How to replace Timing Belt and Sprockets on Acura Car models?

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The procedure is as follows :-----

Timing Belt and Sprockets

REMOVAL & INSTALLATION

Replace the timing and balancer shaft belts at no more that 105,000 miles (168,000km). Acura also specifies that under extreme conditions the timing and balancer shaft belts should be replaced more frequently, at 60,000 miles (100,000 km). These abnormal conditions include very high temperatures over 110°F (43°C) or very low ambient temperatures of minus 20°F (-29°C).

1.8L Engines

1. Remove the negative battery cable.
2. Remove the splash shield from the wheel well.

See Figure 1

Fig. Fig. 1: Exploded view of the timing belt and cover assembly-1.8L engine

3. Remove the power steering pump by loosening the adjusting bolts and removing the mounting bolts.
4. Loosen the adjusting and idler pulley bracket bolt on the (A/C) to free the belt.
5. Loosen the adjusting nut and then the mounting nuts to allow the alternator belt to be removed.
6. Remove the cruise control actuator if equipped.
7. Remove the side engine mount bolts and then mount.
8. Remove the valve cover.
9. Remove the crankshaft bolt.

Be careful when removing the crankshaft damper bolt. Excessive force may snap or strip the bolt.

10. The middle timing cover can be removed by unbolting the two fasteners.
11. Remove the lower timing belt cover.
12. The timing belt tensioner adjusting bolt must now be loosened no more than180°.

See Figure 2

Fig. Fig. 2: View of the timing belt tensioner

13. The tension on the belt can be released by pushing against it.
14. After the tension is released retighten the adjusting bolt.
15. Remove the timing belt from the pulleys.

If oil leakage is detected around the camshaft or crankshaft seals, replace them.

16. Remove the camshaft pulley(s) by removing the bolt(s) from the pulley(s).
17. The camshaft pulleys do not need to be match marked to the location of the camshafts. They are machined to only go on in one direction via the use of a woodruff key. It is a good idea to mark the pulleys left and right respectively.

To install:

18. Install the camshaft pulleys.

Clean the covers before installation. The smallest piece of dirt may cause premature belt failure.

19. Set the crankshaft and camshaft pulleys as in the illustration before installing the timing belt.
20. Set the crankshaft so that the No. 1 position is at top dead center (TDC). Position the groove on the teeth side of the belt to the pointer of the oil pump.
21. Install the timing belt, its components, and covers.
22. Align the TDC marks located on the intake and exhaust pulleys.

See Figure 3

Fig. Fig. 3: Position the camshaft sprockets with the arrows in the "UP" position-1.8L engine

23. Install the belt in the following sequence:
    1. Timing belt drive pulley.
    2. Adjusting pulley.
    3. Water pump pulley.
    4. Exhaust camshaft pulley.
    5. Intake camshaft pulley.

WARNING

Turning the crankshaft in the clockwise direction may cause the timing belt to not seat properly causing component damage.

24. Turn the crankshaft about four to six turns counterclockwise to ensure that the belt properly seats on the pulleys.
25. Set the number one piston at top dead center (TDC).
26. Loosen the adjusting bolt (180°only)
27. Rotate the crankshaft counterclockwise 3 teeth on the camshaft pulley, then tighten he adjusting bolt to 40 ft. lbs. (54 Nm).

See Figure 4

Fig. Fig. 4: Direction of rotation of the crankshaft pulley-1.8L engine

28. Check that the crankshaft and camshaft pulleys are at TDC.

If the camshaft pulley is not positioned at TDC, remove the timing belt and repeat the above procedures.

29. Install the valve cover.
30. Install the engine mount(s).
31. If equipped, install the cruise control actuator.

Lubricate the crankshaft pulley bolt with engine oil.

See Figure 5

Fig. Fig. 5: Lubricate the crankshaft pulley bolt with engine oil-1.8L engine

32. Install the crankshaft damper and damper mounting bolt. Tighten the mounting bolt to 130 ft. lbs. (177 Nm).
33. Install the alternator, A/C, and power steering accessories.
34. Install the splash shield into the wheel well.
35. Connect the negative battery cable.

2.2L, 2.3L engines

1. Remove the negative battery cable.
2. Remove the splash shield from the wheel well.
3. Remove the power steering pump by loosening the adjusting bolts and removing the mounting bolts.

