How to Replace timing belt on Renault Megane 3 1.5 dCi 2008-

Replacement Interval Guide

• Renault recommend:
• Except 750/766/794/796:
• →2006:
• Replacement every 72,000 miles or 5 years (tensioner pulley must also be replaced).
• 2007→:
• 12,000 mile service intervals:
• Replacement every 96,000 miles or 6 years (tensioner pulley must also be replaced).
• 12,500 mile service intervals:
• Replacement every 100,000 miles or 6 years (tensioner pulley must also be replaced).
• 18,000 mile service intervals:
• Replacement every 90,000 miles or 6 years (tensioner pulley must also be replaced).
• 750/766:
• →2006: Replacement every 72,000 miles or 5 years (tensioner pulley must also be replaced).
• 2007-23/04/10: Replacement every 96,000 miles or 6 years (tensioner pulley must also be replaced).
• 24/04/10→: Replacement every 104,000 miles or 6 years (tensioner pulley must also be replaced).
• 794/796:
• →2008:
• Replacement every 72,000 miles or 5 years under normal conditions (tensioner pulley must also be replaced).
• Replacement every 54,000 miles or 5 years under adverse conditions (tensioner pulley must also be replaced).
• 2009→:
• Replacement every 96,000 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:
Clio	4,10
Logan	2,10
Mégane II	2,70
Mégane III	3,30
Fluence (830/832)	3,30
Fluence (834/836/837/838/842)	3,40
Laguna	2,80
Scénic/Grand Scénic II	2,60
Scénic/Grand Scénic III (830/832/834/836)	3,20
Scénic/Grand Scénic III (837/846)	3,00

Special Tools

• Crankshaft timing pin – Renault No.Mot.1489.
• Camshaft timing pin – Renault No.Mot.1430.
• Wiper arm extractor (Scénic/Grand Scénic) – Renault No.Mot.1552.

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

NOTE: If timing belt has failed, it is possible that the camshaft sprocket key has been damaged which would cause incorrect valve timing.

1. Raise and support front of vehicle.
2. Remove:
   • Engine top cover.
   • Clio/Scénic/Grand Scénic: Plenum chamber cover.
   • Scénic/Grand Scénic: Wiper arms. Use tool No.Mot.1552.
   • Clio/Scénic/Grand Scénic: Plenum chamber front panel.
   • Scénic/Grand Scénic: Air filter access panel.
   • Laguna: Air filter assembly.
   • Logan/Mégane/Laguna/Fluence/Scénic/Grand Scénic: Auxiliary drive belt.

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

3. Support engine.
4. Unclip fuel pipes from RH engine mounting intermediate bracket.
5. Remove:
   • Engine undershield.
   • Engine lower tie-bar.
6. Clio TL4 gearbox: Remove starter motor.NOTE: Mark position of RH engine mounting before removal.
7. Remove:
   • RH engine mounting.
   • RH front wheel.
   • RH wheel arch liner.
   • Clio: Fuel filter mounting.
8. Clio: Move aside fuel filter assembly. DO NOT disconnect fuel pipes.
9. Clio: Remove:
   • Fuel filter rear cover.
   • Auxiliary drive belt.NOTE: Auxiliary drive belt(s), tensioner pulley and guide pulley(s) MUST be replaced.
10. Lock flywheel with large screwdriver. Slacken crankshaft pulley bolt [1] .
11. Remove:
    • Crankshaft pulley bolt [1] .
    • Crankshaft pulley [2] .
    • 764/772: Timing belt upper cover [3] .
    • 722/724/728/729/766/768/770/774/780/782/794/796/832/834/836/837/842/846: Timing belt upper cover [4] .
    • 722/724/728/729/766/830/834/838/846: High-pressure fuel pump position sensor [5] .
    • 722/724/728/729/766/768/770/774/780/782/832/834/836/837/842/846: Timing belt lower cover [6] .
    • RH engine mounting bracket.
    • Blanking plug from cylinder block [7] .
12. Temporarily fit crankshaft pulley bolt with a spacer [1] .
13. Turn crankshaft clockwise until camshaft sprocket timing pin locating hole almost aligned with hole in cylinder head [8] .
14. Insert crankshaft timing pin [9] . Tool No.Mot.1489.
15. Turn crankshaft slightly until crankshaft web stops against timing pin [9] .
16. Insert camshaft timing pin [10] . Tool No.1430.
17. Remove timing pins [9] & [10] .
18. Slacken tensioner pulley bolt [11] . Move tensioner pulley away from belt.
19. Remove:
    • Timing belt.
    • Tensioner pulley bolt [11] .
    • Tensioner pulley.
    • Crankshaft pulley bolt [1] .

Installation

NOTE: Timing belt and tensioner pulley MUST be replaced.

