Removal And Installation: Removal
- Remove the cylinder head cover. Refer to
COVER(S), CYLINDER HEAD, REMOVAL AND INSTALLATION
.
- Unlock and disconnect the four Variable Valve Actuation Assembly (VVAA) wire harness connectors (1).
- Unlock and disconnect the oil temperature sensor wire harness connector (2).
- Remove the rear bolts (3a) from the VVAA (3b).
- Assemble the (special tool #10259B, Compressor, MultiAir® Spring) (2020000090), (special tool #2027207090, Tab, 90 Degree), and the (special tool #2020001090, Adapter, Multi Air Spring Compressor).CAUTION:
The coils of the springs must not be compressed and packed together, there must remain a gap between them to avoid exceeding the maximum permissible force.
- Position the tools (1) and tighten the screws to compress the springs on the VVAA.
- Remove the bolts (1a) and the VVAA module (1b).
- To avoid damage to the device housing, disconnection of the device from the piston and undesired disassembly of the hydraulic tappets while handling the UNIAIR module, do not position it with the hydraulic anchoring adjustment device (A) and clip for the hydraulic tappet rocker arm (B) in direct contact with the supporting surface. Moreover, never turn the UNIAIR module upside down with the hydraulic tappets facing upwards.
- Remove the VVAA metal gasket (1).
- If required, remove the locating dowels (2).
- If necessary, remove the multiair oil supply actuator filter. Refer to FILTER, MULTIAIR ACTUATOR OIL SUPPLY, REMOVAL AND INSTALLATION .