See Figure 6

Fig. Fig. 6: Power steering adjusting and mounting bolt locations

4. Loosen the adjusting nut and then the mounting nuts to allow the alternator belt to be removed.

See Figure 7

Fig. Fig. 7: Alternator mounting bolt location

5. Remove the alternator terminal and connector by pulling up on the lock.

See Figure 8

Fig. Fig. 8: Exploded view of alternator wiring harness lock

6. If equipped, remove the cruise control actuator.

Use a jack to support the engine before removing the engine mount. Use a block of wood to cushion the oil pan from being damaged.

7. Remove the side engine mount bolts and then mount.
8. Remove the dipstick from the tube and then remove the tube.
9. Remove the valve cover.
10. Remove the crankshaft pulley bolt and then the pulley.

Be careful when removing the crankshaft damper bolt. Excessive force may snap or strip the bolt.

11. Remove the adjusting nuts rubber seal.
12. Remove the timing belt and balancer shaft covers.

To prevent damage to the cover do not use them to store removed items such as fasteners or brackets.

13. The timing belt tensioner adjusting bolt must now be loosened no more than180°.
14. The tension on the belt can be released by pushing against it.
15. After the tension is released, retighten the adjusting bolt.

If you are removing only the balancer belt, you can lock the timing belt adjuster arm by threading a 6 x 1.0 mm bolt in to hold the tension. Next loosen the adjusting nut about one turn. Push the tensioner to remove the any tension from the balancer belt. After the tension has been removed, tighten the adjusting bolt.

See Figures 9 and 10

Fig. Fig. 9: Installing the 6.0 x 1.0mm bolt

Fig. Fig. 10: View of the timing belt tensioner assembly

16. Remove the balancer and timing belts from the pulleys.

If oil leakage is detected around the camshaft or crankshaft seals, replace them.

17. Remove the camshaft pulley(s) by removing the bolt(s) from the pulley(s).
18. The camshaft pulleys do not need to be match marked to the location of the camshafts. They are machined to only go on in one direction via the use of a woodruff key. It is a good idea to mark the pulleys left and right respectively.

To install:

19. Installation of the timing belt is the reverse of the removal procedure.

Follow the below steps to ensure that the timing and balancer belts are installed with the engine properly timed.

20. Remove the balancer drive pulley.
21. Position No. 1 piston at top dead center.
22. Position the dimple on the tooth of the timing belt drive pulley to the pointer on the oil pump.

See Figure 11

Fig. Fig. 11: Aligning the timing belt drive pulley to the oil pump

23. Position the camshaft pulley with the stamping facing up.

See Figure 12

Fig. Fig. 12: Positioning the camshaft sprocket.

24. Install the timing belt by routing it as follows:
    1. Crankshaft pulley
    2. Adjusting pulley
    3. Water pump pulley
    4. Camshaft pulley.

See Figure 13

Fig. Fig. 13: Proper timing belt installation.

25. Loosen the adjusting nut to tension the timing belt, then retighten the nut.
26. Install the lower timing belt cover and the balancer belt drive pulley.
27. Install and tighten the crankshaft pulley and bolt.
28. Turn the crankshaft six turns to seat it on the pulley.
29. Adjust the timing belt tension.
30. Make sure that the crankshaft pulley and the camshaft pulleys are both positioned at top dead center.

If the camshaft or crankshaft is not positioned at top dead center (TDC), you must remove the timing belt and readjust the position.

31. Remove the lower timing cover by removing the crankshaft pulley.
32. Set the number one piston at top dead center.
33. Install one of the 6.0 x 1.0mm bolts to lock the timing belt adjuster.
34. To verify that the balancer belt moves freely, loosen the adjusting nut ² / ₃turn.
35. To remove tension from the belt, push on the adjuster mechanism.

To align the rear balancer shaft, use a 6.0x1.0mm bolt, scribe a line 74mm (2.9 in) from the end of the bolt. Insert this bolt into the maintenance hole of the to the scribed line.

See Figures 14 and 15

Fig. Fig. 14: Insert this bolt into the maintenance hole of the to the scribed line.

Fig. Fig. 15: Align the pointer and the groove.

