Camshaft Seal/Variable Valve Timing (VVT) Unit, Replacing
Camshaft seal/variable valve timing (VVT) unit, replacing
Special tools:
999 5452 CAMSHAFT ADJUSTMENT TOOL 999 5452 Camshaft Adjustment Tool
999 5651 Extractor 999 5651 Extractor
999 5719 Drift 999 5719 Drift
999 5718 Drift 999 5718 Drift
999 5474 RADIATOR PROTECTION 999 5474 Radiator Protection
999 5451 ADJUSTMENT TOOL 999 5451 Adjustment Tool
999 5919 PULLER 999 5919 Puller
999 5450 PUNCH 999 5450 Punch
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 is always correct.
Warning! 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.
Note! Crankshaft and camshafts must not be turned more than is stated in the method description!If the shafts are turned in any other way the valves may be damaged.
Preparatory work
Disconnecting the battery lead
Remove the battery lead. See Battery, disconnecting Battery Disconnecting.
Removal
Removing components
Remove:
- the screw holding the engine stabilizer brace to the bracket on the engine
- the screws holding the engine stabilizer brace to the suspension turrets
- the engine stabilizer brace
- the inlet hose for the turbocharger (TC) from the air cleaner (ACL) cover. Place it to one side
- the charge air pipe over the engine. Seal the openings
- the upper timing belt cover
- the cover over the ignition coils
- the brackets for the engine stabilizer brace on the cylinder head
- the camshaft position (CMP) sensor housing
- the trigger wheel
- the cover at the rear edge of the intake camshaft. Insert a screwdriver into the centre of the cover and then pry it off
Note! Clear up any oil spillage under the cover.
- the servo reservoir and the expansion tank. Lift up and place on top of the engine.
Warning! Ensure that no power steering fluid is spilled. Extremely flammable.
Aligning the engine according to the marking
Raise the vehicle.
Remove:
- the right front wheel
- the nuts for the cover in the wing liner.
Install the upper timing belt cover.
Turn the crankshaft clockwise. Turn until the markings on the crankshaft and camshaft pulley correspond.
Turn the crankshaft a further 1/4 of a turn clockwise, then turn back counter-clockwise until the markings correspond.
The markings are illustrated.
Remove the upper timing belt cover.
Removing the timing belt
Remove:
- the belt tensioner
- the centre screw for the belt tensioner slightly.
Hold the centre screw still. Turn the tensioner eccentric clockwise to 10 o'clock using a 6 mm Allen key.
Remove the timing belt from the camshaft pulleys.
Removing the timing gear pulley with the variable valve timing unit
Install camshaft adjustment tool 999 5452 CAMSHAFT ADJUSTMENT TOOL 999 5452 Camshaft Adjustment Tool at the rear of the camshafts. Screw the adjustment tool sections together into one.
Remove:
- the centre plugs for the variable valve timing units (Tx55)
Note! Collect any oil spillage using paper or similar.
- the centre screws for the variable valve timing units (Tx55). Pull or work off the variable valve timing units and timing gear pulleys.
Removing the front camshaft seal
Carefully press in tool 999 5651 Extractor 999 5651 Extractor between the sealing ring and the camshaft.
Carefully pry out the seal.
Installation
Note! For tightening torques, see: Tightening torque Tightening Torque.
Cleaning
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.
Use emery cloth 951 1024 to clean the shaft journal and mating surface.
Installing the front camshaft seal
Lubricate the seal using Volvo quality engine oil.
Install:
- install the new seal for the intake camshaft. Use drift 999 5719 Drift 999 5719 Drift
- the new seal for the exhaust camshaft. Use drift 999 5718 Drift 999 5718 Drift.
Checking and adjusting the variable valve timing unit
Check and adjust the variable valve timing unit. See: Variable valve timing unit, checking and adjusting, B5244T5, B5254T2 Testing and Inspection.
Installing components
Install:
- the trigger wheel. Tighten the screw
- the camshaft position (CMP) sensor housing. Tighten the screws
- the cover at the rear edge of the intake camshaft
- the engine stabilizer brace on the cylinder head. Tighten. For tightening torques, see Tightening torque Tightening Torque.
Install:
- the front timing belt cover
- the cover over the ignition coils
- the upper timing belt cover
- the auxiliaries belt
- the expansion tank
- the servo reservoir. Check that the hoses are correctly positioned
- the starter motor. Tighten the screws at the gearbox unit. See Tightening torque [1][2]Specifications
- the charge air pipe between the charge air cooler (CAC) and the throttle body (TB)
- the inlet hose for the turbocharger (TC) from the air cleaner (ACL) cover
- the charge air pipe above the engine. Remove the seals
- the engine stabilizer brace between the suspension turrets.
Finishing
Installing the battery lead
Install the battery lead. See Battery, disconnecting Battery Disconnecting.
Installing components
Install:
- the nuts for the cover in the wing liner
- the right front wheel.
Checking the engine
Test drive the car to check the function of the engine.
Preparatory work
Removing components
Remove:
- the screw holding the engine stabilizer brace to the bracket on the engine
- the screws holding the engine stabilizer brace to the suspension turrets
- the engine stabilizer brace
- the solenoid valves. Lift these away from the air cleaner (ACL) cover
- the air hose from the air cleaner (ACL) for the turbocharger (TC). Put the air hose to one side. Seal the openings
- the air cleaner (ACL) cover. Place it to one side
- the charge air pipe over the engine. Seal the openings
- the cover over the ignition coils
- the upper and lower engine stabilizer braces
- the camshaft position (CMP) sensor housing and the trigger wheel.
Removal and Installation
Replacing the rear camshaft seal
Carefully pull out the old seal. Use extractor 999 5919 PULLER 999 5919 Puller.
Lubricate the new seal using Volvo quality engine oil. Install the seal on the exhaust camshaft. Use drift 999 5450 PUNCH 999 5450 Punch.
Note! The seal is normally pressed in so that it is level with the internal bevelled edge. If the shaft journal is showing signs of wear, the seal can be pressed in 2 mm deeper by turning the drift socket.
Finishing
Note! For tightening torques, see: Tightening torque Tightening Torque.
Installing components
Install:
- the trigger wheel. Tighten the screw
- the camshaft position (CMP) sensor housing. Tighten the screws
- the engine stabilizer brace on the cylinder head
- the cover over the ignition coils
- the charge air pipe over the engine.
Remove:
- the air cleaner (ACL) cover and the intake air hose
- the solenoid valves on the air cleaner (ACL) cover
- the engine stabilizer brace. Tighten the screws
- the screw holding the engine stabilizer brace to the bracket on the engine. Tighten.
Check the engine compartment. Wipe the engine compartment clean.