Bombardier SeaDoo 1997 factory shop manual, Page 67Get this manual
Section 03 ENGINE Sub-Section 05 (TOP END)
1, Cylinder Head Cover
Install cylinder head coverApply Loctite 242 (blue) below head of screws no15Apply also synthetic grease on threads of screws no15Torque cylinder head screws no15 to 12 Nm (9 lbfft) as per following illustrated sequenceRepeat the procedure, retightening all screws no15 to 24 Nm (17 lbfft)10 12
This will ensure the correct preload on the return spring no29 in order to open and close the RAVE valve at the proper RPM
Combustion Chamber Volume Measurement
The combustion chamber volume is the region in the cylinder head above the piston at Top Dead CenterIt is measured with the cylinder head installed on the engine