BOMBARDIER 1980 Shop Manual page 35

SECTION 03
SUB-SECTION 01, (ENGINE TOLERANCES MEASUREMENT)
The difference between these two measurements should
be within specified tolerance.
RING END GAP
ENGINE RING END GAP MAXIMUM RING END
TYPE (new ring)
GAP (worn ring)
247.277
0.20 - 0.35 rnm 1.0 mm
377,444 (008 - .014") (.039")
454,464
503
354
0.15 - 0.30 mm
0.8 mm
(.006 - .012") (.031")
640
0.25 - 0.40 mm 1.2 mm
(010 - .016") (.047")
Position ring half way between transfer ports and intake
port. On rotary valve engines. position ring just below
transfer ports.
O NaTE: In order to correctly pOSition the ring in the
cylinder. use piston as a pusher.
Using a feeler gauge. check ring end gap. If gap exceeds
specified tolerance the ring should be replaced.
Transfer port
Intake port
(ENGINE TOLERANCES MEASUREMENT). PAGE 2
PISTON RING/GROOVE CLEARANCE
MINIMUM
0.04 mm
(002")
MAXIMUM
0.20 mm
(008")
Usin9 a feeler gauge check clearance between rectangu-
lar ring and 9roove. If clearance exceeds specified tole-
rance, replace piston.
,
~Y7r,",:0~:;~
f"
CRANKSHAFT DEFLECTION
Maximum: 0.10 mm (.004")
Turn crankshaft on "V" shaped blocks: using a dial
indicator measure deflection on each side as illustrated.
If deflection exceeds specified tolerance. the crankshaft
should be repaired or replaces.
' i iW
l
=.,-
~UJ'
"
.~-1
" ' , -
Measure at 6 mm (tit)
from the edge
f
Measure behind
the key