Removal the timing chain (Mazda CX-5KE)

Note:

: replace the part with a new one after each removal.

: use a special tool or device.

Attention.

• If the camshaft is rotated after the drive chain is removed, the valves may hit the piston crown when the piston is at top dead center, causing engine damage. When rotating the camshaft with the drive chain removed, all engine pistons must be set to the middle position.
• When turning the camshaft with a hex key, the key may hit the rocker arm and damage it. To prevent damage to the rocker arm, when holding the camshaft by the hex key, place the key toward the rear of the engine as shown in the figure to ensure a safe clearance between the key and the camshaft lobe.

Note: The width of the hexagonal part of the camshaft is 22-24mm.

1. Disconnect the negative battery terminal.

2. Remove the decorative engine cover.

3. Remove the ignition coils/ion sensors.

4. Remove the front protective tray No.2.

5. Remove the mudguard.

6. Remove the accessory drive belts.

7. Drain the engine oil.

8. Remove the oil dipstick from the engine.

9. Loosen the mounting bolts and remove the cylinder head cover with the gasket.

10. Loosen the mounting bolts and remove the oil spray pipe from the cylinder head.

Caution: Be careful not to damage the grooves and surfaces of the water pump pulley when using tools, otherwise it may cause increased wear and damage to the drive belt, abnormal noise during operation, and damage to the pulley and rust.

11. Align the hole in the water pump pulley with the hole in the pump body as shown in the figure.



12. Insert a suitable bolt (approximately 70 mm long) into the water pump hole as shown in the figure to lock the water pump pulley from turning.





13. Remove the water pump pulley.

14. Loosen the mounting bolt and remove the water pump pulley.

15. Remove the bolt used to lock the pulley from turning.

16. Using a special device, secure the flywheel ring gear from turning.



17. Loosen the crankshaft pulley bolt.

18. Remove the crankshaft pulley.

19. Loosen the mounting bolts and remove the electric drive of the valve timing regulator.

20. Loosen the mounting bolts and remove the oil pan, using a special cutter to cut the sealant between the pan and the cylinder block.



21. Loosen the bolts securing the front engine cover. Using a screwdriver wrapped in cloth, gradually separate the sealant and remove the front engine cover.

Attention.

• Do not apply excessive force to the screwdriver. Otherwise, the front cover of the engine may be damaged.
• Be careful not to scratch or damage the contact surfaces, otherwise oil leaks may occur later.

22. Remove chain guide No.1.

23. While moving the exhaust camshaft back and forth in the direction of the arrow in the figure using a wrench mounted on the hexagonal part, press the drive chain tensioner plate with a screwdriver and release the plunger lock.

Note: As the exhaust camshaft moves back and forth, the drive chain pushes the plunger into the tensioner, facilitating the movement of the plate.

24. Slowly press the plunger in the direction of the arrow in the figure with the plate pressed down.



25. Remove the screwdriver from the plate, continuing to press the plunger.

26. Gradually remove the force from the plunger and move it forward and backward by 2-3 mm.

27. Insert a wire with a diameter of approximately 1.5 mm or a rolled-up paper tube into the hole of the plate and the tensioner body to fix the plate and lock the plunger.



28. Remove the chain tensioner and tensioner shoe.

29. Remove the timing chain.

30. Remove the timing chain damper No.2.

31. Remove the crankshaft sprocket.

32. Loosen the balance shaft sprocket and oil pump mounting bolts.

Note: At this stage, you only need to loosen the mounting bolts, not remove them completely. The bolts are removed after the oil pump drive chain tensioner is removed.

33. Insert a screwdriver wrapped in cloth into the gap between the oil pump sprocket and the drive chain as shown in the figure.



34. By moving the screwdriver in the direction of the arrow in the figure, press the oil pump drive chain against the tensioner and press the tensioner plunger.

35. With the plunger pressed in, insert a wire with a diameter of approximately 1.4 mm or a rolled-up piece of paper into the hole in the oil pump chain tensioner housing.

Note: The wire or rolled up paper will hold the plunger in place, which will take the tension off the drive chain.

36. Remove the oil pump drive chain tensioner.



37. Remove the oil pump drive chain with the balance shaft sprocket as one unit.

38. Remove the oil pump sprocket.

39. Loosen the mounting bolts and remove the oil pump drive chain guide.

40. Remove the oil pump drive sprocket from the crankshaft.

41. Remove the key from the crankshaft.