1986 Ski-Doo Factory Shop Manual, Page 49Get this manual
Section 02 ENGINE Sub-section 02 (253 ENGINE TYPE)
5, Crankshaft ban bearing
Prior to installation, place bearings into and all container filled with oil heated to 100 1210 F) _This will expand bearings and ease installationInstall outer race groove outward
Torque 0 Nom 180 Ibr.inl
Refer to "Top end" section to complete the assembly
INSPECTION
The inspection of the engine bottom end must include the following measurements:
TOLERANCES MEASUREMENTS
Crankshaft deflection
Connecting rod big end axial play
FITTING NEW PARTS (MIN (MAK)
.20mm (,0078")
WEAR LIMIT
.08 mm (.0032"1
,53 mm 1.0208".1
1.0 mm L0394")