something behind the pully.

[Jeff65]

Thread lockers are relatively modern adhesive products. All late model engines now use thread locker somewhere in their assembly. Older engines may or may not use them. It depends on whether or not the engine has been rebuilt before. If not previously rebuilt and older than 1980, I'd guess no thread locker is used. If rebuilt later than 1980, chances are thread locker was used. The main thing is to know that it could've been used. Apply torque equal to setting torque and if the bolt does not turn then apply heat and try again. Example: lets say the flywheel bolt torque is 120 ft-lbs. Use a torque wrench and attempt to remove with 120 ft-lbs torque. If it gives, no problem but if it doesn't then heat modestly and try again. Repeat procedure until bolt breaks loose. Heat with wide flame and constant motion to uniformly warm the component. It does not have to be red hot, only warmed. Heat plus torque will break the bolt/thread locker loose.