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Valve Clearance Adjustment (LLU/A16LET)

Valve Clearance Adjustment (LLU/A16LET)



Special Tools

EN-845 Suction Device

EN-6361 Feeler Gauge


For equivalent regional tools, refer to Special Tools .

Removal Procedure


1. Remove the timing belt rear cover. Refer to Timing Belt Rear Cover Replacement .

2. Remove intake camshaft position sensor. Refer to Camshaft Position Sensor Replacement - Intake .


Adjustment Procedure


1.
Note

Counterhold at hexagon of camshaft.


Inspect the 2 valve lash, intake valve cylinder 1.

1.1. Turn the intake camshaft in the direction of engine rotation by the camshaft hexagon until the cams of cylinder 1 are in the test position.

1.2. Insert the EN-6361 gauge , inspect the valve lash.

1.3. Write down the result.

2. Inspect the 2 valve lash, intake valve cylinder 3.

2.1. Turn the intake camshaft in the direction of engine rotation by the camshaft hexagon until the cams of cylinder 3 are in the test position.

2.2. Insert the EN-6361 gauge , inspect the valve lash.

2.3. Write down the result.

3. Inspect the 2 valve lash, intake valve cylinder 4.

3.1. Turn the intake camshaft in the direction of engine rotation by the camshaft hexagon until the cams of cylinder 4 are in the test position.

3.2. Insert the EN-6361 gauge , inspect the valve lash.

3.3. Write down the result.

4. Inspect the 2 valve lash, intake valve cylinder 2.

4.1. Turn the intake camshaft in the direction of engine rotation by the camshaft hexagon until the cams of cylinder 2 are in the test position.

4.2. Insert the EN-6361 gauge , inspect the valve lash.

4.3. Write down the result.

5. When replacing the exhaust camshaft, inspect the valve lash of the exhaust valves.

6. Inspect the 2 valve lash, exhaust valve cylinder 4.

6.1. Turn the exhaust camshaft in the direction of engine rotation by the camshaft hexagon until the cams of cylinder 4 are in the test position.

6.2. Insert the EN-6361 gauge , inspect the valve lash.

6.3. Write down the result.

7. Inspect the 2 valve lash, exhaust valve cylinder 2.

7.1. Turn the exhaust camshaft in the direction of engine rotation by the camshaft hexagon until the cams of cylinder 2 are in the test position.

7.2. Insert the EN-6361 gauge , inspect the valve lash.

7.3. Write down the result.

8. Inspect the 2 valve lash, exhaust valve cylinder 1.

8.1. Turn the exhaust camshaft in the direction of engine rotation by the camshaft hexagon until the cams of cylinder 1 are in the test position.

8.2. Insert the EN-6361 gauge , inspect the valve lash.

8.3. Write down the result.

9. Inspect the 2 valve lash, exhaust valve cylinder 3.

9.1. Turn the exhaust camshaft in the direction of engine rotation by the camshaft hexagon gear until the cams of cylinder 3 are in the test position.

9.2. Insert the EN-6361 gauge , inspect the valve lash.

9.3. Write down the result.

10.
Note

Note the removal sequence 1-4. Mark the exhaust and intake camshaft bearing caps before removal.


Remove the 4 camshaft bearing front cap fasteners in sequence from the camshaft bearing front cap (1).


11. Release the intake bearing support by striking it gently with a plastic hammer.

12. Remove the camshaft bearing front cap.

13. Detach the intake camshaft bearing caps 1-4 working from outside to inside in a spiral in steps of 1/2 up to 1 turn.

14. Remove the intake camshaft bearing cover from the cylinder head.

15. Remove the intake camshaft.

16. Detach the exhaust camshaft bearing caps 1-4 working from outside to inside in a spiral in steps of 1/2 up to 1 turn.

17. Remove the exhaust camshaft bearing cover from the cylinder head.

18. Remove the exhaust camshaft.

19. Using the EN-845 device (1), remove the 16 valve tappets.


20. Determine valve lifter size.


Measurement of the cup tappet installed 3.12 mm (0.123 in) , identification number 12. Measured value between cams and cup tappets +0.31 mm (0.012 in) = 3.43 mm (0.135 in) . Required value, valve lash - 0.25 mm (0.010 in) .

Note

The identification number, arrow, is on the inside of the valve tappet.


Measurement of the new cup tappet = 3.18 mm (0.125 in) , identification number 18. Use a valve tappet with this dimension or one that is nearest to it.


Installation Procedure


1.
Note

Observe the correct assignment and coat the sliding surfaces with NEW engine oil.


Install the 16 valve lifters (1); use the EN 845 suction device.


2. Install the intake camshafts. Refer to Camshaft Replacement (Exhaust-LLU/A16LET) Camshaft Replacement (Intake-LLU/A16LET) Camshaft Replacement (Exhaust) .

3. Install the exhaust camshafts. Refer to Camshaft Replacement (Exhaust-LLU/A16LET) Camshaft Replacement (Intake-LLU/A16LET) Camshaft Replacement (Exhaust) .