BOMBARDIER ski-doo Tundra Scandic 2004 Series, Shop Manual

Page: 173 / 427

Section 04 ENGINE
Subsection 05 (LEAK TEST AND ENGINE DIMENSION MEASUREMENT)
04-05-12
MMR2004-114_04_05A.FM
CHECKING SURFACE FLATNESS
Intake manifold, intake manifold cover can be
checked for perfectly mating surfaces.
Lay part on a surface plate (marble, mirror or thick
glass plate).
Holding down one end of part, try pushing down
the other end.
If any play is felt, part must be rectified.
RECTIFYING SURFACES
Stick a fine sand paper sheet on the surface plate
then lightly oil the sand paper.
Rub part mating surface on sand paper using 8-
figure movements.
Sand until mating surface is perfectly straight.
CHECKING CRANKSHAFT
ALIGNMENT
Install a degree wheel (P/N 414 352 900) on crank-
shaft end.
Remove both spark plugs.
Install a TDC gauge (P/N 414 104 700) in spark plug
hole on MAG side.
Bring MAG piston at top dead center.
Rotate degree wheel (not crankshaft) so that 360°
mark aligns with center of crankcase. Scribe a
mark on crankcase.
Remove TDC gauge and install it on PTO side cyl-
inder.
Bring PTO piston to top dead center. Degree wheel
must rotate with crankshaft.
TYPICAL
Interval between cylinders must be 180° ± 0.5.
Any other reading indicates a misaligned (twisted)
crankshaft.
A00A1LA
0
90
80
70
60
50
40
30
20
10
180
0 A06C1TA