Attention! During work, do not allow the motor shaft to rotate in the opposite direction (counterclock-wise).
Adjusting the valve timing of the engine camshafts must be carried out in the following order. Prepare fixtures «00.9.250», «11.2.300», «11.3.240», «11.3.244», «11.3.292», «11.4.220» And «11.6.150». Set the crankshaft to the TDC position for the end of the compression stroke of the first cylinder. In this case, the tops of the camshaft cams must face each other (dash dotted lines, see fig. 3.106).
Block the crankshaft with a tool «11.2.300» (see fig. 3.122), which must be removed before the motor shaft rotates or is started.
Unscrew the mounting pins (arrows, see fig. 3.121) and remove the Q-VANOS adjustment unit.
Release the top tensioner (14, see fig. 3.15) secondary chain down and block it with the tool «11.3.292».
1, 16 - nut (M6); 2.23 - pulse sensor wheel; 3 - disc spring; 4 - thrust disk; 5.18 splined shaft; 6 - bolt T (M6x20); 7.13, 20 - asterisk; 8 - bolt T (М7х18); 9 - bolt (M6x40); 10 - bolt (M6x16); 11 - toothed sleeve; 12.21 - pin; 14 - tensioner; 15 - bolt (М6х55); 17 - washer; 19 - guide; 22 - thrust disc
unscrew the cylinder (1, see fig. 3.123) and remove the timing chain tensioner plunger cylinder, while taking into account that the piston cylinder is under significant spring pressure (3).
1 - cylinder; 2 - sealing ring; 3 - spring; 4 - plunger
Insert fixture «11.4.220» (see fig. 3.117) and install the adjusting screw in tight to the tensioner bar.
Loosen the bolts (3 pcs, 8, see pic. 3.15) half a turn. loosen the nuts (1, 3 pcs.) two turns, and the nuts (16, 3 pieces, 3) for one turn.
Attention! splined shaft (5, 18) slips very easily on the gearing.
Carefully pull out the splined shaft (18) intake camshaft until approximately 1 mm of the ring gear is visible from the outside. Carefully pull out the splined shaft (5, see fig. 3.15) exhaust camshaft until it stops.
Install fixture «11.3.244» on adaptation «11.3.240» and fix them with a bolt screwed into the threaded hole of the spark plug (see fig. 3.109).
Press the upper secondary chain tensioner down and remove the tool «11.3.292».
Pretension the tensioner bar using the tool «11.4.220», screwing the adjusting bolt with a tool «00.9.250» (see fig. 3.117) or a conventional torque wrench, applying a torque of 0.7 Nm (0.07 kgf·m).
press the wheel (2, see fig. 3.15) camshaft position sensor, create a slight tension of the Belleville spring (3) and tighten nuts (1, 3 pcs.) only by hand.
Remove the seal, clean and degrease the sealing surface of the end face of the cylinder head. Check centering sleeves (2 and 7, see fig. 3.4) for damage and correct installation.
1 - cylinder head; 2.7 - centering sleeve; 3.8 - screw plug (M8x1); 4 - cover (∅28); 5 - hairpin (M6x30); 6 - hairpin (M6x60); 9 - hairpin (M6x28); 10 - bolt (M8x28); 11 - harness holder; 12 - spacer; 13 - sealant; 14.30 - cover; 15 - self-blocking nut; 16 - nut (M7); 17 - hairpin (М7x95); 18, 20 - center, sleeve (∅9,5); 19 - support bar; 21 - bolt T (M6x50); 22 - bolt T (M6x70); 23 - bolt 7 (M6x100); 24 - screw plug with sealing ring (М12x1.5x26); 25 - bolt; 26.35 - sealing ring; 27 - hairpin (М7x39); 28 - hairpin (M7/6x29.5); 29 - screw plug (M18x1.5); 31 - guide sleeve; 32 - head bolt (M10x110); 33 - gasket washer; 34 - cover (∅22); 36 - screw plug (M10x1.0); 37 - cover (∅18); 38 - hairpin (M7x55); 39 - sensor; 40 - saddle issue. valve; 41 - saddle vp. valve; 42 - hairpin (M6x25); 43 - sealing gasket; 44 - check valve
Install fixture «11.6.150» (see fig. 3.118) only on a clean surface and tighten the nuts (arrows) by hand.
Tighten the fastening nuts evenly so that the tool fits snugly over the entire surface of the cylinder head. Screw in the bolts (8, 3 pieces, see fig. 3.15) on the outlet side and tighten them to 5.0 Nm (0.5 kgf·m) up to a fee.
Tighten the nuts (1, 3 pcs.) on the outlet side and nuts (16, 3 pcs.) on the intake side and tighten them to 5.0 Nm (0.5 kgf·m) to a tight fit. Tighten the bolts (8, 3 pcs.) on the exhaust side, initially with a torque of 5.0 Nm (0.05 kgf·m), and then tighten with a torque of 20 Nm (2.0 kgf·m). Tighten the nuts (1, 3 pcs.) on the outlet side and nuts (16, 3 pcs.) on the intake side torque 10 Nm (1.0 kgf·m).
Pull back fixture «11.2.300» back enough to free (unlock) flywheel. Remove fixtures «11.3.244» And «11.3.240» (see fig. 3.109).
Rotate the crankshaft two full turns clockwise (720°) and check the position of the tops of the camshafts of the first cylinder (dash-dotted line, see fig. 3.106), they should face each other.
Install fixture «11.2.300» (pic. 3.122), to lock the flywheel to TDC on the first cylinder at the end of the compression stroke.
Attention! Do not turn the engine in the opposite direction. Remove the tool before cranking and starting the engine «11.2.300».
Install fixture «11.3.240» on camshafts (see fig. 3.119).
Despite the correct adjustment of the camshafts, the tool «11.3.240» (arrows) may protrude up to 1 mm in relation to the intake side due to the manufacturing tolerances of the D-VANOS system components and the gap in the gearing. fixture «11.3.240» must not protrude from the exhaust side, while the valve timing must be readjusted.
Release chain tension and remove tool «11.4.220» (see fig. 3.117).
Install the chain tensioner plunger cylinder (see fig. 3.123).
1 - cylinder; 2 - sealing ring; 3 - spring; 4 - plunger
Remove tool «11.2.300» (see fig. 3.122), to unlock the flywheel.
Remove tool «11.6.150» (see fig. 3.118).
Reinstall the D-VANOS adjustment unit. Install previously removed elements in the engine compartment. Check and restore coolant and oil levels. Start the engine and check the tightness of the connections, oil and coolant levels, make a test drive.