Note. There are two ways to set the valve timing.
The first procedure is used to replace the elements located on the front of the timing mechanism, while it is not necessary to remove the sprinkling parts of one or both camshaft pulleys.
Setting the valve timing
Attention! Be sure to degrease the toe and hole of the crankshaft sprocket and the bearing surfaces of the crankshaft sprocket to avoid slipping of the toothed belt on the crankshaft sprocket, which may cause 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 securely locked with the lock at top dead center Mot. 1489 (groove 5 of the crankshaft must point upwards).
Installing the belt
When replacing the timing belt, be sure to replace the timing idler and bypass rollers.
When installing the tension pulley, make sure that the lug of the pulley fits properly into groove A.
Install:
- drive belt gas distribution mechanism;
- bypass roller by tightening the sprinkling bolt with tool Mot. 1368 torque 45 Nm.
Belt tension
Move the movable pointer (A1) tension roller 7-8 mm in relation to the fixed pointer 7 using a 6 mm hex wrench (hole B).
Note. Position A corresponds to the initial position of the movable pointer.
Pre-tighten the idler axle nut to 7 Nm.
Install the crankshaft pulley so that the bolt is on the pulley and does not come into contact with it (clearance between bolt and pulley should be 2-3mm).
Note. The crankshaft pulley bolt is recyclable. if the length of the bolt to the head but exceeds 49.1 mm (otherwise replace the bolt).
Do not lubricate the new bolt with engine oil. On the contrary, a reused bolt must always be lubricated with engine oil.
Tighten the crankshaft pulley bolt to 20 Nm, then tighten 135°±16° (while the crankshaft must be locked with a top dead center lock).
Remove tool Mot. 1496 for fixing camshafts and TDC lock Mot. 1489.
Rotate the crankshaft two turns clockwise (viewed from the timing side) until turning is complete, screw in lock Mot. 1489 and the cylinder block and slowly, without jerking, move the crankshaft to the stop position on the lock.
Remove the top dead center pin.
Loosen the idler axle nut no more than one turn while holding the idler with a 6mm hex wrench.
Align the movable pointer with the fixed pointer and finally tighten the nut to 27 Nm.
Checking the tension of the timing belt
Rotate the crankshaft two turns clockwise (viewed from the timing side) until turning is complete, screw in lock Mot. 1489 into the cylinder block and slowly move the crankshaft without jerks to the stop position on the lock.
Remove the top dead center pin.
Make sure that the tension roller pointers are aligned, otherwise repeat the tensioning procedure.
Checking the installation of the valve timing
Before checking the installation of the valve timing, make sure that the tension roller pointers are in the correct position.
Screw in retainer Mot. 1469 into the cylinder block, then slowly and without jerks move the crankshaft to the stop position on the lock.
Install (without making any effort) tool Mot 1496 for fixing camshafts (the grooves of the camshafts must be in a horizontal position). If the tool can not be installed, it is necessary to re-install the valve timing and adjust the tension of the timing belt.