Removing
1. Disconnect a wire from the negative plug of the storage battery.
2. Remove the air filter.
3. Remove the accessory drive belt.
4. Remove ignition coils.
5. Set the piston of the first cylinder to the TDC of the compression stroke.
6. Rotate the crankshaft 90°in the direction of rotation to avoid hitting the piston and valves.
7. Loosen the DVVT sprocket mounting bolt by securing the intake camshaft with a wrench at the hex section.
Note: do not remove the bolt.
8. Use a hex key to remove the service port plug.
9. Through the service hole, move the lock plate down and push the plunger into the tensioner.
Note: If it is difficult to fix the lock plate, use a wrench to turn the camshaft slightly left and right.
10. Align the hole in the lock plate and the tensioner, set the hex to 2.5 mm.
11. Remove the tensioner with the hexagon installed.
12. Remove the timing chain from the camshaft sprockets.
13. Turn out bolts in the sequence shown in drawing, and remove covers of bearings of camshafts.
14. Remove the camshafts and secure the chain against falling.
15. Check the DVVT system sprocket.
A) Fix the camshaft in a vise.
b) Tighten the DVVT sprocket bolt.
V) Tape the camshaft, then make a hole in one of the advance ports.
G) Apply pressurized air to the advance port. This will unlock it.
Note: This operation may cause oil splashing.
d) Make sure that the DVVT system sprocket is unlocked and that the sprocket can be rotated by hand without binding through an angle of about 30°.
Note: The DVVT system sprocket will be locked when rotated through a larger delay angle.
e) After completing the test, lock the sprocket in the hold position. Turn out a bolt.
Installation
Note: Below are the basic procedures for installing camshafts.
1. Turn the crankshaft clockwise 90°from TDC on the first cylinder compression stroke. This is necessary in order to avoid collision between the valves and the piston when installing the camshafts.
2. Install the camshafts.
A) Apply engine oil to the camshaft cams, the camshaft seats on the cylinder head, and the top of the tappets.
b) Install the camshafts with the cams oriented as shown.
Removal and installation of camshafts.
1 - cylinder head cover,
2 - gasket,
3 - cover No. 2 of the timing chain,
4 - asterisk of the DVVT system,
5 - plug,
6 - chain tensioner,
7 - timing chain,
8 - cover No. 1 of the camshaft bearing shells,
9 - covers No. 2 of the camshaft bearing shells,
10 - intake camshaft,
11 - exhaust camshaft,
12 - camshaft sprocket.
V) Establish covers of loose leaves of bearings of camshafts and tighten bolts of their fastening in the sequence shown in drawing.
- Tightening torque - 12.5 + 2.0 Nm
Note: Make sure the arrows on the covers are facing towards the front of the engine.
3. Install the DWT system sprocket.
A) Install the DVVT sprocket onto the camshaft, aligning the pin with the pin hole.
Note: Turn the sprocket slightly to make sure the pin is seated securely in the mounting hole.
b) Install the timing chain by matching the marks on the sprocket and chain.
V) Install the chain tensioner and remove the hexagon from it.
G) Fix the camshaft with a wrench at the hexagonal section from rotation and tighten the sprocket mounting nut.
- Tightening torque - 40 - 54 Nm
d) Clean the service port plug and hole, apply fresh sealant to the plug and screw it into the timing chain cover.
- Tightening torque - 12.5 - 21.5 Nm
4. Apply sealant to timing chain cover #2 and install.
5. Install the cylinder head cover.
A) Install the gasket in the cylinder head cover.
b) Apply sealant to the places shown in the picture.
V) Establish a cover of a head of the block of cylinders and tighten bolts of its fastening in the sequence shown in drawing.
G) Install two nuts with gaskets on the cover.
5. Install ignition coils. Install accessory drive belts.
3. Install the air filter.
9. Connect a wire to the negative plug of the storage battery.