Variable Valve Timing Unit, Checking And Adjusting: Notes

Special tools: 

See 9995451

See 9995452

Installing and adjusting the variable valve timing unit/timing gear pulley on the camshaft 

Installing the crankshaft adjustment tool 

Fig 1: Identifying Starter Motor

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Remove the starter motor mounting screws. Pull out the starter motor and put it aside. Remove the plug of the gauge hole. Rotate the crankshaft slightly clockwise. Install: 9995451 . Make sure that it bottoms against the engine block.

Aligning the crankshaft 

Fig 2: Identifying Crankshaft Timing Gear Pulley & Oil Pump Alignment Marks

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Turn the crankshaft counterclockwise to its stop against the crankshaft adjustment tool. Check that the marking on the crankshaft timing gear pulley aligns with the marking on the oil pump.

Installing the variable valve timing unit on the camshaft 

Fig 3: Identifying Screws For Variable Valve Timing Unit And Timing Gear Pulley

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Press the variable valve timing unit/timing gear pulley onto the camshaft. Install the center screw (1) that holds the variable valve timing unit to the camshaft. Do not tighten yet  .

Slacken off, but do not remove the screws (2) which secure the timing gear pulley to the variable valve timing unit.

Position the upper timing cover.

Fig 4: Identifying Timing Gear Pulley Aligned To One Tooth Before Marking On Upper Timing Cover

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Turn the timing gear pulley so that the screws at the oval holes are in the limit position. Continue turning clockwise until the timing gear pulley's marking is 1 tooth before the marking on the upper timing cover.

Fig 5: Identifying Screws For Variable Valve Timing Unit And Timing Gear Pulley

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Check that the timing gear pulley is still in the limit position  in the oval holes.

Tighten the center screw (1)  in the VVT unit to 120 Nm  .

Check that the variable valve timing unit does not rotate when tightening. Install the center plug and tighten to 35 Nm  .

Install the belt pulley on the intake camshaft  : Install the belt pulley on the intake camshaft with three screws; do not tighten yet  .

Fig 6: Aligning Marking On Timing Gear Pulley With Marking On Upper Timing Cover

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Turn the timing gear pulley to the marking. Check that the markings on the timing gear pulley/intake camshaft and upper timing cover correspond.

Installing the timing belt 

Install the belt in the following order: 

1. the belt pulley on the crankshaft
2. the idler pulley
3. cam wheel, intake camshaft
4. water pump
5. belt tensioner.

Fig 7: Identifying Variable Valve Timing Unit Turned Clockwise To Stop

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Turn the variable valve timing unit clockwise to the stop.

Check that the markings on the belt pulley and the upper timing cover align.

Install the timing belt (continued) 

Fig 8: Identifying Timing Belt Routing

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Fit the timing belt over the exhaust camshaft's cam wheel.

Special tools: 

See 9995451

See 9995452