Component Description: Valves
WARNING: This page is about a different variant/trim than selected.
| Item | Description |
|---|---|
| 1 | Valve collets |
| 2 | Valve spring retainer |
| 3 | Valve springs |
| 4 | Oil shield ring |
| 5 | Inlet valve |
| 6 | Outlet valve |
| 7 | Bucket tappet - exhaust valve |
| 8 | Bucket tappet - intake valve |
There are four valves per cylinder in the cylinder head. Two intake and two exhaust valves, where the intake valves have a larger diameter at the valve spring retainer.
The intake valves are made of one material and are solid .
The exhaust valves are designed as hollow valves . The cavity is filled with sodium . The sodium melts at about 97 °C and has good thermal conductivity. The temperature at the valve spring retainer can thus be reduced by about 100 °C.
The valves are operated by mechanical bucket tappets.
NOTE:
Throughout the whole service life of the engine, during the service intervals the valve clearances do not
need to be checked or even set. This is only necessary if the camshafts have been removed during repair work. The instructions in the procedure must be observed for the exact adjustment.