BOMBARDIER ski-doo Tundra Scandic 2004 Series, Shop Manual

Page: 167 / 427

Section 04 ENGINE
Subsection 05 (LEAK TEST AND ENGINE DIMENSION MEASUREMENT)
04-05-6
MMR2004-114_04_05A.FM
NOTE: When checking the combustion chamber
volume, engine must be cold, piston must be free
of carbon deposit and cylinder head must be lev-
eled.
1. Remove both spark plugs and bring one piston
to Top Dead Center a using a TDC gauge.
1. Bring piston to TDC
2. Remove cylinder head.
3. Seal piston ring gap with a small amount of
grease.
4. Reinstall cylinder head.
5. Obtain a graduated burette (capacity 0-50 cc)
and fill with an equal part (50/50) of gasoline and
injection oil.
1. Graduated burette (0-50 cc)
6. Open burette valve to fill its tip. Add liquid in
burette until level reaches 0 cc.
7. Inject the burette content through the spark
plug hole until liquid touches the top of the
spark plug hole.
1. Top of spark plug hole
NOTE: The liquid level in cylinder must not drop
for a few seconds after filling. If so, there is a leak
between piston and cylinder. The recorded vol-
ume would be false.
8. Let burette stand upward for about 10 min-
utes, until liquid level is stabilized.
9. Read the burette scale to obtain the quantity
of liquid injected in the combustion chamber.
NOTE: When the combustion chamber is filled to
top of spark plug hole, it includes an amount of
2.25 cc corresponding to the spark plug well.
10. Repeat the procedure for the other cylinder.
Install a thicker or thinner cylinder/crankcase gas-
ket (refer to
Parts Catalogs ) in order to obtain the
specified combustion chamber volume.
1
F01D2IA
F00B0BA
1
ENGINE
TYPE
COMBUSTION CHAMBER VOLUME (cc)
(up to top thread of spark plug hole)
443 24.0 ± 1.0
552 34.43 ± 1.2
593 28.97 ± 1.2
F00D0HA
1