How to replace timing chain on Jaguar XJ6 4.2 32V V8 S/C 2003-2010

Special tools

• Camshafts setting/locking tool – Jaguar No.303-530.
• Timing chain tensioning tool – Jaguar No.303-532.
• Crankshaft positioning tool – Jaguar No.303-645.
• Primary chain wedges – Jaguar No.303-533.
• Crankshaft pulley locking tool – Jaguar No.303-191.
• Crankshaft pulley remover – Jaguar No.303-588.
• Crankshaft pulley locking tool adapter – Jaguar No.303-191-02.

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

• WARNING: Do not use crankshaft positioning tool to remove/install crankshaft pulley.

• Remove crankshaft position (CKP) sensor from torque converter housing.
• Turn the crankshaft to align slot for crankshaft positioning tool [1] .
• Ensure that flats on RH camshafts are positioned upwards, if not turn crankshaft 360°.
• Fit crankshaft positioning tool [1] .NOTE: Ensure that the positioning tool engages with the slot in the trigger-ring.
• If fitted: Remove camshaft position actuators and carriers from cylinder heads [2] & [3] .
• Fit RH camshafts setting/locking tool [4] .
• Remove RH timing chain tensioner, rail and guide [5] , [6] & [7] .
• Remove RH timing chain.
• Remove RH camshaft coupling chain tensioner [8] .
• Slacken RH exhaust camshaft sprocket bolt [9] .
• Slacken RH intake camshaft sprocket bolt [10] .
• Remove RH camshaft coupling chain and sprockets.
• Remove RH camshafts setting/locking tool [4] .
• Fit LH camshafts setting/locking tool [4] .
• Remove LH timing chain tensioner, rail and guide [11] , [12] & [13] .
• Remove LH timing chain.
• Remove LH camshaft coupling chain tensioner [8] .
• Slacken LH exhaust camshaft sprocket bolt [14] .
• Slacken LH intake camshaft sprocket bolt [15] .
• Remove LH camshaft coupling chain and sprockets.

Installation

• WARNING: Ensure that crankshaft sprockets are installed correctly .

• Ensure crankshaft positioning tool is installed [1] .
• Ensure LH camshafts setting/locking tool is installed [4] .
• Fit LH camshaft coupling chain tensioner [8] .
• Fit LH camshaft coupling chain and sprockets. Do not tighten bolts.
• Fit LH timing chain, tensioner rail and guide [12] & [13] .
• Reset chain tensioners:
  • Release tensioner ratchet [17] .
  • Compress tensioner plunger [18] .
  • Retain in position with wire clip [19] .
• Install tensioner [11] .
• Remove wire clip [19] .
• Hold timing chain tensioning tool. Tension LH exhaust camshaft sprocket anti-clockwise [20] .
• Tighten LH exhaust camshaft sprocket bolt [14] :
  • XKR/XK8: (A) – 70 Nm + 90°.
  • S-Type/XJR/XJ8: (B) – 120 Nm.
• Tighten LH intake camshaft sprocket bolt [15] :
  • XKR/XK8: (A) – 70 Nm + 90°.
  • S-Type/XJR/XJ8: (B) – 120 Nm.
• Ensure RH camshafts setting/locking tool is installed [4] .
• Fit RH camshaft coupling chain tensioner [8] .
• Fit RH camshaft coupling chain and sprockets. Do not tighten bolts.
• Fit RH timing chain, tensioner rail and guide [6] & [7] .
• Install tensioner [5] .
• Remove wire clip [19] .
• Hold timing chain tensioning tool. Tension RH exhaust camshaft sprocket anti-clockwise [20] .
• Tighten RH exhaust camshaft sprocket bolt [9] :
  • XKR/XK8: (A) – 70 Nm + 90°.
  • S-Type/XJR/XJ8: (B) – 120 Nm.
• Tighten RH intake camshaft sprocket bolt [10] :
  • XKR/XK8: (A) – 70 Nm + 90°.
  • S-Type/XJR/XJ8: (B) – 120 Nm.
• Remove LH and RH camshafts setting/locking tools [4] .
• If fitted: Fit camshaft position actuators [2] and carriers [3] to cylinder heads.
• Fit crankshaft pulley. Use new bolt.