1. Check condition of water pump, replace if necessary.
2. Fit new tensioner pulley. Ensure tensioner pulley retaining lug located correctly in cylinder head.
3. Fit new tensioner pulley bolt [11] . Finger tighten bolt.
4. Insert timing pins [9] & [10] .
5. Ensure crankshaft web against timing pin [9] .
6. Remove crankshaft sprocket. Degrease sprocket. Degrease end of crankshaft.WARNING: Failure to degrease components may lead to sprocket slipping on crankshaft, resulting in severe engine damage.
7. Ensure crankshaft sprocket keyway at 12 o’clock position [12] .
8. Refit crankshaft sprocket.
9. Temporarily fit crankshaft pulley bolt with a spacer [1] .
10. 732/764/768/770/772/774/794/796/832/836/837/846: Ensure high-pressure fuel pump sprocket timing mark aligned as shown [13] .
11. 722/724/728/729/750/752/766/830/834/838/842: Ensure high-pressure fuel pump sprocket timing mark aligned with bolt head [14] .
12. Remove one camshaft sprocket bolt [15] .NOTE: DO NOT slacken camshaft sprocket hub nut [16] .
13. Slacken two camshaft sprocket bolts one turn [17] .
14. Fit timing belt, starting at crankshaft sprocket. Ensure marks on belt aligned with marks on sprockets [18] , [19] & [20] . Ensure belt is taut on non-tensioned side.NOTE: There should be 19 troughs between camshaft sprocket and high-pressure fuel pump sprocket timing marks [20] & [19] and 51 troughs between high-pressure fuel pump sprocket and crankshaft sprocket timing marks [19] & [18] .
15. Turn tensioner pulley anti-clockwise until pointer at lower position [21] . Use 6 mm Allen key [22] . Tighten tensioner pulley bolt [11] . Tightening torque: 27 Nm.
16. Ensure camshaft sprocket bolts not at end of slotted holes [23] . If not: Repeat installation procedure.
17. Fit camshaft sprocket bolt [15] .
18. Tighten camshaft sprocket bolts [15] & [17] . Tightening torque: 14 Nm.
19. Remove timing pins [9] & [10] .
20. Turn crankshaft two turns clockwise until camshaft sprocket timing pin locating hole almost aligned with hole in cylinder head [8] .
21. Insert crankshaft timing pin [9] .
22. Turn crankshaft slightly until crankshaft web stops against timing pin [9] .
23. Insert camshaft timing pin [10] .
24. Slacken camshaft sprocket bolts one turn [15] & [17] .
25. If timing pin cannot be inserted:
    • Slacken camshaft sprocket bolts one turn [15] & [17] .
    • Turn camshaft sprocket hub nut [16] until timing pin [10] can be inserted.
    • DO NOT tighten bolts [15] & [17] .
26. Ensure crankshaft sprocket keyway at 12 o’clock position [12] .
27. 732/764/768/770/772/774/794/796/832/836/837/846: Ensure high-pressure fuel pump sprocket timing mark aligned as shown [13] .
28. 722/724/728/729/750/752/766/830/834/838/842: Ensure high-pressure fuel pump sprocket timing mark aligned with bolt head [14] .NOTE: There should be 19 troughs between camshaft sprocket and high-pressure fuel pump sprocket timing marks [20] & [19] and 51 troughs between high-pressure fuel pump sprocket and crankshaft sprocket timing marks [19] & [18] .

    NOTE: Tensioner pulley pointer can be in two positions.

29. Tensioner pulley pointer at position shown [24] :
    • Hold tensioner pulley. Use 6 mm Allen key [25] .
    • Slacken tensioner pulley bolt [11] .
    • Turn tensioner pulley anti-clockwise until pointer aligned with notch [24] & [26] . Use 6 mm Allen key [25] .
30. Tensioner pulley pointer at position shown [21] :
    • Hold tensioner pulley. Use 6 mm Allen key [22] .
    • Slacken tensioner pulley bolt [11] .
    • Turn tensioner pulley clockwise until pointer aligned with notch [21] & [27] . Use 6 mm Allen key [22] .
31. Tighten tensioner pulley bolt [11] . Tightening torque: 27 Nm.
32. Tighten camshaft sprocket bolts [15] & [17] . Tightening torque: 14 Nm.
33. Remove timing pins [9] & [10] .
34. Turn crankshaft two turns clockwise until camshaft sprocket timing pin locating hole almost aligned with hole in cylinder head [8] .
35. Insert crankshaft timing pin [9] .
36. Turn crankshaft slightly until crankshaft web stops against timing pin [9] .
37. Insert camshaft timing pin [10] .
38. If timing pin cannot be inserted: Repeat installation procedure.
39. Remove old crankshaft pulley bolt and spacer [1] .NOTE: DO NOT start engine without auxiliary drive belt fitted as damage may occur to crankshaft pulley.
40. Laguna: Fit new crankshaft pulley [2] .
41. Clio/Logan/Mégane/Scénic/Grand Scénic/Fluence: Fit crankshaft pulley [2] .
42. Fit new crankshaft pulley bolt [1] .
43. Lock flywheel with large screwdriver.
44. Tighten crankshaft pulley bolt [1] . Tightening torque:
    • M12: 60 Nm + 100±10°.
    • M14: 120 Nm + 95±15°.
45. Remove timing pins [9] & [10] .
46. Fit blanking plug [7] . Tightening torque: 20-25 Nm.
47. Install components in reverse order of removal.