Variable Valve Timing Actuator: Service and Repair

WM 153719 Removing and installing hydraulic valve for camshaft control on V6 DFI engines

Tools





Technical values






Preliminary work

1. Remove intake-air distributor. -> 244619 Removing and installing intake-air distributor - section on "Removing" Overhaul
2. Remove bar ignition modules. -> 282020 Removing and installing DFI bar ignition modules - section on "Removing" Service and Repair
3. Remove cylinder head cover.-> 158219 Removing and installing cylinder head cover on V6 DFI engines - section on "Removing" Overhaul
4. Remove the timing-case cover at the top.-> 153319 Removing and installing timing-case cover on V6 DFI engines - section on "Removing" Service and Repair

Removing solenoid/hydraulic valves for camshaft controllers

Information

- Have a mirror to hand for the following work.

- Press a lint-free cloth into the timing chain housing so that the fastening screws cannot fall into the timing chain housing.

- If a fastening screw falls into the timing chain housing, the engine must be removed and the lower timing-case cover must also be removed.

1. Unscrew the fastening screws -arrows- on the camshaft controllers using a socket wrench.





Hydraulic valve on camshaft controller





2. Carefully pull out the solenoid valves using special tool relay puller 9235.

Installing solenoid/hydraulic valves for camshaft controllers

CAUTION

Risk of damage due to:

- Scoring, scratches, dirt and impurities on the solenoid valve and timing chain housing.
- Bangs and impact on solenoid valves.

-> Coat sealing rings with clean engine oil.
-> Clean solenoid valve and timing chain housing.

CAUTION

Risk of damage to solenoid valves.

- Sealing ring can be damaged.
- Incorrect tightening torque.

-> Press in solenoid valve firmly with your hand.

1. Install solenoid valves.
1.1. Coat sealing ring with clean engine oil.
1.2. Carefully position solenoid valves vertically with respect to the valve axis and press them as far as they will go into the housing with your hand.
1.3. Tighten fastening screws -arrows- to => Tightening torque: 4 Nm (3 ftlb.).





Hydraulic valve on camshaft controller

Subsequent work

1. Install timing-case cover at the top. -> 153319 Removing and installing timing-case cover on V6 DFI engines - section on "Installing" Service and Repair
2. Install cylinder head cover. -> 158219 Removing and installing cylinder head cover on V6 DFI engines - section on "Installing" Overhaul
3. Install bar ignition module. -> 282020 Removing and installing DFI bar ignition modules - section on "Installing" Service and Repair
4. Install intake-air distributor. -> 244619 Removing and installing intake-air distributor on DFI engines - section on "Installing" Overhaul