Variable Valve Timing Solenoid, Replacing
See Variable valve timing solenoid, replacing
See Auxiliaries belt / belt tensioner, replacing
Note. The illustrations in this service information are used for different model years and / or models. Therefore there may be some variation. However, the essential information in the illustrations is always correct.
| CAUTION | There are a number of versions of the variable valve timing unit. Therefore it is extremely important to always read the information referring to the engine variant/model year to be remedied. |
See Removing/Installing the rear camshaft seal .
| CAUTION | Interrupt the current: Disconnect the battery negative lead. First read Battery, disconnecting . |
Remove the timing belt from the timing gear pulley for the camshafts. See Replacing the timing belt .
Check the tensioner and idler pulleys. See Replacing the timing belt .
Remove camshaft position (CMP) sensor housing and the trigger wheel.
Remove the cover at the rear edge of the camshaft.
Install adjustment tool 9995452 at the rear of the camshafts. Screw the adjustment tool sections together into one. Remove the plug from the front edge of the variable valve timing unit (Tx55).
Remove the center screw from the variable valve timing unit (Tx55). Carefully pull out the variable valve timing unit with the timing gear pulley.
The following applies to timing gear pulleys without variable valve timing
Remove the screws. Remove the timing gear pulley.
Carefully press in tool 9995651 between the seal and the camshaft. Pry out the seal.
Note. The purpose of the "Installing the VVT unit/timing gear pulley" section described here is to ensure that the VVT unit is correctly positioned and to reset the camshaft timing gear pulley to the correct position using the markings made at the factory. This is to ensure that the conditions are correct for any later fault-tracing.
Note. For tightening torques, see Tightening torque .
To clean the shaft journal and mating surface, use emery cloth P/N 951 1024.
Note. When cleaning work around the shaft journal, not in and out. It is essential that any residue from the emery cloth and any other contaminants are completely removed before the new sealing ring is installed.
Lubricate the surface of the seal that the camshaft rotates against. Install the camshaft seal. For camshafts with variable valve timing
Use drift 9995718 .
Use the mounting screw for the variable valve timing unit. Tighten until the drift bottoms out. for camshafts without variable valve timing
Use drift 9995719 .
Check the variable valve timing (VVT) unit. See: Variable valve timing unit, checking and adjusting .