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How to replace timing chains on Jaguar S-Type 2.5 24V 2001-2005

Special tools

  • Crankshaft pulley installer – Jaguar No.303-102/335/2.
  • Crankshaft pulley puller – Jaguar No.303-D121.
  • Crankshaft vibration damper holder/wrench strap – Jaguar No.303-D055.

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 chains on Jaguar S-Type 2.5 24V 2001-2005
How to replace timing chains on Jaguar S-Type 2.5 24V 2001-2005

Removal

  • Removal/installation of timing chain requires:
      • Engine removal.
      • Sump removal.

    NOTE: Refer to Autodata Technical Data for tightening torques.

    NOTE: Refer to Technical Data module for tightening torques.

  • Ensure crankshaft sprocket keyway at 7 o’clock position [1] .
  • Ensure timing mark on RH inlet camshaft sprocket at 1 o’clock [3] .
  • Ensure timing mark on RH exhaust camshaft sprocket at 8 o’clock [2] .
  • Remove:
      • RH chain tensioner [4] , RH tensioner rail, RH chain guide and RH chain.
  • Turn crankshaft clockwise until crankshaft keyway at 11 o’clock position [5] .
  • Ensure timing mark on LH inlet camshaft sprocket at 9 o’clock [6] .
  • Ensure timing mark on LH exhaust camshaft sprocket at 2 o’clock [7] .

NOTE: Coloured links may not be aligned.

  • Remove:
      • LH chain tensioner [8] , LH tensioner rail, LH chain guide and LH chain.

Installation

  • Remove bearing caps of each RH camshaft.
  • Rotate RH inlet camshaft until timing mark at 5 o’clock position [9] .
  • Rotate RH exhaust camshaft until timing mark at 12 o’clock position [10] .
  • Tighten bearing caps of each RH camshaft.
  • Ensure crankshaft sprocket keyway at 11 o’clock position [5] .
  • Fit crankshaft sprocket for LH chain.
  • Fit LH chain. Align coloured chain links with timing mark on each sprocket [6] , [7] & [11] .
  • Fit LH chain guides.
  • Release LH tensioner ratchet [12] .
  • Compress tensioner plunger [13] .
  • Retain in position with wire clip [14] .
  • Install tensioner assembly [8] .
  • Remove wire clip [14] .
  • Turn crankshaft clockwise 120° until crankshaft keyway at 3 o’clock position [15] .
  • Fit crankshaft sprocket for RH chain.
  • Fit RH chain. Align coloured chain links with timing mark on each sprocket [9] , [10] & [16] .
  • Fit RH chain guides.
  • Release RH tensioner ratchet [17] .
  • Compress tensioner plunger [18] .
  • Retain in position with wire clip [19] .
  • Install tensioner assembly [4] .
  • Remove wire clip [19] .
  • Ensure timing marks aligned [9] , [10] , [16] , [20] & [21] .
  • Crankshaft pulley bolt MUST only be used once.
  • Tighten crankshaft pulley bolt to 120 Nm. Slacken 360°. Tighten to 50 Nm + 90° [22] .
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