BOMBARDIER ski-doo Tundra Scandic 2004 Series, Shop Manual

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Section 04 ENGINE
Subsection 05 (LEAK TEST AND ENGINE DIMENSION MEASUREMENT)
MMR2004-114_04_05A.FM
04-05-9
RING END GAP
Position ring half-way between transfer port and
intake port.
NOTE: In order to correctly position the ring in the
cylinder, use piston as a pusher.
Using a feeler gauge, check ring end gap. Replace
ring if gap exceeds specified tolerance. Refer to
TECHNICAL DATA.
1. Transfer port
2. Intake port
CRANKSHAFT DEFLECTION
Crankshaft deflection is measured with a dial indi-
cator.
Measuring (in engine)
First, check deflection with crankshaft in engine.
If deflection exceeds the specified tolerance, re-
check deflection using V-shaped blocks to deter-
mine the defective part(s). See below.
Measuring (on bench)
Once engine is disassembled, check crankshaft
deflection on V-shaped blocks. If deflection ex-
ceeds the specified tolerance, it can be worn bear-
ings or a bent crankshaft. Remove crankshaft bear-
ings and check deflection again on V-shaped blocks
to determine the defective part(s). See measure-
ment A in following illustration.
TYPICAL
1. Measure at mid point between the key and the first thread
A. 3 mm (1/8 in)
Crankshaft Deflection on PTO Side
Crankshaft Deflection on MAG Side
Crankshaft Deflection in Center of
Crankshaft
NOTE: Crankshaft deflection cannot be correctly
measured between centers of a lathe.
If the deflection exceeds the specified tolerance,
crankshaft should be repaired or replaced.
A01C0QA
2
1
ENGINE
TYPE
MAXIMUM ON PTO SIDE
mm (in)
All 0.06 (.0024)
ENGINE TYPE
MAXIMUM ON MAG SIDE
mm (in)
277, 443 and 552 0.03 (.0012)
593 0.05 (.0020)
ENGINE TYPE
MAXIMUM IN CENTER
OF CRANKSHAFT
mm (in)
All 0.08 (.0031)
A01C0RD
1
A