Contents: Removal ⬇ Installation ⬇
Removal
Note.
- The ignition must be turned off and the key removed from the ignition switch.
- This engine has its camshafts stacked in the camshaft housing. Before removing the camshaft housing, the valve timing chain housing must be removed.
Note: The mating surface of the camshaft housing is not subject to any treatment.
1. Remove the plastic cylinder head cover.
2. Remove the timing chain housing.
3. Turn the crankshaft to TDC of the piston of the 1st cylinder, then turn it approximately 45° back against the direction of the engine shaft and remove the chain drive sprockets together with the camshaft drive chain.
4. Unscrew the fastening element and disconnect the ground wire from the camshaft housing.
5. Remove the ignition coils.
6. Remove the wire holder together with the wire harness from the camshaft housing.
7. Remove the oil level indicator.
8. Remove the intake manifold.
9. Unscrew the mounting bolts and remove the left eye.
10. Loosen the camshaft housing mounting bolts crosswise from the outside towards the inside.
11. Remove the mounting bolts and remove the camshaft housing.
Installation
Caution: Neither piston should be at TDC.
Caution: When working with the seal remover and degreaser, wear protective gloves and goggles.
1. Remove any remaining sealant from the cylinder head and camshaft housing using a chemical sealant remover.
Note: Make sure that no dirt or sealant residue gets into the cylinder head or camshaft housing.
2. Turn the camshaft that operates the intake valves and the camshaft that operates the exhaust valves until the camshaft position lock "T10171" or "T10171A" can be inserted into the holes in the camshafts as far as it will go.
3. To fix the camshaft position lock "T10171" or "T10171A", screw the M6 screw by hand without tightening it additionally.
4. Clean and degrease the sealing surfaces thoroughly. They must be free of oil or grease.
5. Replace the mesh oil filter (1) shown in the figure below, insert it into the cylinder head.
6. Insert 4 new sealing rings (2) into the grooves of the cylinder head, as shown in the figure below.
7. Ensure that all rocker arms are correctly seated on the ends of the valve stems (1) and that they are correctly secured to the corresponding hydraulic lifters (2), as shown in the figure below.
8. Before installing the camshaft housing, screw two guide bolts (M6x80) into the cylinder head.
9. Apply the sealing agent evenly and in a thin layer to the clean sealing surface of the camshaft housing.
10. No sealing agent is applied to the areas marked with arrows A. The sealing rings inserted into the cylinder head are sealed here.
Note: Do not apply sealant to the area marked with arrow B. The mesh oil filter seals here.
Note. The sealing agent must not be applied too thickly, otherwise excess sealant can get into the oil pan and clog the oil channels, which can lead to engine failure.
11. Carefully install the camshaft housing vertically from above onto the guide bolts (arrows) and onto the centering pins in the cylinder head, as shown in the figure below.
Note: Make sure that no oil residue drips onto the sealing surface and that the camshaft housing does not become warped.
12. The new camshaft housing mounting bolts should be tightened evenly in a cross pattern from the inside out. Tightening torque: 10 Nm + an additional 90° (¼ turn).
Note: After installing the camshaft housing, the sealant must dry for at least 30 minutes.
13. Adjust the valve timing.
14. Further installation is carried out in the reverse order of removal.
15. Install the timing chain housing.
16. Connect the negative terminal to the battery.
17. Clear the fault memory, eliminate possible faults and reset the fault memory contents using special equipment.