Ring End Gap; Crankshaft Deflection - BOMBARDIER ski-doo Tundra Scandic 2004 Series Shop Manual

Subsection 05 (LEAK TEST AND ENGINE DIMENSION MEASUREMENT)

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.
A01C0QA
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.
MMR2004-114_04_05A.FM
1
2
TYPICAL
1. Measure at mid point between the key and the first thread
A. 3 mm (1/8 in)
Crankshaft Deflection on PTO Side
ENGINE MAXIMUM ON PTO SIDE
TYPE
All
Crankshaft Deflection on MAG Side
MAXIMUM ON MAG SIDE
ENGINE TYPE
277, 443 and 552
593
Crankshaft Deflection in Center of
Crankshaft
ENGINE TYPE
All
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.
Section 04 ENGINE
mm (in)
0.06 (.0024)
mm (in)
0.03 (.0012)
0.05 (.0020)
MAXIMUM IN CENTER
OF CRANKSHAFT
mm (in)
0.08 (.0031)
04-05-9