Cylinder Head Reassembly - Rotax 912 Series Maintenance Manual

3.12) Cylinder head reassembly

See Fig. 72-83.
Place valve spring support (1) in position on the valve guide and fit new valve
stem seal (2) on inlet side only. Push oiled intake valve (3) into the valve guide
from the outside, slide on both valve springs (outside (4) and inside (5)) or single
valve spring (17) and the valve spring retainer (6). Press the valve springs
together with the mounting device and pliers, insert the valve cotters (7) and
relieve the valve springs, see also Fig. 72-59 in 72-00-00 sec. 3.11. Carry out
the same procedure on the exhaust valve (8).
◆ NOTE:
Apply MOLYKOTE G-N to the rocker arm bore (9), the pushrod head (10) and
the valve contact area (11). Position inlet rocker arm (12) and outlet rocker arm
(13) with bushing (15, 16), depending on the specific configuration, apply
MOLYKOTE G-N to the rocker arm shafts (14) on both sides, see 00-00-00 sec.
10.3, and push into the bearing support.
◆ NOTE:
◆ NOTE:
Lubricate all movable internal parts with engine oil.
Effectivity 912/914 Series
Edition 1 / Rev. 0
BRP-Rotax
Maintenance Manual
Ensure correct positioning and equal spacing of the valve
cotters.
The rocker arm bearing support is a slide fit. Do not exert force!
Fig. 72-83 shows the configurations with single and dual valve
springs.
72-00-00
page 73
May 01/2007