Overhaul

WM 155519 Removing and installing solenoid hydraulic valve (valve lift control)





Removing hydraulic valve for valve lift control

Removing hydraulic valve for valve lift control

Caution:
Risk of oil contamination and blocked oil bores
Faulty engine parts, engine damage

- Absolute cleanliness is essential when working on hydraulic valves.

Information:
Handle the hydraulic valve with care; do not turn it at the valve tip or at the safety contact.
A seal against leaks cannot be ensured if there is damage in the area of the retainer plate, therefore handle the pliers indicated with care.

Hydraulic valve for valve lift control





Hydraulic valve for valve lift control

1. Remove the side shield on the relevant side of the engine. To do this, unscrew the two M6 x 16 Torx screws -arrows-.





Removing and installing shield

2. Disconnect cable plug on hydraulic valve -1- by pressing the clip and pulling off the cable plug.





Hydraulic valve for valve lift control

3. Unscrew two M6 x 20 inner Torx screws -2- at the valve holder and remove the holder -B- along with the screws.





Holder for solenoid hydraulic valves

4. Carefully pull the hydraulic valve with retainer plate -2- out of the cylinder head cover. Make sure that the front spring does not remain in the cylinder head. Observe installation position of the hydraulic valve (position of cable plug connection).





Retainer plate with seal - installation position of valve for camshaft timing and valve lift control

Installing hydraulic valve for valve lift control

Installing hydraulic valve for valve lift control

Information:
Always replace O-ring on hydraulic valve and retainer plate with integrated seal.
Observe installation position of hydraulic valve.

1. Before installation, coat the O-ring and the retainer plate seal with engine oil. Then carefully fit the hydraulic valve with retainer plate into the cylinder head cover.
2. Position two M6 x 20 inner Torx screws complete with holder -B- on the valve and tighten the screws. Tightening torque: 7.5 ftlb.





Holder for solenoid hydraulic valves

3. Attach cable plug -1-. Make sure that the plug engages audibly.





Hydraulic valve for valve lift control

4. Fit the side shield to the relevant side of the engine. To do this, insert and tighten the two M6 x 16 Torx screws -arrows-. - Tightening torque: 7.5 ftlb.





Removing and installing shield