crank pulley issue

[beat90tsi]

Due to some squeaking and such I inspected and discovered a faulty crank pulley. I bought the new one, and borrowed the proper tools to remove my old one. However, the impact gun is not moving the center bolt at all. I had the line pressure at 100psi, (started at 80 and increased) I was using a snap-on gun. Should I proceed with caution at this point, or just use more pressure and possibly a better gun?
Thanks,
Jon

 

[NDgsx]

No need to remove the center bolt to replace the pulley, just the 4 12mm ones.

 

[beat90tsi]

hmmm....i was not aware of that....

what does the center bolt do?

*edit
more importantly, how do I get that bi*** off, just keep beating on it?

 

[halligoo]

This might sound stupid, but check that the torque on your impact wrench is turned up. I had the same problem and felt pretty stupid when my buddy cranked up the torque and started laughing at me.

 

[RamenPride]

what does the center bolt do?

holds the sprocket to the crankshaft.

 

[beat90tsi]

The gun was on the highest setting, that bolt is just in there, probably with lock-tite. I got the pulley off with the outside 4 bolts, took some whacking with the hammer, but it came off and the new one is on, much better, no more awful noises from the T-belt side of the motor.

 

[NDgsx]

Settings on an impact gun only affect torque when turning clockwise. Turning counter clockwise they are always at full output.