S80 T6 L6-2.8L Turbo VIN 90 B6284T (1999)

Variable Valve Timing Actuator: Service and Repair
Camshaft Seal/Variable Valve Timing (VVT) Unit, Replacing
Camshaft seal/variable valve timing (VVT) unit, replacing
Special tools:
999 5452 CAMSHAFT ADJUSTMENT TOOL See: Tools and Equipment/999 5452 Camshaft Adjustment Tool
999 5651 Extractor See: Tools and Equipment/999 5651 Extractor
999 5718 Drift See: Tools and Equipment/999 5718 Drift
999 5719 Drift See: Tools and Equipment/999 5719 Drift
999 5451 ADJUSTMENT TOOL See: Tools and Equipment/999 5451 Adjustment Tool
999 5919 PULLER See: Tools and Equipment/999 5919 Puller
999 5450 PUNCH See: Tools and Equipment/999 5450 Punch
999 5750 Compression tool See: Tools and Equipment/999 5750 Compression Tool
Removing the front camshaft seal
Note! As the illustrations in this service information are used for different model years and / or models, some variation may occur. However,
the essential information in the illustrations is always correct.
Removing the rear camshaft seal
See Removing/Installing the rear camshaft seal.
Preparation
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.
Removing the front camshaft seal / variable valve timing unit
Caution! Interrupt the current: Disconnect the battery negative lead. First read Battery, disconnecting See: Starting and
Charging/Battery/Service and Repair/Procedures/Battery, Disconnecting.
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Remove the timing belt from the timing gear pulley for the camshafts. See Replacing the timing belt See: Timing Components/Timing Belt/Service
and Repair/Removal and Replacement
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Check the tensioner and idler pulleys. See Replacing the timing belt See: Timing Components/Timing Belt/Service and Repair/Removal and
Replacement
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Remove the camshaft position (CMP) sensor housing and the trigger wheel
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Remove the cover at the rear edge of the camshaft.
Removing the variable valve timing unit / timing gear pulley
Install adjustment tool 999 5452 CAMSHAFT ADJUSTMENT TOOL See: Tools and Equipment/999 5452 Camshaft Adjustment Tool 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 centre 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 and the timing gear pulley.