How to Replace timing chain on Audi A3 8P MK2 2.0 FSI 2005-2008

Special tools

• Camshaft alignment tool – No.T10252.
• Camshaft adjuster socket – No.40080.
• Chain tensioner retaining tool – No.T10092.
• Chain tensioner locking pin – No.T10115.
• Two-pin wrench – No.T10020.

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

• Engine at TDC on No.1 cylinder [1] .
• Ensure timing mark on timing belt camshaft sprocket aligned with mark on timing belt rear cover [2] .
• Ensure indents on camshafts positioned as shown [3] .
• Install camshaft alignment tool [4] .
• Slacken exhaust camshaft adjuster bolt.

NOTE: There are two types of tensioner.

• Tensioner – type A:
  • • Compress timing chain tensioner and lock with retaining tool and M5 nut [5] .
  • • Remove timing chain tensioner bolt [6] .

NOTE: DO NOT overtighten chain tensioner retaining tool as damage may occur.

• Tensioner – type B:
  • • Compress timing chain tensioner and lock with locking pin [7] .
• Remove exhaust camshaft adjuster and chain.
• Ensure engine at TDC on No.1 cylinder [1] .
• Ensure camshaft alignment tool correctly located [4] .
• Fit camshaft adjuster and chain. Use new bolt.
• Ensure exhaust camshaft adjuster locating pin aligned with notch on camshaft [8] & [9] .
• If not, repeat installation procedures.
• Tighten bolt of exhaust camshaft adjuster. Tightening torque: 20 Nm + 45°.
• Release tensioner after timing chain installation:
• Tensioner – type A:
  • • Install timing chain tensioner bolt [6] . Tightening torque: 10 Nm.
  • • Remove chain tensioner retaining tool and M5 nut [5] .
• Tensioner – type B:
  • • Remove locking pin [7] .