Contents: Removal ↡ Installation ↡
Caution! If the valve control parts are to be used again, they must be installed in the same places. To avoid mixing up the parts, we recommend making a panel for their storage. The camshafts are removed upwards with the cylinder head installed.
Removal
1. Disconnect the battery ground (–) cable.
Attention! This will erase the radio's anti-theft code.
2. Loosen the V-ribbed belt.
3. Remove the cylinder head cover.
4. Remove the front cover.
5. Set cylinder 1 to TDC.
6. Mark the position of the timing chain relative to each of the two camshaft sprockets by applying a paint stroke to the chain and sprocket.
7. Unscrew and remove the intake camshaft gear.
8. Remove the timing chain from the intake camshaft gear.
9. Check whether the camshafts are in the basic position. The adjustment holes with a diameter of 4 mm at the basic position of the camshafts are located respectively on the outside of the upper edge of the cylinder head (arrows). The camshaft adjuster is in the direction of "spat" (late).
Caution! Remove and install camshafts only in the basic position. They are very sensitive to breakage and therefore should be mounted, if possible, without tension.
10. Unscrew the bearing caps of camshafts 1 and 8. Remove the bearing caps.
Attention! First loosen the bearing cap bolts crosswise by 1/2 turn, then loosen all the bolts by one turn and then unscrew.
11. To disassemble the intake camshaft, first remove bearing caps 9, 12 and 14.
12. Then remove bearing caps 10, 12 and 13. While doing this, loosen the bolts alternately and slowly until the resistance is removed.
13. To disassemble the exhaust camshaft, first remove bearing caps 4, 5 and 7.
14. Finally, remove bearing caps 2, 3 and 6. Loosen the bolts slowly and alternately until the resistance is removed.
15. Remove the camshafts.
Installation
1. Thoroughly clean all mounting parts with cleaning gasoline, clean the sealing surfaces.
2. Check the tappets.
3. Lubricate the camshafts and bearing areas with engine oil.
Attention! When replacing camshafts, ensure that they are identified correctly. The camshaft identifier is located at the installation locations of bearings 3 and 10 behind the bearing cap. The letters following the identifier are only a designation of the technological operation.
4. Install the intake camshaft so that the sharp ends of the cam lobes in the middle of the third cylinder are facing down.
5. First, mount bearing caps 10, 11 and 13. In doing so, tighten the bolts crosswise, alternately, by one turn, respectively.
6. Then mount bearing caps 9, 12 and 14.
7. Place the timing chain on the intake camshaft gear.
8. Insert the intake camshaft gear into the timing chain and secure it with a new flange bolt to a torque of 20 Nm. Then tighten the bolt further by 90° using an open-end wrench.
9. Check that the markings on the camshaft gears and the control chain applied during dismantling match.
10. Install the cylinder head cover.
11. Set the time on the clock.
12. Set the radio anti-theft code.