Skip to content

How to Replace timing chains on Land Rover Discovery IV 4.0 V6 AWD 2009-

Special tools

  • Camshaft sprocket locking tool – adapter – No.303-576.
  • Camshaft sprocket alignment tool – No.303-597-01.
  • Camshaft alignment tool – No.303-1146.
  • Camshaft chain tensioning tool – No.303-571.
  • Crankshaft locking tool – No.303-674.
  • Crankshaft pulley locking tool – No.303-573.
  • Crankshaft pulley installer – No.303-102.
  • Crankshaft pulley removal tool – No.303-1049.
  • Intermediate shaft rear sprocket holding tool – No.303-634.

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 Land Rover Discovery IV 4.0 V6 AWD 2009-

Removal

  • Removal/installation of timing chain(s) requires:
      • Gearbox removal.
      • Cylinder head removal.

NOTE: Camshaft timing can be checked and adjusted in situ.

  • Engine at TDC No.1 cylinder.

NOTE: RH camshaft is driven by secondary timing chain at rear of engine [1] .

  • Remove RH secondary timing chain tensioner [2] .
  • Remove RH secondary timing chain cassette bolt [3] .
  • Remove RH camshaft sprocket bolt [4] .

NOTE: RH camshaft sprocket bolt has LH thread.

  • Secure secondary timing chain to camshaft sprocket [5] .
  • Remove LH secondary timing chain cassette bolt [6] .
  • Remove LH secondary timing chain tensioner [7] .
  • Remove LH camshaft sprocket bolt [8] .
  • Secure secondary timing chain to camshaft sprocket [5] .
  • Remove cylinder heads.
  • Remove timing cover.
  • Remove primary timing chain tensioner [9] .
  • Remove primary timing chain guide [10] .
  • Remove access plug from rear of cylinder block.
  • Install intermediate shaft rear sprocket holding tool [11] . Tool No.303-634.
  • Remove bolt, intermediate shaft front sprocket and primary chain [12] .
  • Remove intermediate shaft rear sprocket bolt [13] .
  • Remove bolt and LH secondary timing chain cassette [14] .
  • Remove bolt and RH secondary timing chain cassette [15] .
  • Lock balancer shaft chain tensioner with pin before removal [16] .

WARNING: DO NOT remove balancer shaft sprocket bolt.

  • Remove balancer shaft chain and crankshaft sprocket.

Installation

  • Engine at TDC No.1 cylinder.
  • There are two types of balancer shaft.
  • Type A:
      • Align timing marks on balancer shaft sprocket and balancer shaft [17] .
      • Retain in position with 4 mm pin [18] .

NOTE: Up to 7 complete turns of balancer shaft may be required to find correct position.

  • Type B:
      • Align timing mark on balancer shaft sprocket as shown [19] .
      • Retain in position with 4 mm pin [20] .

NOTE: Up to 7 complete turns of balancer shaft may be required to find correct position.

  • Install balancer shaft chain and crankshaft sprocket.
  • Remove 4 mm pin [18] or [20] .
  • Remove locking pin [16] .
  • Install RH secondary timing chain cassette and bolt [15] .
  • Install LH secondary timing chain cassette and bolt [14] .
  • Install intermediate shaft rear sprocket bolt [13] . Do not tighten.
  • Install intermediate shaft front sprocket, primary chain and bolt [12] . Do not tighten.
  • Install primary timing chain guide [10] .
  • Install primary timing chain tensioner [9] .
  • Hold intermediate shaft front sprocket bolt and tighten intermediate shaft rear sprocket bolt [12] & [13] . Tightening torque: 40 Nm.
  • Install intermediate shaft rear sprocket holding tool [11] .
  • Tighten intermediate shaft rear sprocket bolt a further 45° [13] .
  • Tighten intermediate shaft front sprocket bolt [12] . Tightening torque: 45 Nm + 70°.
  • Install timing cover.
  • Install crankshaft vibration damper. Fit new crankshaft pulley bolt.
  • Install cylinder heads.
  • Install camshaft sprocket bolts [4] & [8] . Do not tighten. Ensure camshaft sprockets turn freely but do not tilt.
  • Install RH and LH secondary timing chain cassette bolts [3] & [6] .
  • Turn the crankshaft 360° to No.1 cylinder at TDC.
  • Install crankshaft locking tool [21] .
  • Install camshaft alignment tool to front of RH camshaft [22] .
  • Install camshaft sprocket locking tool and adapter to rear of RH camshaft [23] .

NOTE: Camshaft groove at lower position.

  • Tighten RH camshaft sprocket bolt [4] . Tightening torque: 20 Nm + 100°.
  • Install RH secondary timing chain tensioner [2] .
  • Remove camshaft alignment tool and camshaft sprocket locking tool from RH cylinder head.
  • Install camshaft alignment tool to rear of LH camshaft [22] .
  • Install camshaft sprocket locking tool and adapter to front of LH camshaft [23] .

NOTE: Camshaft groove at lower position.

  • Tighten LH camshaft sprocket bolt [8] . Tightening torque: 20 Nm + 100°.
  • Install LH secondary timing chain tensioner [7] .
  • Remove camshaft alignment tool and camshaft sprocket locking tool from LH cylinder head.
  • Remove crankshaft locking tool [21] .

Related Cars

1 vote

Be First to Comment

Leave a Reply

Your email address will not be published. Required fields are marked *