Special tool
Position tool 303-645 | Camshaft installation/locking tool 303-530 | Tool for tensioning the timing chain 303-532 |
Removing
1. Disconnect the wire "masses" from the battery. For more information refer to Specification.
2. Remove the battery tray. For more information, refer to Battery Mounting Shelf (76.10.30)
3.
WARNING: It is forbidden to carry out work on a vehicle standing on only one jack. Always support the vehicle with jack stands.
Raise and support the vehicle.
4. Remove the engine front cover. For more information refer to Engine front cover (12.65.01)
5. Remove the crankshaft position sensor (TFR sensor). For more information refer to Crankshaft Position Sensor (TFR) (18.30.12)
6. Turn the crankshaft until the flat surfaces on the camshafts are parallel to the contact surfaces of the cylinder head.
7.
NOTE: The engine is now in the SAFE position.
Block the crankshaft.
- Reinstall the special tool.
- Screw in the screw.
8. Remove the valve timing control unit (VCT) right camshaft.
- Turn out 3 bolts.
- Remove and discard o-rings.
9. Establish the special tool on a head of cylinders of the right number. Screw in three bolts.
10. Remove the right primary timing chain tensioner. Turn out two bolts.
11. Remove the right primary timing chain tensioner guide. Turn out a bolt.
12. Remove the right primary timing chain.
13. Remove the valve timing control unit (VCT) left camshaft. Turn out two bolts.
- Remove the nut.
- Remove and discard o-rings.
14. Establish the special tool on a head of cylinders of the left number. Screw in three bolts.
15. Remove the left primary timing chain tensioner. Turn out two bolts.
16. Remove the top and bottom guides of the left primary timing chain tensioner.
- Unscrew the pin.
- Turn out a bolt.
17. Remove the left primary timing chain.
18.
CAUTION: Discard bolts as they are no longer needed.
Remove the camshaft sprockets. Turn out two bolts.
19. Remove the secondary timing chain tensioner and secondary timing chain. Turn out two bolts.
20. Remove the special tool from a head of cylinders of the left number. Turn out 3 bolts.
21.
CAUTION: Loosen the camshaft bearing caps evenly and gradually.
NOTE: Remove the camshaft bearing caps. Note: note their position, direction and markings. Each lid is marked with its position (number) and directions (arrow).
Remove the camshaft bearing caps. Remove 20 bolts.
22. Remove camshafts.
Installation
1. Check up and adjust backlashes of pushers of valves.
2. Replace the valve shims with the thinner available shims. Apply a thin coat of clean engine oil to the new valve shims.
3. Install the camshafts.
- Clean the contact surfaces of the parts.
- Lubricate the journals and camshaft cams.
5. Screw the Torx sprocket bolts into the camshafts.
6.
CAUTION: The camshaft lobes must be rotated 180 degrees from their respective valve lifters or the valve clearance will be incorrect.
Measure and record the valve clearances. Turn the sprockets on the Torx head bolts.
7.
NOTE: Loosen the camshaft bearing caps evenly and gradually
NOTE: Remove the camshaft bearing caps. Note: note their position, direction and markings. Each lid is marked with its position (number) and directions (arrow).
Remove camshafts. Remove 20 bolts.
8. Remove the valve lifters, replace them with selected pushers.
9. Install camshafts.
- Lubricate the journals and camshaft cams.
- Clean the contact surfaces of the parts.
11.
CAUTION: The camshaft lobes must be rotated 180 degrees from their respective valve lifters or the valve clearance will be incorrect.
Check if the valve clearances are adjusted correctly.
- Turn the sprockets on the Torx head bolts.
- Upon completion of the check, remove the Torx head bolts from the camshafts.
13.
NOTE: The illustration shows the right side, on the left side the procedure is the same.
Sink the left side timing chain tensioner piston. Hold the chain tensioner piston with a metal pin with a diameter of 1 mm.
14. Install the left side timing chain tensioner and chain onto the camshaft sprockets.
15. Screw in the left side timing chain tensioner tensioner bolts. Tighten the bolts (tightening torque 12 Nm).
16.
NOTE: Lightly tighten Torx head bolts to secure sprocket to camshaft, sprockets MUST move freely.
Install the left side secondary timing chain tensioner and sprocket onto the camshafts. Install the Torx head bolts to secure the sprocket to the camshafts.
17. Tension the secondary timing chain. Remove the pin.
18. Put on the left side primary timing chain. Make sure the loose side of the timing chain is on the tensioner side.
19. Install the left side primary timing chain tensioner guide. Tighten the hairpin (tightening torque 12 Nm).
20.
WARNING: While compressing the tensioner, do not release the ratchet until the tensioner piston is fully retracted into the hole. Failure to do so will result in damage to the ratchet.
Install the left side primary timing chain tensioner.
- Hold the chain tensioner piston with a metal pin with a diameter of 3 mm.
- Tighten the bolts (tightening torque 12 Nm).
- Remove the pin.
21.
CAUTION: Apply counterclockwise force to the special tool to tighten the primary timing chain from its working side.
CAUTION: The intake camshaft sprocket bolt MUST be tightened up to the exhaust camshaft sprocket bolt. Failure to follow this procedure will result in engine damage.
Install the special tool on the exhaust camshaft sprocket.
- Tighten the intake camshaft sprocket bolt (tightening torque 120 Nm).
- Tighten the exhaust camshaft sprocket bolt (tightening torque 120 Nm).
22. Install the valve timing solenoid housing (VCT) left camshaft.
- Install new o-rings.
- Tighten new bolts (tightening torque 22 Nm).
- tighten the nut (tightening torque 10 Nm).
24. Install the right side primary timing chain tensioner guide. Tighten the bolts (tightening torque 12 Nm).
25.
CAUTION: While compressing the tensioner, do not release the ratchet until the tensioner piston is fully retracted into the hole. Failure to do so will result in damage to the ratchet.
Install the right side timing chain tensioner.
- Hold the chain tensioner piston with a metal pin with a diameter of 3 mm.
- Tighten the bolts (tightening torque 12 Nm).
- Remove the pin.
26.
CAUTION: Apply counterclockwise force to the special tool to tension the primary timing chain from its working side.
CAUTION: The intake camshaft sprocket bolt MUST be tightened up to the exhaust camshaft sprocket bolt. Failure to follow this procedure will result in engine damage.
CAUTION: Use new bolts.
Install the special tool on the exhaust camshaft sprocket.
- Tighten the intake camshaft sprocket bolt (tightening torque 120 Nm).
- Tighten the exhaust camshaft sprocket bolt (tightening torque 120 Nm).
- Install new o-rings.
- Tighten new bolts (tightening torque 22 Nm).
29. Remove the special tool from a head of cylinders of the right number.
30. Remove the crankshaft locking tool. Remove the screw.
31. Install the SKR sensor. For more information refer to Crankshaft Position Sensor (TFR) (18.30.12)
32.
NOTE: Check valve clearances before installing valve covers.
Install the engine front cover. For more information refer to Engine front cover (12.65.01)
33. Install the battery tray. For more information, refer to Battery Mounting Shelf (76.10.30)
Comments on this article