. –  Fit timing chain onto crankshaft. –  Use spanner to turn inlet camshaft in direction of -arrow- and fit timing chain.

–  Fit tensioning rail for timing chain and tighten bolt -2-. –  Fit guide rail for camshaft timing chain and tighten bolts -1-.

–  Attach bearing saddle and screw in bolts -arrows- hand-tight. –  Remove locking pin -T40011-. –  Tighten bolts -arrows- for bearing saddle → Chapter. –  Install timing valve → Item. Further assembly is basically carried out in reverse order of dismantling. Note the following: –  Install timing chain cover (bottom) → Chapter. –  Install timing chain cover (top) → Chapter. –  Install poly V-belt tensioner → Chapter. –  Install poly V-belt → Chapter. –  Reset service position → Rep. gr.50. –  Install front bumper and bumper cover → Rep. gr.63.