Variable Valve Timing Actuator: Service and Repair

WM 153719 Removing and installing solenoid/hydraulic valve for camshaft adjuster

Tools





Preliminary work

1. Remove valve cover -> 158219 Removing and installing cylinder head cover - section on "Removing" Service and Repair.

Removing solenoid/hydraulic valve for camshaft adjuster

1. Unscrew fastening screws for hydraulic valve -4-.
2. Carefully pull the hydraulic valve -3- up and out. To do this, use relay puller 9235. Hold hydraulic valve only at the metal insert.





Camshaft adjustment





3. Inspect strainer of hydraulic valve and clean with solvent naphtha if necessary. Replace hydraulic valve if heavily soiled.

Installing solenoid/hydraulic valve for camshaft adjuster

Information

The tightening specifications for the basic engine are stored centrally. -> 1001IN Tightening torques, tightening sequences, assembly overviews [1][2]Specifications. Tightening torques and assembly instructions for other assemblies (e.g. chassis, electrics, transmission or body) or for peripheral engine equipment can be found in the corresponding documents.

1. Replace sealing ring on hydraulic valve. Do not insert sealing ring twisted when fitting it.
2. Coat sealing ring lightly with engine oil and insert the hydraulic valve into the cylinder head. Any installation position is possible.
3. Fit and tighten fastening screws.





Camshaft adjustment





Subsequent work

1. Install valve cover -> 158219 Removing and installing cylinder head cover - section on "Installing" Service and Repair.