Workshop Manual

009W2329-R01
C14
Valve guide stuffing box
In order to avoid lubricating oil consumption because of lubricating oil passing between valve
guide and valve stem causing the valves to be burnt or to be carbonized, a stuffing box has
been mounted on the upper end of the valve guides.
The stuffing box is as shown schematically on the drawing below and consists of:
A: Metal spring coat
B: Plastic bushing
C: Spring wire
The stuffing box compensates for wear and tear of the valve guides so that the lubricating oil
consumption because of leaky valve guides is reduced to a minimum.
The stuffing box cannot be repaired but has to be replaced if necessary.