Thanks Lynn for the technical info; I had not seen been to that website before … Racing Beat I am well aware of. Actually I bought one of their double alternator pulleys, which they claim reduces rpm by 20% … other than aluminum instead of steel it is same diameter of existing pulley. I'd like to change it anyway for the small weight gain and what-if due to belt breakage … but I can't get the nut off … any hints?
Jeff
When I read this, I thought it was about the Alternator pulley nut, since nut is in the question.
For removing the bolt from the crank pulley, the factory uses a Locktite like substance, and heat is required right on the bolt head, to destroy the Locktite. The torque would have been about 75 foot pounds, and with Locktite it can be a real pain to get out.
In the case of the engine is in service, the chance of one or both thrust bearings falling off of the spacer sleeve is good. If it does, a good deal of work will result reinstalling the bearings. Should the problem go unnoticed, and torque is applied to the bolt, one or both bearings well be destroyed. Should the engine be started, in this condition, the oil pump and more will be destroyed. So, if you must remove the bolt, Heat the bolt head if Locktite was used. (I never use it on this bolt. Never had one come loose).
Lockup up the flywheel or counterweight by placing a deep socket between the counter balance and any handy case bolt head. Put a heavy tension spring on the edge of the flywheel or flex plate. Connect the other end toward the front of the engine, to any bolt or secure location on the engine. Be sure that this spring cannot come off and injure you.
The spring will hold pressure against the rear bearing clamping it between the hardened washer, and the back side of the thrust plate. When you pull off the pulley the spacer sleeve may slide forward, but the rear bearing will stay put. If done in a car, you put a stick between the front seat and the clutch pedal. That does the same thing. The front bearing may fall off the sleeve, but you can see that from the bottom with the pan off. You can fish the bearing back on the sleeve, and reinstall the bolt while watching the bearing and counterweight. Use an impact gun to remove the bolt. Or a breaker bar.
Lynn E. Hanover
The picture shows the relationship of the pieces.