[QUOTE]Every 10.000 Km and also in case of abnormal knocking in the valve mechanism, check clearances A (Fig. 29) between the cams and valve rockers which should be 0.15 mm on a cold engine both for the intake and exhaust valves. On a new engine perform this operation after the first 2,000-3,000 Km upon checking and tightening the fasteners of the cylinder head, camshaft bearing housing and intake and exhaust manifolds.
Loosen the cylinder head bolts preliminarily through about 30" each and then tighten them according to the sequence shown in fig. 30.
Figure 30 - Sequence of tightening cylinder head bolts
Fig 31. Sequence of tightening camshaft bearing housing nuts
Tighten bolts 1 through 10 to a torque of 115 N·m (11.5 kg · m), and bolt 11 to a torque of 38 N·m (3.8 kg · m).
Tighten the nuts of the camshaft bearing housing by applying a torque of 22 N·m (2.2 kg m) according to the sequence shown in pig. 31.
To adjust the valve clearances, proceed as follows:
Fig 32.
Setting No. 4 Cylinder piston in TDC
Fig 33. Adjusting valve clearances: 1- adjusting bolt, 2- adjusting bolt locknut
* Remove the cylinder head cover with its gasket; if necessary, first remove the heater air intake box;
* Rotate the crankshaft clockwise to align mark A (Fig. 32) on the sprocket with mark B on the camshaft housing; in this case the piston of the No. 4 cylinder will be on TDC at the end of the compression stroke, and both valves will be closed
* Adjust the rocker-to-cam clearances of the exhaust valve on the No. 4 cylinder (8th cam) and of the intake valve on the No. 3 cylinder (6th cam); for this purpose, loosen locknut 2 (Fig. 33) and rotate adjusting bolt 1 to set the required clearance, using a flat feeler gauge inserted between the cam and the rocker (the feeler gauge should move in this case with a slight biting)
* Holding bolt 1 in this position with a wrench, tighten locknut 2 by applying a torque of 52 N·m (5.2 kg · m) and recheck the clearance
* Turning the crankshaft each time through hall a revolution, adjust the clearances of other valves, following the sequence given in Table 3 below.
Table 3 - Sequence of Valve Clearance Adjustment.
Crankshaft No of cylinder in which piston is on TDC Valves under adjustment
angle at end of compression stroke exhaust intake
degrees Cylinder No. Cam No. Cylinder No. Cam No.
0 4 4 8 3 6
180 2 2 4 4 7
360 1 1 1 2 3
560 3 3 5 1 2
* Reinstall the cylinder head cover with its gasket. Adjustment over, check the tightening torque of the crankshaft jaws, which should be 122 N·m (12.2 kg · m).
Tensioning the Valve Gear Chain
Every 10.000 Km, adjust the tension of timing chain 2 (Fig. 34). Do it on a new car after the first 2,000- 3,000 Km. For this purpose, loosen retaining nut 7 and turn the crank- shaft through 1-1~5 revolutions in the direction of its normal rotation. In this case spring 10 actuates shoe 6 through plunger 11 and automatically sets the required chain tension. Adjustment over, tighten nut 7.
Adjust chain tension also in case of excessive operation noise in the valve gear. [/QUOTE]
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