How to Replace timing chain on Audi R8 4.2 2009

Audi R8 4.2 2009 timing chain change instructions and replacement inteval. Full guide!

Special tools

• Camshaft adjuster holding tool – No.T40079.
• Camshaft locking tool x 2 – No.T40070.
• Crankshaft locking pin – No.3242.
• Crankshaft alignment tool – No.T40146.
• Timing chain tensioner locking pin – No.T40071.
• Torque wrench – No.VAG 1332.
• Torque wrench adapter – No.VAG 1332/9.

Special precautions

• Disconnect battery earth lead.
• Remove spark plugs to ease turning engine.
• Turn engine in normal direction of rotation (unless otherwise stated).
• Observe tightening torques.
• If fitted: Mark position of crankshaft position (CKP) sensor before removal.
• Do NOT turn crankshaft via camshaft or other sprockets.
• Do NOT turn crankshaft or camshaft with timing chain removed.

Valve timing procedures

• Timing chains located at rear of engine.
  • Removal/installation of timing chain(s) requires:
  • Removal of engine and transmission.
• Flywheel removal.

NOTE: All bolts with an angular torque setting MUST be replaced.

• Engine at TDC No.1 cylinder [1] .
• Ensure camshafts correctly aligned [2] . Threaded holes in camshafts point upwards.
• Fit camshaft locking tools [3] . Tighten to 25 Nm.
• If camshaft locking tool cannot be fitted valve timing is incorrect.
• Remove blanking plug from upper sump.
• Fit crankshaft locking pin [4] . Tightening torque: 20 Nm.
• Remove tensioner(s) to ease timing chain(s) removal/installation.
• Push plunger into tensioner housing and insert locking pin [5] , [6] & [7] .
• Slacken central bolt of each LH cylinder head camshaft adjuster 1 turn [8] .

NOTE: Mark chain link and camshaft adjusters with paint before removal.

• Align camshafts.
• Fit camshaft locking tool to LH cylinder bank [3] .
• Fit camshaft locking tool bolts. Tighten to 25 Nm.
• Pre-tension chain using camshaft adjuster pre-tensioning tools [9] .
• Tighten bolt of each LH camshaft adjuster in two stages:
• Tighten LH inlet camshaft adjuster bolt to stage A: 60 Nm.
• Maintain pre-tension on LH inlet camshaft adjuster [9] .
• Tighten LH exhaust camshaft adjuster bolt to stage A: 60 Nm.
• Remove camshaft adjuster pre-tensioning tools [9] .
• Tighten bolt of each LH camshaft adjuster to stage B: 80 Nm + 90°.
• Repeat valve timing procedure for RH cylinder bank.
• Remove timing chain tensioner locking pins after repairs [7] .

NOTE: Central bolt of camshaft adjusters MUST only be used once.

• Remove crankshaft locking pin and camshaft locking tool [4] & [3] .
• Turn crankshaft 2 turns clockwise to TDC on No.1 cylinder [1] .
• Fit crankshaft locking pin [4] .
• Check valve timing.
• Remove crankshaft locking pin [4] .
• Refit blanking plug for upper sump.

NOTE: If timing chains are to be reused, mark LH and RH chains before removal to ensure they are refitted in their original positions.