What am I missing...???  

Trying to remove the Harmonic Balancer off my Oldsmobile 403 V8...

The manual says the mounting bolt should have been torqued to 310 Ft-Lbs...

I have laid into it with well over 400 and nothing....

This thing is not "left hand" threaded is it..???

I have sprayed the "area" with penetrating fluid...

Whats next, a bigger cheater pipe..??  how about a torch on the bolt head...???  then catch it after it cools...???

I don't want to shear the bolt off...!!!

Help..!!!

white_trash is not crazy that works I done it also. Sometimes by accident  . But you may not be that far off with the old hot wrench idea. I have had to heat a harmonic balance bolt before to break it loose. Just make sure you let the bolt cool, and if the dampner is a fluid dampner that might not be a good idea unless u have a replacement. And snap-on has a 1 inch impact thats got about 1200 ft-lbs of stank. but there a liitle price. keep us informed

I have also found somtimes tapping the bolt head with a hammer to loosen things up.. :.order: