Loud Screeching sound

[Noquacks]

People,

1987 Sunbird, when I switch on the ac button to activate compressor there is immediately a loud screeching sound from the comp area. It stops after about 7-8 seconds. Vents put out ice cold ac. Then, every about 5 minutes the sound comes back, then again, goes away. Could it be the loose ac belt needing tightening? Maybe low on compressor oil?

Thanks, people.

[Cusser]

Could it be the loose ac belt needing tightening?

That should be easy enough to check.

I might pull the belt, and check any tensioners and AC clutch pulley bearings for drag or noise. And maybe install a brand new belt.

[Noquacks]

Could it be the loose ac belt needing tightening?

That should be easy enough to check.

I might pull the belt, and check any tensioners and AC clutch pulley bearings for drag or noise. And maybe install a brand new belt.

Thanks, Cusser. Good tips. Will try those checks this weekend!