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 in the illustrations is always correct.
Removal
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 camshaft seal
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.
Remove:
- the cable from the battery negative terminal.
First read: Battery, disconnecting Battery Disconnecting.
- the cross stay between the suspension turrets
- the upper timing belt cover
- the cover over the ignition coils
- the inlet hose between the air cleaner (ACL) and throttle body (TB)
- the upper and lower engine stabilizer brace
- the camshaft position (CMP) sensor housing
- the trigger wheel
- the servo reservoir and the expansion tank. Lift them up and place them on top of the engine
Warning! Ensure that no power steering fluid is spilled. Extremely flammable.
- the auxiliaries belt
- the front timing belt cover.
Position the engine according to the marking
Raise the car.
Remove:
- the right front wheel
- the nuts for the cover in the wing liner.
Install the upper timing belt cover.
Turn the crankshaft clockwise until the markings on the crankshaft and camshaft pulley correspond.
Remove the upper timing belt cover.
Removing the timing belt
Slacken off the centre screw for the belt tensioner slightly.
Hold the centre screw in place. 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
Use camshaft adjustment tool:
Install camshaft adjustment tool 999 5452 CAMSHAFT ADJUSTMENT TOOL 999 5452 Camshaft Adjustment Tool at the rear of the camshafts.
Remove:
- the plug at the front edge of the variable valve timing (VVT) unit (TORX 55).
Note! Collect any oil spillage when removing the plug using paper
- the centre screw in the variable valve timing unit (TORX 55). Carefully pull out the timing gear pulley with the variable valve timing (VVT) unit.
Replacing the camshaft seal
Carefully press in tool 999 5651 Extractor 999 5651 Extractor between the sealing ring and the camshaft.
Carefully pry out the seal.
Cleaning
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.
Oil the new seal. Install the new seal on the camshaft. Use drift 999 5718 Drift 999 5718 Drift.
Oil the new seal.
Install the new seal on the camshaft. Use drift 999 5718 Drift 999 5718 Drift.
Installation
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 front timing belt cover. Tighten
- 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 to 40 Nm.
Install:
- the trigger wheel
- the camshaft position (CMP) sensor housing
- the upper and lower engine stabilizer brace
- the inlet hose between the air cleaner (ACL) and throttle body (TB)
- the plastic nuts for the cover in wing liner
- the wheel. See Installing wheels Service and Repair
- the engine stabilizer brace. Tighten the screws at the suspension turrets and the screw for motor bracket. See Tightening torque Tightening Torque
- the cable to the battery negative terminal. First read Battery, disconnecting Battery Disconnecting.
Test drive the car to check the function of the engine.
Removing the camshaft seal
The following components must be removed when replacing the rear camshaft seal:
- the inlet hose between the air cleaner (ACL) and throttle body (TB)
- place the air cleaner (ACL) cover to one side
- the cover over the ignition coils
- the upper and lower engine stabilizer brace
- the camshaft position sensor (CMP) housing and trigger wheel.
Replacing the rear camshaft seal
Pull out the seal. Use puller 999 5919 PULLER 999 5919 Puller. Use emery cloth 951 1024 to clean the shaft journal and mating surface.
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. 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.
Installing components
Install:
- the mixer. Tighten
- the camshaft position (CMP) sensor and new cover. Tighten
- the upper and lower engine stabilizer brace
- the cover over the ignition coils
- air cleaner (ACL) cover
- the inlet hose between the air cleaner (ACL) and throttle body (TB)
Check the engine compartment. Wipe the engine compartment clean.
Checking the engine
Test drive the car to check the function of the engine.