Fig. 2.27. Valve components: 1 – valve cracker; 2 – upper valve spring plate; 3 – valve spring; 4 – oil deflector cap; 5 – valve guide bushing; 6 – valve
The valves are made of heat-resistant steel. Each cylinder has two intake and two exhaust valves. The intake and exhaust valves have nitrided surfaces to increase wear resistance. The valve spring has a variable outside diameter. The spring characteristics are improved by reducing the size of the upper seat. The valve guide is made of alloy to increase wear resistance. The valve seat is combined with the lower seat of the valve spring to simplify the unit and improve its maintainability (Fig. 2.27).
(Based on website data: «www.mazbook.ru»)