1982 Ski-Doo Shop Manual, Page 46Get this manual
SECTION 02 ENGINE SUB-SECTION 03 (377 ENGINE TYPE)
CLEANING
Discard all gasketsClean all metal components in non-ferrous metal cleanerScrape off carbon formation from cylinder exhaust port, cylinder head and piston dome using wooden spatula
ASSEMBLY
At assemblyplace the pi.ston over the connecting rod with the letters" AU S" (over an arrow on the piston dome) facing in direction of the exhaust port
NOTE: The letters "AUS" (over an arrow on the piston dome) must be visible after cleaning EXHAUST
Clean the piston ring grooves with groove cleaner tool, or with piece of broken ring
DISASSEMBLY
Place clean cloth over crankcase to prevent circlips from falling into crankcaseUse pointed tool to remove circlips from piston CAUTIONWhen tapping out gudgeon pins, holdpiston firmly in place to eliminate the possibilities of transmitting shock and pressure to the connecting rod To minimize the effect of acceleration forces on circlip, install each circlip so the circlip break is at o'clock as illustratedRemove any burrs on piston caused through circlip installation using very fine emery cloth