Wierd Noise

[19aD6Gn]

I own a 86 gn and I just got done restoring it. I have replace just about every bolt on under the hood, and it makes a wierd humming/knocking noise when i reve in up with the ac on. I sounds like a bolt is loose but i check them all, and it still does it. Oh and it only does it when the ac is on, but i have everything for that. Please let me know if you know what to do. Thank you.

 

[DailyDrifter]

Could be the compressor going out. Check the bolts on the accesssory bracket, I had a stripped PS bolt that was loose .

 

[mikestertwo]

Check you belt tensioner.

 

[bmackinnon]

Check you belt tensioner.

yup.... sounds like the tensioner...