How to Replace timing belt on Renault Megane 3 1.9 dCi 2008-

Replacement Interval Guide

• Renault recommend replacement every 90,000 miles or 6 years (tensioner pulley must also be replaced).
• The previous use and service history of the vehicle must always be taken into account.

Check For Engine Damage

CAUTION: This engine has been identified as an INTERFERENCE engine in which the possibility of valve-to-piston damage in the event of a timing belt failure is MOST LIKELY to occur. A compression check of all cylinders should be performed before removing the cylinder head(s).

Repair Times – hrs

Remove & install:
Mégane III	3,50
Scénic/Grand Scénic III	3,80

Special Tools

• Crankshaft timing pin – Renault No.Mot.1054.

Special Precautions

• Disconnect battery earth lead.
• DO NOT turn crankshaft or camshaft when timing belt removed.
• Remove glow plugs to ease turning engine.
• Turn engine in normal direction of rotation (unless otherwise stated).
• DO NOT turn engine via camshaft or other sprockets.
• Observe all tightening torques.

Removal

1. Raise and support front of vehicle.
2. Remove:
   • Wiper arms.
   • Plenum chamber cover.
   • Plenum chamber front panel.
   • Engine top cover.
   • RH front wheel.
   • RH inner wing panel.
   • Engine undershield.
   • Auxiliary drive belt.

     NOTE: Auxiliary drive belt(s), tensioner pulley and guide pulley(s) MUST be replaced.

   • Flywheel cover.
3. Lock flywheel with large screwdriver. Slacken crankshaft pulley bolt [1] .
4. Remove:
   • Crankshaft pulley bolt [1] .
   • Crankshaft pulley [2] .
5. Support engine.
6. Remove:
   • Engine upper tie-bar.
   • Engine lower tie-bar.

   NOTE: Mark position of RH engine mounting before removal.

7. Slacken RH engine mounting to intermediate bracket bolt.
8. Remove:
   • RH engine mounting and intermediate bracket.
   • Blanking plug from cylinder block [3] .
   • Timing belt cover [4] .
9. Turn crankshaft clockwise until camshaft sprocket timing marks almost aligned [5] .
10. Insert crankshaft timing pin [6] . Tool No.Mot.1054.
11. Turn crankshaft slowly until timing pin can be inserted fully.
12. Ensure camshaft sprocket timing marks aligned [7] .
13. Ensure crankshaft sprocket timing mark located one tooth to left of centre [8] .
14. Remove high-pressure fuel pump support bracket.
15. Slacken tensioner pulley nut [9] . Move tensioner away from belt.
16. Remove timing belt.
17. Remove tensioner pulley.

Installation

NOTE: Timing belt and tensioner pulley MUST be replaced.

1. Fit new tensioner pulley. Finger tighten nut [9] .
2. Ensure crankshaft timing pin inserted [6] .
3. Ensure crankshaft keyway located centrally between lugs on engine front housing [10] .
4. Ensure crankshaft sprocket timing mark located one tooth to left of centre [8] .
5. Ensure camshaft sprocket timing marks aligned [7] .
6. Fit timing belt. Ensure marks on belt aligned with marks on sprockets [11] , [12] & [13] . Ensure belt is taut on non-tensioned side.

   NOTE: Ensure directional arrows point in direction of rotation.

7. Slacken tensioner pulley nut [9] .
8. Turn tensioner pulley anti-clockwise until movable pointer [14] aligned with notch [15] . Use suitable tool [16] .
9. Tighten tensioner pulley nut [9] . Tightening torque: 23 Nm.
10. Remove crankshaft timing pin [6] .
11. Turn crankshaft two turns clockwise until camshaft sprocket timing marks almost aligned [5] .
12. Insert crankshaft timing pin [6] .
13. Turn crankshaft slowly until timing pin can be inserted fully.
14. Ensure camshaft sprocket timing marks aligned [7] .
15. Ensure crankshaft keyway located centrally between lugs on engine front housing [10] .
16. Ensure tensioner pulley pointer [14] aligned with notch [15] .
17. If not:
    • Slacken tensioner pulley nut [9] by a maximum of one turn whilst holding tensioner pulley with suitable tool [16] .
    • Turn tensioner pulley clockwise until pointer aligned with notch [14] & [15] . Use suitable tool [16] .
    • Tighten tensioner pulley nut [9] . Tightening torque: 23 Nm.
18. Remove crankshaft timing pin [6] .
19. Refit blanking plug [3] . Tightening torque: 25 Nm.
20. Fit high-pressure fuel pump support bracket.
21. Fit timing belt cover [4] .
22. Lock flywheel with large screwdriver.
23. Fit:
    • New crankshaft pulley [2] .
    • New crankshaft pulley bolt [1] .
24. Tighten crankshaft pulley bolt [1] . Tightening torque: 40 Nm + 110±10°.

    NOTE: DO NOT start engine without auxiliary drive belt fitted as damage may occur to crankshaft pulley.

25. Install components in reverse order of removal.