Avanza squeking sound problem (pulley related?)

Nasira po yun magnetic clutch ng aircon compressor. we had it replaced by third party vendors. Pinalitan yun buong pulley assembly ng third party.

Pagkatapos po palitan, we traveled from Bulacan to Paranaque and nun asa SLEX na kami we heard a loud squeaking sound. My hubby said it may be the belt (not tight enough).

The following day we had the belt tightened by third party. Nawala yun sound pero pag 3500 to 4000 yun rev ng makina, may sound pa din.

After we parked the car for 4 to 8 hours, we noticed that there's a loud squeking sound upon car startup. Then gradually the noise lessens. Hanggang maririnig nalang yun sound pag 3000 rpm.

Ano po kaya ang problema nito? Ang iniisip ng asawa ko baka hindi daw compatible yun pulley sa belt at nag s slip ang belt. Gusto nya na tanggalin nalang yun magnetic clutch dun sa third party pulley and ilagay sa original pulley. pwede ba yun?

Possible ba na yun bearing sa pulley ay basag? If so, bakit humihina yun noise kapag matagal na nakabukas ang makina up to the point na nairirnig nalang yun sound kapag nag 3000 rpm whereas upon startup malakas talaga yun sound.

May iba pa kaya na problema ang sasakyan?

Your help is appreciated