5) Valves - Rotax 912 Series Maintenance Manual

3.11.5) Valves

5
Effectivity 912/914 Series
Edition 1 / Rev. 0
BRP-Rotax
Maintenance Manual
See Figs. 72-67, 72-68, 72-69 and 72-70.
Intake valves are checked as follows:
Carry out a visual inspection of the valves for damage and wear.
Clean valves, measure valve stem diameter and check valve disk for
wear.
The valve stem diameter VT01 is measured at the edge of the moving
path (1) of the valve stem. See Fig. 72-67.
See 72-00-00 sec. 4.
Check valve front surface (5) for pitting.
Check valve stem for possible deposits. Heavy oil carbon residues (2)
on the valve stem indicate increased wear on the valve guide.
Fig. 72-67
3 mm
(0.12 in.)
3
1
3 mm
2
07443
max 20%
(0.12 in.)
72-00-00
page 64
May 01/2007