Setting the valve timing
Attention! Be sure to degrease the end of the crankshaft, the crankshaft sprocket bore, and the bearing surfaces of the crankshaft pulley. to avoid slipping of the toothed belt on the crankshaft sprocket, which can lead to engine failure.
Position the camshaft grooves using tool Mot. 799-01 as shown.
Lock tool Mot. 1496 at the ends of the camshafts.
Make sure the crankshaft is locked at top dead center and the lock is not in the balance hole (groove 5 of the crankshaft must point upwards).
Check that the inlet camshaft dephaser ring gear is securely locked (the crown should not rotate either to the left or to the right).
When replacing the timing belt, be sure to replace the timing idler and bypass rollers.
Make sure that the protrusion 1 of the tension roller correctly enters the groove 2,
Install:
- timing belt;
- bypass roller 3, tightening the fixing bolt to 45 Nm;
- crankshaft pulley, pre-tightening the bolt (do not tighten the bolt completely, the gap between the bolt.'pulley should be 2-8 mm).
Note. The crankshaft pulley bolt is recyclable. «if the length to the head does not exceed 49.1 mm (otherwise replace the bolt).
Do not lubricate the new bolt with engine oil. On the contrary, be sure to lubricate the threads and bottom surface of the head of the reused bolt with engine oil.
Note. But rotate the tension roller counterclockwise.
Align marks 6 and 7 on the idler pulley with a 6mm hex wrench inserted in hole B.
Pre-tighten the tension roller axle nut to 0.7 Nm.
Tighten the crankshaft pulley bolt to 2 Nm (while the top dead center lock Mot. 1054 must be in the corresponding hole in the crankshaft).
Mark C on the inlet camshaft dephaser gear and on the exhaust camshaft sprocket relative to the camshaft bearing cap.
Remove tool Mot. 1496 for fixing camshafts and TDC lock Mot. 1054.
Angular tighten 115°±15°of the crankshaft pulley mounting bolt while blocking the flywheel with a heavy-duty screwdriver.
Checking the tension of the timing belt
Rotate the crankshaft two turns clockwise (viewed from the timing side). Until the end of the crankshaft two revolutions (those. half a tooth before the previously applied marks are aligned), insert the top dead center clamp (at the same time, it is located between the balancing hole and the blocking hole), then bring the gas distribution mechanism to the position corresponding to the installation of the valve timing).
Remove the top dead center tool Mot. 1054.
Make sure that the tension roller marks are aligned, otherwise, repeat the adjustment of the belt tension. To do this, loosen the idler axle nut more than one turn while holding the roller with a 6 hex wrench.
Align the tension roller marks and finally tighten the nut to 28 Nm.
Checking the installation of the valve timing
Before checking the installation of the valve timing, make sure that the tension roller marks are aligned.
Install the top dead center clamp (make sure that the previously applied skeins on the toothed camshaft pulleys are aligned).
Install (without making any effort) tool Mot. 1496 for fixing camshafts (the grooves of the camshafts must be in a horizontal position and offset from the axis down). If the tool cannot be installed, reinstall the timing and adjust the timing belt tension.