1967 Chevrolet RS Camaro
I have a 67 RS Camaro with a 350. Got new aluminum heads with roller rockers, mid-range cam, and timing chain. Also added a serpentine belt system. I noticed the belt was squealing and so I bought some belt dressing, and that makes the belt stop squealing, but then I noticed the air conditioner compressor was stopping occasionally and the belt is like bouncing on the long run side, so I tried tightening it while the motor was running. As I was tightening and could see the belt was still bouncing, the motor started knocking. Very lightly at first, but the more I tightened the belt, the louder it knocked. It was knocking enough that it was scaring me that I was about to cause something to break internally in the motor, so I backed off on the belt. The knock sounds like it is coming from the driver side of the motor, but no idea what it is or why it would be knocking when you tighten the belt. First time I've ever seen or heard anything like this. Any ideas what this could be and how I can tighten my belt without getting that knock and possibly tearing something up? All help is much appreciated.