2001 Ski-Doo Factory Shop Manual Volume One, Page 137Get this manual
Subsection 04
Section 04 ENGINE (LEAK TEST AND ENGINE DIMENSION MEASUREMENT)
CRANKSHAFT DEFLECTION
Crankshaft deflection is measured with dial indicator
Crankshaft Deflection on PTO Side
ENGINE TYPE 377, 443 and 503 on S-Series 443 on Skandic LT 503 on Skandic WTSWT 593 MAXIMUM ON PTO SIDE mm (in) 0.06 (.0024) 0.08 (.0031) 0.06 (.0024) 0.08 (.0031)
Measuring (in engine)
First, check deflection with crankshaft in engineIf deflection exceeds the specified tolerance, recheck deflection using V-shaped blocks to determine the defective part(s)See below
Measuring (on bench)
Once engine is disassembled, check crankshaft deflection on V-shaped blocksIf deflection exceeds the specified tolerance, it can be worn bearings or bent crankshaftRemove crankshaft bearings and check deflection again on V-shaped blocks to determine the defective part(s)See measurement in following illustration