Just fixed my timing yesterday and where the belts are (under the power steering pump) there is a loud grinding noise that is mostly noticeable on a cold start and seems to quiet down after warm up. My neighbor came over to check it out and told me it was the a/c clutch or maybe a pulley bearing is shot, turning on the a/c makes it idle badly. On a cold start the engine idles very low and at a stop it stalled on me, restated it and was fine after that. So what do you guys think?
Civic EX 2000 D16Y8 Engine Auto.

 

Loosen and remove the A/C belt(*) then spin the pulleys by hand. They should be very quiet and not have any wobble.

(*) Loosen but don't remove the 14 mm nut on the tensioner shaft. Using a 10 mm 1/4 inch drive socket with a long extension, turn the jack screw counterclockwise to lower the tensioner and loosen the belt.

 

This is just great before I even tried anything this morning when I turned on my car the a/c belt broke off and white smoke came out the tail.
I dont know how old it was cause its a second hand car but anyway is it hard to replace or should i take it to a mechanic because i'm kind of a noob on this. and while i'm down there might aswell get the timing belt and water pump to right?

 

The belt probably broke because the pulley seized up, so that'll need to be replaced as well -- not just the belt. I assume the noise is gone now?

 

yep the sound is gone which is great but its not fixed . So i guess its time to go to pick n pull for some parts.
Thanks for the info.