1989 Ski-Doo Repair Manual, Page 86Get this manual
Section 02 ENGINE SUb-section 03 (377 ENGINE TYPE)
NOTE: The following procedures can be done without removing the engine from chassis
Use belt tension tester (P IN 4143482 00) to check deflection
CLEANING
Clean all metal components in non-ferrous metal cleaner
DISASSEMBLYASSEMBLY
21, Fan nut
To remove or install fan pulley retaining nut, lock fan pulley with special holder wrench (PIN 4208763 57)At assembly, torque nut to 65 N.m (48 Ibf.ft)AOOO 002 007