Loud Noise when AC is Turned on

[Paul]

The A/C idler pulley and belt were off for some time. I reinstalled them with a new belt. When the A/C is turned there’s a loud squeeling sound.

At first, the A/C belt would turn slowly when the A/C was turned on. I removed the clutch and one of the small washer shims and now it does not seem to slow down though the noise is still there and loud.

Short clip with audio here: https://youtu.be/ucJ_VhZuefY

The tension idler pulley is fully extended.

Topic

[Paul Hartmann]

that sounds like a belt noise, or else one of the pulley bearings are bad.

[Paul]

It turned out to be the Harmonic Balancer that needed to be replaced.

[Author]

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