How to Replace timing chain on Audi A3 8P MK2 1.4 TFSI 2007-2012

A3 Audi

Special tools

  • Camshaft alignment tool – No.T10171A.
  • Camshaft sprocket holding tool – No.T10172.
  • Crankshaft pulley holding tool 1 – No.3415.
  • Crankshaft pulley holding tool 2 – No.3415/1.
  • Crankshaft timing pin – No.T10340.
  • Dial gauge – No.VAS 6079.
  • Dial gauge holder – No.T10170.
  • Tensioner locking tool – No.T40011.

General 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

  • Removal/installation of timing chain requires:
      • Timing chain cover removal.
      • Sump removal.
  • Install dial gauge and holder in No.1 cylinder plug hole. Ensure engine at TDC on No.1 cylinder [1] .
  • Ensure timing marks on camshafts aligned as shown [2] . If not, turn crankshaft 360°.
  • Fit camshaft alignment tool [3] .

NOTE: If camshaft alignment tool cannot be inserted valve timing is incorrect.

  • Install crankshaft timing pin [4] .
  • Refit crankshaft pulley bolt with spacer. Finger tighten bolt.
  • Push tensioner rail against chain tensioner.
  • Fit tensioner locking tool [5] .

NOTE: If reusing timing chain: Mark direction of rotation on chains.

  • Remove camshaft alignment tool [3] .
  • Slacken bolt of each camshaft sprocket.

NOTE: Inlet camshaft sprocket bolt has LH thread.

  • Remove exhaust camshaft sprocket [6] and timing chain.
  • Align camshafts. Use special tool [3] .
  • Ensure crankshaft at TDC on No.1 cylinder:
      • Turn crankshaft slowly clockwise until it stops against timing pin [4] .
  • Install exhaust camshaft sprocket [6] with timing chain.
  • Renew bolt of each camshaft sprocket and re-tighten by hand.
  • Ensure camshaft sprockets turn freely but do not tilt.
  • Remove tensioner locking tool [5] .
  • Ensure crankshaft at TDC on No.1 cylinder:
      • Turn crankshaft slowly clockwise until it stops against timing pin.
  • Ensure camshaft alignment tool correctly located [3] .
  • Temporarily tighten camshaft sprocket bolts to:
      • Inlet camshaft sprocket bolt. Tightening torque: 40 Nm.
      • Exhaust camshaft sprocket bolt. Tightening torque: 50 Nm.
  • Remove camshaft alignment tool [3] .
  • Remove crankshaft timing pin [4] .
  • Turn crankshaft two turns clockwise.
  • Check engine at TDC on No.1 cylinder. Use dial gauge [1] .
  • Fit crankshaft timing pin [4] .
  • Ensure camshaft alignment tool can be fitted [3] .
  • If camshaft alignment tool cannot be fitted valve timing is incorrect. Repeat installation procedures.
  • Remove camshaft alignment tool [3] .
  • Remove crankshaft timing pin [4] .
  • Tighten camshaft sprocket bolts a further 90°.
  • Turn crankshaft two turns clockwise.
  • Check valve timing.
  • Tighten crankshaft pulley bolt. Tightening torque: 150 Nm + 180°.

NOTE: Crankshaft pulley bolt and bolt on each camshaft sprocket MUST only be used once.

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