The clearance must be checked using a tool (pic. 3.7). The maximum allowable clearance during operation between the valve stem and the guide sleeve is measured by the maximum displacement of the valve head, when the valve stem is flush with the upper edge of the guide, and should not exceed 0.5 mm.
Checking for valve guide wear is especially important for engines with long end-of-life (mileage).
- The total length of the sleeve is 43.5 mm;
- Sleeve inner diameter, mm:
- nominal 6.0;
- 1st rem. size 6.1;
- 2nd rem. size 6.2;
- Tolerance from 0.0 to +0.015.