36. Align the front balancer groove and the pointer which is located on the oil pump housing.
37. Install the balancer belt.
38. Tension the balancer belt.
39. Remove the 6.0x1.0mm bolt, then install the sealing bolt.
40. Install the crankshaft pulley and then torque the pulley bolt to the correct specification.
41. Spin the crankshaft pulley approximately one turn then tighten the adjusting nut.
42. Remove the 6.0x1.0 mm bolt from the timing belt adjuster arm.
43. To install the lower timing cover you must remove the timing cover.
44. Do not loosen the adjusting nut while installing the rubber seal.
45. Install the crankshaft pulley then tighten the bolt to proper torque specs.
46. Install all other components.
47. Connect the negative battery cable.
48. Enter the anti-theft code for the radio, if applicable.

2.5L Engines See Figure 16

Fig. Fig. 16: Exploded view of timing belt and cover assembly

Position the No. 1 piston at top dead center.

1. Remove the power steering pump by loosening the adjusting nut and removing the mounting bolts.
2. Remove the air conditioning compressor by loosening the adjusting nut and removing the mounting bolts.
3. Remove the alternator belt by loosening the adjusting nut and mounting bolt.

See Figure 17

Fig. Fig. 17: Adjusting and mounting bolt location

4. Remove the 6 x 1.0 mm bolt from the dipstick filler tube.
5. Remove the dipstick and tube.

See Figure 18

Fig. Fig. 18: Remove the engine oil dipstick tube

6. Remove the valve cover.
7. Remove the crankshaft pulley.
8. Remove the upper and lower timing belt covers.

See Figure 19

Fig. Fig. 19: Remove the upper and lower timing belt covers

9. Relieve the tension from the timing belt by loosening the adjusting bolt no more than 180°.
10. Remove the timing belt from the pulleys.

See Figure 20

Fig. Fig. 20: Loosen the adjusting bolt 180 degrees

To install:

11. Installation is the reverse of removal. The key steps of the installation procedure are listed below.
12. Position the No. 1 piston at top dead center. This can be achieved by aligning the Top Dead Center (TDC) mark on the timing belt drive pulley with the mark on the oil pump.

See Figure 21

Fig. Fig. 21: Aligning the timing marks

13. Position the camshaft pulley so that the TDC mark on the pulley lines up with the pointer on the back cover.

See Figure 22

Fig. Fig. 22: Align the mark on the camshaft with the mark on the back cover

14. Install the timing belt on the crankshaft drive pulley.
15. Next position the belt around the adjusting pulley.
16. Position the belt around the water pump pulley.
17. Apply light tension to the timing belt as you loop it over the camshaft pulley.

See Figure 23

Fig. Fig. 23: Proper timing belt routing

18. To tension the timing belt, loosen the adjusting nut.
19. Once the adjuster spring has applied tension to the timing belt, retighten the adjusting nut.
20. Install the lower and upper timing belt covers.

See Figure 24

Fig. Fig. 24: Installing the timing belt covers

21. After installing the crankshaft pulley, tighten the bolt to the proper specifications.
22. To check that the timing belt has positioned itself on the pulley by rotating the crankshaft pulley about five to six turns.
23. Adjust the timing belt tension and check that the crankshaft and camshaft pulleys are at Top Dead Center (TDC).

See Figure 90946g26

Fig. Fig. 25: Lining up the camshaft and crankshaft pulley marks

24. Install the remaining components in the reverse of the removal procedure.
25. Connect the negative battery cable.

3.0L Engines See Figure 26

Fig. Fig. 26: Exploded view of the timing belt cover and assembly

1. Remove the splash shield from the wheel well.
2. Release the tension from the automatic tensioner and then remove the alternator belt.
3. Remove the power steering pump.
4. Remove the dipstick tube and the sealing O-ring.
5. Support the engine using a jack. Place a block of wood between the jack and the oil pan to prevent damage to the pan.
6. Remove the side engine motor mount.
7. Remove the crankshaft pulley from the crankshaft.
8. Remove the upper and lower timing covers.
9. Remove the battery hold-down clamp.
10. Grind the end of the threaded rod to aid reinstallation, as shown in the accompanying figure.

See Figure 27

Fig. Fig. 27: Grind the battery hold-down clamp as shown

11. Hold the timing belt adjuster in its current position by threading the battery clamp bolt into the guide just below the camshaft sprocket.

