1997 Ski-Doo Factory Shop Manual Volume Two, Page 79Get this manual
Section 03 ENGINE Sub-Section 03 (454, 494, 583 AND 670 ENGINE TYPES)
A24C0NA
420 8769 02
A25C0CA
TYPICAL 1O-rings 2Temperature sensor hole ATorque to 29 Nm (21 lbfft)
Apply Loctite 242 (PN 413 7030 00) on cylinder screw threadsInstall and torque screws in criss-cross sequence for each cylinder to 29 Nm (21 lbfft)For 454 and 670 engines longer screws go on exhaust sideA
Torque cylinder head cover screws to 10 Nm (90 lbfin) as per following illustrated sequence4 10 8