Remove the top part of the toothed belt guard (see earlier in this chapter).
Set the crankshaft to the TDC position of the ignition moment of the first cylinder (see also earlier in this chapter).
Remove toothed pulley. When loosening the bolt, hold the gear with a traverse (e.g. traverse 3036). When working with a 6-cylinder engine, loosen the toothed belt gear with a puller (cm. «Toothed belt replacement»).
Remove the cylinder head cover.
Loosen toothed belt (cm. «Toothed belt tension») and remove from the camshaft sprocket.
Remove the additional vacuum pump for the brake booster from the cylinder head (only 5-cylinder engine).
On a 6-cylinder engine, unscrew the Hall sender housing on the left cylinder head.
Left: The figure shows how to fit the special tool 3243 on a 6-cylinder engine to lock the camshafts in the TDC position.
Right: The illustration shows tool 3242 and where it should be screwed into the crankcase to secure the crankshaft.
Removing the camshaft timing belt gear with the locking bolt loosened using a clawed puller.
4- and 5-cylinder engines: first unscrew bearing caps 1 and 3 in a crosswise sequence (looking from the front), then bearing caps 2 and 4.
6-cylinder engine: first unscrew bearing caps 2 and 3 in a cross pattern (looking from the front), then 1 and 4.
Pay attention to the following when installing:
4- and 5-cylinder engines: Install the camshaft so that the cams at the first cylinder point evenly upwards.
6-cylinder engine: Install the camshaft so that the locking plate is directed with its large hole towards the opposite cylinder head.
All types of motors: Bearing cover hole not in the middle: pay attention when installing.
Install the camshaft bearing cap on the corresponding bearing according to the marking.
4- and 5-cylinder engines: Tighten first bearing caps 2 and 4 in a diagonal sequence, then bearing caps 1 and 3. Tightening torque: 20 Nm.
6-cylinder engine: Tighten first bearing caps 1 and 4 crosswise in turn, then bearing caps 2 and 3. Tightening torque: 20 Nm.
4- and 5-cylinder engines: Tighten the camshaft sprocket (if removed) torque 65 Nm. Installation Position: Wedge on camshaft matches groove in toothed pulley bore.
6-cylinder engine: Install camshaft gear with locking plate, tighten to 70 Nm.
All types of engines: be sure to check the valve timing (see above).
After installing the camshaft, do not start the engine for 30 minutes so that the hydraulic tappets can take the desired position.
Turn the engine over by hand first.
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