See Figure 28

Fig. Fig. 28: Set the crankshaft pulley so the No. 1 piston is at TDC

15. Set the camshafts to the TDC mark on the valve cover.

See Figure 29

Fig. Fig. 29: Set the camshafts to the TDC mark on the valve cover

16. Remove the battery clamp, that is holding the auto tensioner, from the back cover.
17. Remove the auto tensioner.
18. Remove the maintenance bolt from the tensioner.

If the oil drains out of the tensioner, refill it with no more than 0.22 fl. oz. (6.5ml).

19. Clamp the auto tensioner in a vise.

WARNING

Do not clamp the tensioner by the body.

20. Use a flat head screw driver to turn the tensioner, then slip the special stopper tool or equivalent over the assembly to hold it in place.

See Figure 30

Fig. Fig. 30: Turning the tensioner with a flat-head screw driver

21. Install the maintenance bolt.
22. Install the auto tensioner.
23. Install the timing belt in the following order:
    1. Loop the belt over the timing belt drive pulley.
    2. Install the timing belt around the adjusting pulley.
    3. Place it around the left camshaft pulley.
    4. Install it under the bottom of the water pump pulley.
    5. Route the belt around the right camshaft pulley.
    6. Place the last part of the belt around the back side of the idler pulley.

See Figure 31

Fig. Fig. 31: Proper timing belt routing

24. Tighten the idler pulley bolt.
25. Remove the stopper tool.
26. Install the timing covers.
27. Install the crankshaft pulley.
28. To position the pulleys, turn the crankshaft pulley about five to six turns.
29. The crankshaft and camshaft pulleys should be at TDC.

See Figure 32

Fig. Fig. 32: Inspection of the front and rear camshaft pulleys

30. If the camshafts are not at TDC, remove the timing belt and adjust the pulleys by repeating the above procedure.
31. Install all other components.
32. Connect the negative battery cable.

3.2L Engines

1. Disconnect the negative battery cable.
2. Support the engine using a jack. Place a block of wood between the jack and the oil pan to prevent damage to the pan.

See Figure 33

Fig. Fig. 33: Exploded view of the timing belt and related components

3. Remove the center engine support bracket.

See Figure 34

Fig. Fig. 34: Removal of the engine center support bracket

4. Loosen the adjusting nut and then the mounting nuts to allow the alternator belt to be removed.
5. Loosen the adjusting and idler pulley bracket bolt on the (A/C) to free the belt.
6. Remove the power steering pump by loosening the adjusting bolts and removing the mounting bolts.
7. Remove the TCS upper and lower bracket assemblies.

See Figure 35

Fig. Fig. 35: Removing the TCS upper and lower bracket.

8. Remove the TCS control valve assembly.
9. Remove the wiring harness and the oil pressure switch connector from the oil pressure switch.
10. Remove the idler pulley dipstick which is located by the idler pulley,
11. Remove the crankshaft pulley.
12. Remove the upper and lower timing belt covers.
13. Relieve the tension from the timing belt by loosening the adjusting bolt no more than 180°.

See Figure 36

Fig. Fig. 36: Loosen the adjuster bolt 180 degrees

14. Remove the engine timing belt.

To install:

See Figures 37, 38 and 39

Fig. Fig. 37: Aligning the timing marks

Fig. Fig. 38: Positioning the left camshaft

Fig. Fig. 39: Positioning the right camshaft

15. Install the timing belt in the reverse order of removal. The key steps are listed below.
16. Set the crankshaft drive belt pulley to where the No. 1 piston is at Top Dead Center (TDC).
17. Align the camshafts to the TDC mark on the valve cover.
18. Install the timing belt in the following order:
    1. Loop the belt over the timing belt drive pulley.
    2. Install the timing belt around the adjusting pulley.
    3. Place it around the left camshaft pulley.
    4. Install it under the bottom of the water pump pulley.
    5. Route the belt around the right camshaft pulley.
    6. Place the last part of the belt around the back side of the idler pulley.

