1978 Ski-Doo Shop Manual, Page 201Get this manual
SECTION 04 SUB-SECTION 02, (ENGINES)
ROTARY VALVEWATER PUMP
CLEANING
Discard all oil seals and "0" ringsfiemove old crankcase sealant from rotary valve gear, adjacent bearing and cap mating surfaceClean all metal components in non-ferrous metal cleanerUsing angle finder, mark crankcase at 1400 from bottom edge of magneto side inlet port1978444 type: 1400 BTDC opening 51 ATDC closing
DISASSEMBLYASSEMBLY
0Torque to 20 Nm (15 tt-lbs)0Apply Loctite Lock'n Seal 242 on threads(?)At assembly, apply crankcase sealant (l.octite 515) on bearing and rotary valve gear mating surfacesMARK HERE