Tightening cylinder heads Checking/adjusting valve clearances (Inspection I) (Inspections I, II and III) • Remove cylinder head cover. e Caution: Catch escaping oil. • Check valve clearance with feeler gauge and, if necessary, correct with adjusting screw. Valve clearances with engine cold (max. 35 ° C/95 ° F): Inlet........................................... 0.15 mm (0.006 in) Exhaust..................................... 0.30 mm (0.012 in) X Tightening torque: Locknut.......................................................... 8 Nm • Recheck valve clearances after adjusting. Feeler gauge must pull through between valve stem and adjusting screw with slight resistance.
• Assembly is the reverse of the disassembly pro- cedure. e Caution: Make sure that all seals are correctly seated. Seals and sealing faces must be free from oil and grease. X Tightening torque: Cylinder head cover ....................................... 8 Nm R21000370 • Select a gear and turn the rear wheel, or set the piston to TDC on the ignition stroke by turning the belt pulley. Top dead centre on ignition stroke: • The TDC mark is visible and the inlet and exhaust valves in the cylinder concerned are closed. • Tighten cylinder head nuts. Tightening procedure after 1,000 km (600 miles) 1. Tighten the cylinder head nuts one after the other diagonally opposite sequence 1.1.
Slacken off one nut at a time 1.2. Tighten nut to initial torque.................... 20 Nm 1.3. Tighten nut to specified wrench angle...... 180 ° 2. Slacken and retighten M 10 screw ........ 40 Nm 00.37 R2100033 R2100033 0 R210003 R210003