Cruze

Valve Clearance Adjustment - 1.6L LDE, LXV, 1.8L 2H0

Special Tools

For equivalent regional tools, refer to Special Tools .

1. Remove the camshaft adjuster. Refer to Camshaft Position Actuator Adjuster Removal .
2. Remove the timing belt rear cover. Refer to Timing Belt Rear Cover Replacement : 1.6L LDE, LXV, 1.8L 2H0, and LUW .
3. Remove exhaust camshaft position sensor. Refer to Camshaft Position Sensor Replacement : LDE, LXV, LUW, 2H0 .
4. Remove inlet camshaft position sensor. Refer to Camshaft Position Sensor Replacement : LDE, LXV, LUW, 2H0 .
5. Remove the EN-6628-A locking tool.

1. Inspect the 2 valve backlash, inlet valve cylinder 1.

1.1.	Turn the inlet 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 clearance.

Write down the result.

2. Inspect the 2 valve backlash, inlet valve cylinder 3.

2.1.	Turn the inlet 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 clearance.

Write down the result.

3. Inspect the 2 valve backlash, inlet valve cylinder 4.

3.1.	Turn the inlet 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 clearance.

Write down the result.

4. Inspect the 2 valve backlash, inlet valve cylinder 2.

4.1.	Turn the inlet 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 clearance.

Write down the result.

5. Inspect the 2 valve backlash, exhaust valve cylinder 4.

5.1.	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.

5.2.	Insert the EN-6361 gauge, inspect the valve clearance.

Write down the result.

6. Inspect the 2 valve backlash, exhaust valve cylinder 2.

6.1.	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.

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

Write down the result.

7. Inspect the 2 valve backlash, exhaust valve cylinder 1.

7.1.	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.

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

Write down the result.

8. Inspect the 2 valve backlash, exhaust valve cylinder 3.

8.1.	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.

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

Write down the result.





Note: Note the removal sequence 1-4.

9. Remove the 4 camshaft bearing support bolts.
10. Release the bearing support by striking it gently with a plastic hammer.
11. Remove the 1st camshaft bearing support (1).




Note: Mark the exhaust camshaft bearing caps before removal.

12. Loosen the 8 exhaust camshaft bearing cap bolts, working from outside to inside in a spiral in steps of 1/2 up to 1 turn.
13. Remove the 8 exhaust camshaft bearing cap bolts.
14. Remove the 4 exhaust camshaft bearing caps Numbers 6-9 from the cylinder head.
15. Remove the exhaust camshaft (1).

Note: Mark the inlet camshaft bearing caps before removal.

16. Loosen the 8 inlet camshaft bearing cap bolts, working from outside to inside in a spiral in steps of 1/2 up to 1 turn.
17. Remove the 8 inlet camshaft bearing cap bolts.
18. Remove the 4 inlet camshaft bearing caps Numbers 2-5 from the cylinder head.
19. Remove the inlet camshaft (1).



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



21. Example for determine valve tappet size.

21.1.

Measurement of the cup tappet installed 3.12 mm (0.123 in), identification number 12.

21.2.

Measured value between cams and cup tappets +0.31 mm (0.012 in) = 3.43 mm (0.135 in).

21.3.

Required value, intake valve clearance - 0.25 mm (0.010 in).

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

21.4.

Measurement of the new cup tappet = 3.18 mm (0.125 in), identification number 18.

21.5.

Use a valve tappet with this dimension or one that is nearest to it.

22. Refer to Engine Mechanical Specifications : 1.6L LDE, LED, LFJ → 1.8L 2H0 for the valve clearance values.
23. Refer to Electronic Parts Catalogue for the valve tappets sizes.

Note: Observe the correct assignment.

Note: Coat the sliding surfaces with NEW engine oil.

1. Install the 16 tappets (1), using the EN 845 suction device .
2. Install the camshafts. Refer to Camshaft Replacement : 1.6L LDE, LXV, and 1.8L 2H0 .