On1wheel

was making a squealing noise and sounds like it's coming from the harmonic balancer. I installed a new one and belts, same sound. Only happens at idle. Pulley looks like its wobbling. Any ideas?

DumpdEJ6

Is the keyway and key on the crank ok? Fitting tightly?

On1wheel

Key felt alright. One thing I want sure about is when both pulleys are on shaft there is play, kind of like teeth are worn out.

holmesnmanny

pull the harmonic pulley and inspect it, could be about to come apart

On1wheel

Brand new pulley

holmesnmanny

on any belt, on the longest side of the belt, in the middle of that side, with your thumb and index finger, twist the belt, it should only twist 90 degrees or so, if it twists more than that then it's too loose

you can always spray wd40 or anything really gently onto a belt and if the noise changes you atleast found the circuit with the issue

On1wheel

Tried this seems to be a little tight. The old alternator belt had a chunk missing from it, might be alternator pulley? Will test more tomorrow and post it

holmesnmanny

take off the belts and turn each pulley with your hand, see if one has roughness, more likely the alt bearing

09chaplak

Just take the alternator belt off and start the car. No noise, you know it's that.

slowcivic2k

The sound the system is making is that of diode overload in the alternator. This sound is common to a lot of alternators with bad diodes or brushes. If you do not have a stethoscope, remove the drive belts one at a time when the sound is being produced. From experience, the two main causes are alternator diode failure, and pulley bearing failure. Each case tends to be unique in some way (something usually contributes to the failure).

On1wheel

changed the alternator and sound is gone. Thanks guys

On1wheel

https://youtu.be/e78fKgrH62I

On1wheel

just update the sound was pcv valve. It would come and go and was very hard to tell where it was coming from. Deleted it with catch can and now sound it gone.