How to replace timing chains on Jaguar S-Type 3.0 24V 1998-2008

Special tools

• Crankshaft vibration damper holder/wrench strap – Jaguar No.303-D055.
• Crankshaft vibration damper remover – Jaguar No.303-D121.
• Crankshaft vibration damper installer – Jaguar No.303-102.

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

• Removal/installation of timing chain(s) requires:
  • Front crossmember removal.
  • Sump removal.
• Engine at TDC on No.1 cylinder with marked links and timing marks aligned [1] , [2] , [3] , [4] & [5] .
• Remove RH tensioner [6] , RH tensioner blade and RH chain guide [7] & [8] and RH chain.
• Remove LH tensioner [9] , LH tensioner blade and LH chain guide [10] & [11] and LH chain.
• Remove crankshaft sprockets.

Installation

• Engine at TDC on No.1 cylinder.
• Ensure crankshaft sprocket keyway at 11 o’clock position [12] .
• Set timing chain tensioners:
  • Release tensioner ratchet [13] .
  • Compress tensioner plunger [14] .
  • Retain in position with wire clip [15] .
• Install crankshaft sprockets.
• Ensure timing marks of both LH camshaft sprockets aligned [16] .
• Install LH chain guide [11] .
• Install LH chain ensuring marked links aligned [1] , [4] & [5] .
• Install LH tensioner blade [10] .
• Install LH tensioner [9] .
  • Remove wire clip [15] .
• Ensure timing marks of both RH camshaft sprockets aligned [17] .
• Install RH chain guide [8] .
• Install RH chain ensuring marked links aligned [1] , [2] & [3] .
• Install RH tensioner blade [7] .
• Install RH tensioner [6] .
  • Remove wire clip [15] .
• Seal crankshaft pulley keyway with a proprietary sealant.
• Tighten crankshaft pulley bolt to 120 Nm slacken 360°. Tighten to 50 Nm + 90° [18] .