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Home >> Volvo >> 2000 >> S40 L4-1.9L Turbo VIN 25 B4204T2 >> Repair and Diagnosis >> Engine, Cooling and Exhaust >> Engine >> Timing Components >> Variable Valve Timing >> Variable Valve Timing Actuator >> Adjustments >> Adjusting Or Replacing Variable Valve Timing Unit

Adjusting Or Replacing Variable Valve Timing Unit






VVT-unit, replacing/adjusting

Special tools:
999 5452 CAMSHAFT ADJUSTMENT TOOL 999 5452 Camshaft Adjustment Tool
999 5199 COUNTERHOLD 999 5199 Counterhold

Note! Since 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.

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.

Preparations
Prepare the car according to Camshaft seals, replacing Camshaft Seals, Replacing.

Removing the variable valve timing (VVT) unit




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).
- the center screw in the variable valve timing unit (TORX 55).
Carefully pull out the timing gear pulley with the variable valve timing (VVT) unit. A small amount of oil may run out. Place paper underneath.

Removing the timing gear pulley





Remove:
- timing belt pulley's screws. Use counterhold 999 5199 COUNTERHOLD 999 5199 Counterhold.
- the timing gear pulley
- tool 999 5452 CAMSHAFT ADJUSTMENT TOOL 999 5452 Camshaft Adjustment Tool.
- the screw holding the inner timing cover to the cylinder head.
Timing belt pulley without VVT-unit: -Remove -Remove timing belt pulley. -Remove 999 5452. -Remove

Secure the crankshaft position
Install the adjustment tool.

Remove:
- front air baffle.
- the support between the cylinder block and the intake manifold.
- the starter motor mounting screws.
Place the starter motor to one side.
Remove the blind cover plug and the sealing washer.
Turn the crankshaft clockwise slightly to avoid the adjustment tool being in the wrong position.




Install gauge 999 5451 ADJUSTMENT TOOL 999 5451 Adjustment Tool. Make sure that the gauge bottoms against the engine block.
Turn the crankshaft back counter-clockwise until it stops against the drift.




Check that the marking on the crankshaft timing gear pulley corresponds with the marking on the oil pump.

Installing VVT-unit




Install the timing gear pulley using the centre screw on the camshaft.
Ensure that the markings on the timing gear pulleys/upper timing cover correspond. Do not tighten.

Installing the timing gear pulley





Install:
- the upper timing cover.
- timing belt pulley without VVT on the camshaft. Use two screws positioned so that the markings on the timing belt gears/upper timing gear cover match. Do not tighten.

Installing the timing belt




Install the timing belt on the timing gear pulleys.

Note! Adjust so that the screws in the timing gear pulley without variable valve timing do not reach the limit position in the oval holes.

Tension the timing belt





Note! This adjustment is to be made with a cold engine. Suitable temperature is approximately 20°C/67°F.At a higher temperature, for example with a warm engine or a higher ambient temperature, the needle is further to the right.

The image shows the indicator position at different engine temperatures.




- The belt shall be tight between the inlet camshaft gear, idler gear, and crankshaft.
- Fix the belt tensioner centre screw in position and turn the belt tensioner eccentric counter clockwise until the tensioner indicator passes the marked position.
Then turn the eccentric back so that the indicator reaches the marked position in the centre of the window.
- Hold the eccentric secure and tighten the centre screw. Torque tighten to 20 Nm.

VVT unit / timing gear pulley, tightening




Tighten the centre screw on the timing gear pulley with VVT. Tighten to 90 Nm.
Install the plug. Tighten to 35 Nm.
Install the third screw on the timing belt pulley without VVT. Tighten with 20 Nm.
Remove the adjustment tools.

Check




- Press the belt to check that the indicator on the tensioner moves easily.
- Position the upper timing cover.
- Turn the crankshaft two turns. Check that the markings on the crankshaft and camshaft pulley correspond

Note! Check that the indicator on the belt tensioner is within the marked area.

- Remove the upper timing cover.

Finishing
Reset the car. See Camshaft seals, replacing Camshaft Seals, Replacing.

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