Orlando

Camshaft Cleaning and Inspection

Special Tools

For equivalent regional tools, refer to Special Tools .

Note: Note the identification marking on the camshaft bearing caps.

1. Install the exhaust camshaft (1).

Lubricate the exhaust camshaft with MoS 2 lubricating paste. Refer to Adhesives, Fluids, Lubricants, and Sealers for the recommended lubricating paste.

Caution: Refer to Fastener Caution in the Preface section.

2. Tighten the camshaft bearing caps 1-4 in a spiral from the inside to the outside and tighten to 8 N·m (71 lb in).



3. Install the intake camshaft (1).

Lubricate the exhaust camshaft with MoS 2 lubricating paste. Refer to Adhesives, Fluids, Lubricants, and Sealers for the recommended lubricating paste.

4. Tighten the camshaft bearing caps 1-4 in a spiral from the inside to the outside and tighten to 8 N·m (71 lb in).




Note: 

•	Ensure no sealant reaches the camshafts.

•	Note the installation sequence 1-4.

5. Install the first camshaft bearing cap (1) and the 4 bolts and tighten to 8 N·m (71 lb in).
6. When replacing the inlet camshaft, inspect the valve backlash of the inlet valves.
7. Inspect the 2 valve backlash, inlet valve cylinder 1.

7.1.	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.

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

Write down the result.

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

8.1.	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.

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

Write down the result.

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

9.1.	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.

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

Write down the result.

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

10.1.

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.

10.2.

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

Write down the result.

11. When replacing the exhaust camshaft, inspect the valve backlash of the exhaust valves.
12. Inspect the 2 valve backlash, exhaust valve cylinder 4.

12.1.

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.

12.2.

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

Write down the result.

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

13.1.

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.

13.2.

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

Write down the result.

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

14.1.

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.

14.2.

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

Write down the result.

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

15.1.

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.

15.2.

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

Write down the result.





Note: Note the removal sequence 1-4.

16. Remove the 4 camshaft bearing support bolts.
17. Release the bearing support by striking it gently with a plastic hammer.
18. Remove the 1st camshaft bearing support (1).

Note: Mark the exhaust camshaft bearing caps before removal.

19. Detach the camshaft bearing caps 1-4 working from outside to inside in a spiral in steps of 1/2 up to 1 turn.
20. Remove the camshaft bearing cover from the cylinder head.
21. Remove the inlet camshaft.

Note: Mark the inlet camshaft bearing caps before removal.

22. Detach the camshaft bearing caps 1-4 working from outside to inside in a spiral in steps of 1/2 up to 1 turn.
23. Remove the camshaft bearing cover from the cylinder head.
24. Remove the exhaust camshaft.



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



26. Determine valve tappet size.

26.1.

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

26.2.

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

26.3.

Required value, valve backlash - 0.25 mm (0.010 in)

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

26.4.

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

26.5.

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