Help with noise issue

I have a 07 LGT, recently I had the idler pully and belts changed due to maintenance. Lately he mornings have been getting colder and now I'm getting a squealing noise. I couldn't pinpoint the issusend but I assumed it was coming from the recently changed belts. I proceeded to tighten them, then wait till the morning to see if the same issue occurred. Which it did. I don't know where to go from here, can someone push me into the right direction.

 

Thank you

How much play is there in the belts ?

 

I think 1/4 -3/8" is the Spec for that.

I didn't check when I tighten them but they don't have that much play.

Have you had the timing belt serviced? Including replacing idlers/tensioner?

 

I had a similar situation and it ended up being the small timing belt idler. I tried to adjust the accessory belts first and it didn't help. Then I removed both accessory belts and started it for a short bit and the squeal was still there. Pulled the timing covers off and used a stethoscope to pinpoint the bad pulley bearing.

 

Check the accessory belt tension against the specs that Max posted first.

I replaced the timing and the alternator belt. I'll check and adjust them again.

Did you replace the 2 smooth, cogged and small smooth rollers, as well as the water pump?

Manual or automatic transmission, how many miles? Could be the throw out bearing on its way out if it goes away when you push the clutch pedal in

The milage is 68,600ish, and its a manual. I haven't pressed my foot on the clutch while it was making noise. I will do that tonight to give the car a chance to cool down. I only replaced the 2 belts, idler pulley and some small attachments that held them together. But not any rollers or water pump.