Important Note

As of August 1985 the number of spring washers has been increased from 3 to 4.

When performing repairs, it is prohibited to increase the number of spring washers to 4 by adding a spring washer, 4 new spring washers must always be fitted.

The old version (3 spring washers) may be retained on engines up to 1985.

If, when performing repairs, 4 spring washers (2nd version) are used in place of 3 spring washers (1st version), the tightening torque should be increased to 370 - 400 Nm.