Tightening torque of nuts on the four anchor bolts and of the two cylinder head retaining nuts:
check every 7500km (5000 miles); remove the cap nut (13 mm wrench) and the two side nuts (10 mm wrench, see arrows) and take off the rocker cover.
Take up slack at the cylinder head nuts with a torque wrench in the order shown in the diagram. The
engine must be stopped and cold.
Tightening torque: 35 + 4 Nm (26 + 3 lb. ft) Fig. 74
Check valve clearances: this is essential each time the anchor bolt and cylinder head nuts are tightened. The engine must be stopped and cold. Insert a feeler gauge between the valve stem and the rocker. The spark plugs must be taken out and the engine turned at the rotor retaining bolt on the alternator with a 6 mm Allen key until the cylinder
on which the valve clearances are to be adjusted is at top dead center on the compression stroke. Both valves will then be closed. Slacken the locknut (12 mm wrench) and turn the adjusting screw (12 mm wrench) as necessary. Valve clearances: inlet 0.1 0.mm (0.004 in), exhaust 0.15 mm (0.006 in). For the first 1 000 km (app. 600 miles): inlet 0.15 mm (0 006 in), exhaust 0.20 mm (0.008 in). Tighten the locknut and check that the valve clearance has not altered. Fig. 75