See Figures 40 and 41

Fig. Fig. 40: Proper timing belt routing is essential

Fig. Fig. 41: Check to be sure the crank and cam pulleys are at TDC

19. To tension the timing belt, loosen the adjusting nut.
20. Once the adjuster spring has applied tension to the timing belt, retighten the adjusting nut.
21. Install the lower and upper timing belt covers.
22. After installing the crankshaft pulley, tighten the bolt to the proper specs.
23. To check that the timing belt has positioned itself on the pulley by rotating the crankshaft pulley about five to six turns.
24. Adjust the timing belt tension and check that the crankshaft and camshaft pulleys are at top dead center (TDC).
25. If the camshafts are not at TDC, remove the timing belt and adjust the pulleys by repeating the above procedure.
26. Install the remaining components in the reverse of the removal procedure.
27. Connect the negative battery cable.

3.5L Engines See Figure 42

Fig. Fig. 42: Exploded view of the timing and balancer belts and components

1. Turn the engine so that the No. 1 piston is at the top dead center (TDC).
2. Disconnect the negative battery cable.
3. Remove the engine cover.
4. Remove the air cleaner assembly and the intake tubing.
5. Loosen the adjusting nut and then the mounting nuts to allow the alternator belt to be removed.
6. Loosen the adjusting and idler pulley bracket bolt on the (A/C) to free the belt.
7. Remove the power steering pump by loosening the adjusting bolts and removing the mounting bolts.
8. Remove the TCS upper and lower bracket assemblies.
9. Remove the TCS control valve assembly.

See Figures 43, 44 and 45

Fig. Fig. 43: TCS upper and lower bracket assemblies

Fig. Fig. 44: Disconnecting the TCS control valve assembly

10. Disconnect the Vehicle Speed Sensor (VSS).

Fig. Fig. 45: Removing the Vehicle Speed Sensor (VSS)

11. Remove all vacuum hoses.
12. Remove the breather hose from the engine.
13. Remove the ignition control module (ICM) bracket assembly.
14. Remove the idler pulley bracket as well as the dipstick tube.
15. Separate the crankshaft pulley from the crankshaft.
16. Remove the timing covers.
17. Relieve the tension from the balancer belt by loosening the adjusting bolt no more than 180°.
18. Remove the balancer belt.

See Figure 46

Fig. Fig. 46: Removing the balancer belt

19. Relieve the tension from the timing belt by loosening the adjusting bolt no more than 180°, then remove the timing belt.

See Figure 47

Fig. Fig. 47: Loosen the adjusting bolt, then remove the timing belt

To install:

Do not turn the engine with the timing belt removed. This is an interference engine and the pistons may hit the valves if the valve train is out of sync with the crankshaft.

20. Remove the spark plugs from the cylinder head.
21. Remove the timing belt guide plate by first removing the balancer belt drive.
22. Position the number one piston at top dead center.
23. Position the camshaft pulleys at the top dead center mark on the back cover.

See Figure 48

Fig. Fig. 48: Left and right camshaft timing marks.

24. Install the timing belt in the following order:
    1. Loop the belt over the timing belt drive pulley.
    2. Install the timing belt around the adjusting pulley.
    3. Place it around the left camshaft pulley.
    4. Install it under the bottom of the water pump pulley.
    5. Route the belt around the right camshaft pulley.

See Figure 49

Fig. Fig. 49: Make sure the timing belt is routed correctly

25. To tension the timing belt, loosen the adjusting nut.
26. Once the adjuster spring has applied tension to the timing belt, retighten the adjusting nut.
27. Install the lower and upper timing belt covers.
28. After installing the crankshaft pulley, tighten the bolt to the proper specs.
29. To check that the timing belt has positioned itself on the pulley by rotating the crankshaft pulley about five to six turns.
30. Adjust the timing belt tension and check that the crankshaft and camshaft pulleys are at top dead center (TDC).
31. If the camshafts are not at TDC, remove the timing belt and adjust the pulleys by repeating the above procedure.
32. Install the remaining components in the reverse of removal procedure.
33. Connect the negative battery cable.

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This details will help you.

For all types of

Timing belt routing diagrams for cars and trucks?

Click the link below:---

http://technoanswers.blogspot.com/2011/10/timing-belt-routing-diagrams-for-cars.html

For all types of 

Drive belt routing diagrams for cars and trucks?

Click the link below:---

http://technoanswers.blogspot.com/2011/10/drive-belt-routing-diagrams-for-cars.html