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How to Replace timing chain in cylinder head on VW Polo 9N 1.8 GTI

Special tools

  • Camshaft sprocket holding tool – Tool No.3036.
  • 1,8 engine: Chain tensioner/camshaft adjuster retaining tool – Tool No.3366.
  • 2,0 engine: Chain tensioner/camshaft adjuster retaining tool – Tool No.T10092.

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

How to Replace timing chain in cylinder head on VW Polo 9N 1.8 GTI
How to Replace timing chain in cylinder head on VW Polo 9N 1.8 GTI
  • Removal/refitting requires:
      • Remove timing belt.
  • Engine at TDC on No.1 cylinder [1] or [2] .
  • Ensure timing marks on camshaft rear sprockets aligned [3] .
  • Remove camshaft front sprocket. Use tool No.3036.
  • Fit chain tensioner/camshaft adjuster retaining tool. Tool No.3366 or T10092 [4] or [5] .

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

  • If reusing timing chain: Mark chain links with paint against timing marks on sprockets [6] & [7] .

    NOTE: Chain link on exhaust camshaft sprocket slighty offset from camshaft sprocket timing mark [6] .

  • Ensure camshaft timing marks separated by 16 link rollers, with link rollers 1 and 16 aligned with timing marks as shown [6] & [7] .
  • Remove and refit chain tensioner/camshaft adjuster complete with camshafts.
  • Tighten chain tensioner/camshaft adjuster bolts. Tightening torque: 10 Nm.

NOTE: Allow 30 minutes after installing camshafts before starting engine to prevent engine damage.

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