Removing and Installing Hydraulic Valve For Valve Lift Adjustment - Engine Installed

WM 155519 Removing and installing hydraulic valve for valve lift adjustment - engine installed

Caution
Risk of soiling! Absolute cleanliness is essential when working with hydraulic valves!





Removing hydraulic valve for valve lift adjustment





Figure shows cylinder side 1-3

1. Remove the side shield on the respective side of the engine. Unscrew the two M6 hexagon-head bolts for this purpose.





2. Remove cable plug of the hydraulic valve for valve lift adjustment -1- by pressing the clip and pulling off the cable plug.
3. Unscrew both M6 pan-head screws (hexagon socket a/f 5) -item 2 in the previous Figure- of the valve holder and remove the holder with the screws -B-.








4. Carefully pull the hydraulic valve with retainer plate -3- 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 the cable plug connection)!

Information
^ Handle the hydraulic valve with care; do not turn it at the valve tip or at the plug connection!

Installing hydraulic valve for valve lift adjustment

Information
^ Always replace O-ring of the hydraulic valve and retainer plate with integral seal!

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 (refer to the removal description for the installation position).
2. Fit both M6 pan-head screws (hexagon socket a/f 5) complete with holder -B- on the valve and tighten the screws.





Tightening torque 10 Nm (7.5 ftlb.)

3. Push on the cable plug again. Make sure that the plug audibly engages.





4. Fit the side shield on the respective side of the engine. Put on and tighten the two M6 hexagon-head bolts for this purpose.

Tightening torque 10 Nm (7.5 ftlb.)