I had posted about a vibration issue and I think I solved it. Saturday I pulled my pipes off ( to repaint them and get them out of the way to adjust my valves). I took the nut off that holds the fan on and checked around where the fan bolts up with my inspection mirror to check for cracks in the fan but it look fine. I put the nut back on and torqued it to 40 ft lbs. I put everything back together and still had the vibration and picked up another rattling type noise that I didn't have. I found out ( I think) the vibration noise starting around 1700 rpm was the alternator strap wasn't tight enough. I actually broke the one on it tightening it up because I didn't think it was tight enough. I put a used one on it tightened it up good and the vibration seems to be gone but I have a rattling or jingling type sound coming for the alternator, fan pulley area. I reached inside the fan shroud and felt the fan and it seems tight. When it is running I can see the fan and it looks like it is running true. I know I need a new alternator pulley and I have one coming. I can't get the adjustment right on the belt. It is tight then loose when rolling the motor over by hand.
I took the belt off started it up and the noise is gone. Could the pulley be making the alternator make a noise. It is a fairly new alternator. I don't feel any bearing slack in either end. I am going to put my new pulley and belt on when it gets here and see if that helps. What gets me is it wasn't making this noise before. I may pull the fan nut off again and make sure I have everything right. I can't believe the fan would have just broke or the alternator went bad. Any suggestions. Thanks
I took the belt off started it up and the noise is gone. Could the pulley be making the alternator make a noise. It is a fairly new alternator. I don't feel any bearing slack in either end. I am going to put my new pulley and belt on when it gets here and see if that helps. What gets me is it wasn't making this noise before. I may pull the fan nut off again and make sure I have everything right. I can't believe the fan would have just broke or the alternator went bad. Any suggestions. Thanks