BOMBARDIER 1980 Shop Manual page 46

(
TOP END
CLEANING
Discard all gaskets.
Clean all metal components in a non-ferrous metal
cleaner.
Scrape off carbon formation from cylinder exhaust port.
cylinder head and piston dome using a wooden spatula.
O
NOTE:
The letters "AUS" (over an arrow on the
piston dome) must be visible after cleaning.
Clean the piston ring grooves with a groove cleaner tool.
or with a piece of broken ring.
DISASSEMBLY
&
ASSEMBLY
000
Place a clean cloth over crankcase to prevent
circlips from falling into crankcase. Use a pointed tool
to remove circlips from piston.
_ CAUTION: When tapping out gudgeon pins, hold
'Y
piston firmly in place to eliminate the possibilities
of transmitting shock and pressure to the connecting
rod.
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.
EXHAUST
SECTION 03
SUB-SECTION 02 (ENGINES)
Piston to cylinder wall clearance should be:
Minimum - Maximum
0.065 - 0.200
mm
(.0026") - (008")
O NOTE:
Once the circlips are installed turn each
circlip so the circlip break is not directly on piston
notch. Remove any burrs on piston caused through circlip
installation with very fine emery cloth.
Circlip break
Piston notch
@@Position cylinder head on cylinder with fins in line
with crankshaft center line. Cross torque retaining nuts
to
20
N'm (15 ft-Ibs).
@Tab washer should be replaced if bent more than three
(3) times. If in doubt replace.
'(247 ENGINE TYPE). PAGE 7