Ventiler indstilling



Store modeller 
Små modeller
Tappet clearance (fig. 2)  

Every 3000 km (2000 miles) or any time valve operation is too noisy, tappet clearance should be checked. This adjustment is made on a cold engine with the piston at TDC exactly at the end of its compression stroke. After removing the cylinder head cover, operate as follows:
  1. slacken nut 'A';
  2. screw in or out the adjuster screw 'B' until the following clearances are obtained:
    - inlet valve mm 0,22 (750, 850, 1000) and mm 0,15 (V35, V50, V65).
    - exhaust valve mm 0,22 (750, 850, 1000) and mm 0,20 (V35, V50, V65).
    Use a feeler gauge 'C' to check this clearance. When this is excessive, there will be noisy valve operation: if it is less, the valves may not close fully causing inconveniences such as:
    - compression loss;
    - engine overheating, etc.
On a new engine, this adjustment must be made after the first 500 km (300 miles).