Removing
1. Remove sliding arm 3 (see fig. 2.24).
Pic. 2.24. Camshafts:
1. Exhaust camshaft pulley,
2. Drive chain,
3. Sliding lever,
4. Inlet camshaft pulley,
5. Key, 6. Bearing cap,
7. Exhaust camshaft,
8. Inlet camshaft,
9. Chain tensioner.
2. Set the piston of the first cylinder to the position 30°after TDC.
3. Mark the location of the camshaft pulleys 1 and 4 with respect to the drive chain 2.
4. Remove chain tensioner 9.
5. Remove the exhaust camshaft pulley 1.
6. Remove drive chain 2 from intake camshaft pulley 4.
7. Using wrench 5, turn camshafts 7 and 8 so that the cams are free.
8. Remove the camshaft bearing caps (see fig. 2.25).
Pic. 2.25. Camshaft bearing cap markings.
9. Remove camshafts 7 and 8.
Installation
10. Installation is made in an order, the return to removal. Lubricate hydraulic lifters and camshaft bearings. Install camshafts 7 and 8 in bearings so that the base circle of the cam rests on the hydraulic compensator. Replace the camshaft pulley bolts and install the exhaust camshaft pulley 1 with chain 2 fitted. Install the drive chain 2 according to the marks made before removal. Check and adjust the basic position of the camshafts.
Examination
11. Remove cylinder head cover 1 (see fig. 2.26).
Pic. 2.26. Checking the basic position of the camshafts:
1. Cylinder head cover,
2. Inlet camshaft,
3. Exhaust camshaft,
4. Camshaft bearing cap,
5. Locking pin.
12. Set the piston of the first cylinder to the position 20°after TDC (20°mark is marked on the crankshaft grooving pulley). Cams 2 and 3 of the valves of the first cylinder must be directed upwards.
13. Check the basic position of the camshafts. To do this, insert the locking pin 5 into the holes of the bearing cover 4 of the camshafts (arrow).
14. If the locking pin does not fit into both holes, adjustment is necessary.
Adjustment
5. Remove the sliding lever from the cylinder head.
6. Set the piston of the first cylinder to the position 30°after TDC.
7. Remove chain tensioner 1 (see fig. 2.27).
Pic. 2.27. Adjusting the position of the camshafts:
1. Chain tensioner,
2. Drive chain,
3. Inlet camshaft,
4. Exhaust camshaft,
5.Camshaft bearing cap,
6. Locking pin.
A. Mark on the cover of the chain drive,
B. The main position of the crankshaft to adjust the position of the camshafts,
C. Crankshaft position to check the position of the camshafts.
8. Remove the exhaust camshaft pulley 4.
9. Remove chain 2 from intake camshaft pulley 3.
10. Rotate the camshafts until they are in their basic position and locked with lock pin 5.
11. Set the piston of the first cylinder to position 20°after TDC.
12. Install chain 2 on the intake camshaft pulley 3.
13. Establish a pulley of a camshaft of final valves 4 with the chain put on it 2. Replace bolts of fastening of pulleys of camshafts.
14. Install the chain tensioner
15. Remove lock pin 5.
16. Check the basic position of the camshafts. To check, turn the crankshaft twice in the direction of rotation.
17. Install the sliding lever in the cylinder head.