1983 Ski-Doo Shop Manual, Page 46Get this manual
SECTION 02 ENGINE SUB-SECTION 03 (377 ENGINE TYPE)
CLEANING
Discard all gaskets Clean 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 assembly, place the piston over the connecting
rod with the letters "AUS" (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 cleaningEXHAUST
Clean the piston ring grooves with groove cleaner tool, or with piece of broken ring
DISASSEMBL Y
Place clean cloth over crankcase to prevent circlips from falling into crankcase Use pointed tool to remove circlips from piston CAUTION: When tapping out gudgeon pins, hold
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 in stallation using very fine emery cloth