VALVE CLEARANCE ADJUSTMENT [L3]

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1. Disconnect the negative battery cable.

2. Remove the splash shield (RH).

3. Remove the ignition coils. (See IGNITION COIL REMOVAL/INSTALLATION [L3])

4. Disconnect the oil control valve (OCV) connector.

5. Remove the ventilation hose.

6. Remove the cylinder head cover.

7. Remove the drive belt. (See DRIVE BELT REMOVAL/INSTALLATION [L3].)

8. Remove the engine front cover lower blind plug.

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9. Remove the engine front cover upper blind plug.

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10. Remove the cylinder block lower blind plug, and install the SST.

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11. Rotate the crankshaft in the direction of the engine rotation so that the No.1 piston is at TDC of the compression stroke. (Until the counterweight contacts SST and stops.)

12. Loosen the timing chain using the following procedure.

(1) Insert a suitable bolt (M6 X 1.0, length 25—35 mm {0.99—1.3 in}) into the engine front cover upper blind plug and tighten it until it contacts the chain tensioner arm, and then rotate it back one turn. (Set the bolt slightly away from the chain tensioner arm so that it does not contact it.)

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(2) Using the cast hexagon on the exhaust camshaft, apply force counterclockwise to facilitate unlocking the chain tensioner ratchet.

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(3) Using a Hex bit socket (2.5 mm {0.098 in}) or T15 Torx bit socket, unlock the chain tensioner ratchet so that it can be lifted up.

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(4) Using the cast hexagon on the exhaust camshaft, apply force in the direction of the engine rotation to increase tension on the chain.

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Note

• The chain tensioner rack is compressed using the chain tension generated by applying force to the exhaust camshaft in the direction of the engine rotation.

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Note

• The ratchet has not been unlocked if the bolt cannot be pressed in approx. 5 mm {0.2 in}.

(5) Screw in the bolt set in Step 1 approx. 5 mm {0.2 in} and secure the tensioner arm with the rack compressed.

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• If the tensioner arm cannot be secured, return the bolt to its original position and repeat the procedure from Step 3.

13. Fix the exhaust camshaft using a wrench on the cast hexagon, and loosen the camshaft sprocket bolt.

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Caution

• Perform the work carefully so that the washer does not drop out.

14. Remove the exhaust camshaft sprocket bolt, exhaust camshaft sprocket, and washer as a single unit.

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15. Remove the oil control valve (OCV). (See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [L3].)

Note

• The camshaft caps are to be kept ordered for correct reassembly in their original positions. Do not mix the caps.

16. Loosen the camshaft cap bolts in several passes in the order shown.

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17. Remove the camshafts for the intake and exhaust sides.

18. Remove the tappet.

19. Select proper adjustment shim.

New adjustment shim

= Removed shim thickness + Measured valve clearance - Standard valve clearance (IN: 0.25 mm {0.0098 in}, EX: 0.30 mm {0.0118 in})

Valve clearance [Engine cold]

IN: 0.22—0.28 mm {0.0087—0.0110 in}

EX: 0.27—0.33 mm {0.0106—0.0130 in}

20. Verify that the No.1 cylinder is at TDC of the compression stroke. (The position counter weight contacts the SST.)

21. Apply the gear oil (SAE No. 90 or equivalent) to each journal of the cylinder head as shown in the figure.

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22. Install the camshaft with No.1 cylinder aligned with the TDC position.

23. Apply the gear oil (SAE No. 90 or equivalent) to each journal of the camshaft as shown in the figure.

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24. Temporarily tighten the camshaft cap bolts evenly in 2—3 steps.

25. Tighten the camshaft cap bolts in the order shown in the following two steps.

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Tightening torque

1st step: 5.0—8.0 N·m {51.0—81.5 kgf·cm, 44.3—70.8 in·lbf}

2nd step: 14—17 N·m {1.43—1.73 kgf·m, 10.4—12.5 ft·lbf}

26. Install the OCV. (See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [L3].)

Caution

• Install a washer to the fourth or fifth thread of the exhaust camshaft sprocket bolt being careful not to drop the washer.

• Do not tighten the camshaft sprocket bolt at this stage. Verify the valve timing before performing the bolt tightening.

27. Install the exhaust camshaft sprocket bolt, exhaust camshaft sprocket, and a new washer as a single unit.

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28. Install the SST to the camshaft as shown.

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29. Remove the installation bolt for the engine front cover upper blind plug (M6 X 1.0 length 25—35mm {0.99—1.3 in}), and apply tension to the timing chain.

30. Rotate the crankshaft clockwise and verify that the No.1 cylinder is at TDC of the compression stroke. (The position counter weight contacts the SST.)

31. Fix the exhaust camshaft using a wrench on the cast hexagon, and tighten the sprocket bolt.

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Tightening torque

89—95 N·m {9.1—9.6 kgf·m, 66—70 ft·lbf}

32. Remove the SST from the camshaft.

33. Remove the SST from the block lower blind plug.

34. Rotate the crankshaft clockwise two turns until the TDC position.

• If not aligned, loosen the camshaft sprocket bolt and repeat the procedure from Step 28.

35. Apply the silicone sealant and install the engine front cover upper blind plug.

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Tightening torque

8.0—11.5 N·m {82—117 kgf·cm, 71—101 in·lbf}

36. Install the cylinder block lower blind plug.

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Tightening torque

18—22 N·m {1.9—2.2 kgf·m, 13.3—16.2 ft·lbf}

37. Install a new engine front cover lower blind plug.

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Tightening torque

10—14 N·m {102—142 kgf·m, 89—123 in·lbf}

38. Install the drive belt. (See DRIVE BELT REMOVAL/INSTALLATION [L3].)

39. Install the cylinder head cover.

40. Install the ventilation hose.

41. Connect the oil control valve (OCV) connector.

42. Install the ignition coils. (See IGNITION COIL REMOVAL/INSTALLATION [L3])

43. Install the splash shield (RH).

44. Connect the negative battery cable.