2005 ford taurus sel-i have replaced the belt 3 times in last 6 months, replaced tensioner and stabilezed pulley and belt still chirps. Belt dressing makes it worse. Cleaned belt and pulleys off. It stopped when I sprayed water on the belt and pulleys but quickly returned! This is driving me nuts! What can I do besides replacing everything!

SOURCE: change serpentine belt and tension pulley and idle pulley and

could be the alternator, water pump
take the belt and spin all the pulleys and listen for noise and make sure they turn smoothly
another trick is to take a can of wd40 or equivalent and spray the bearings 1 at a time till the noise goes away or quiets down

SOURCE: Replace belt tensioner pulley on 1994 buick skylark

You need to put a piece of wood underneath the oil pan and place a jack underneath the oil pan/motor, loosen the motor mounts that are next to the belts, then raise the motor enough to reveal the nuts/bolts for pulley...just dont raise the oil pan so high that you crush it or break something, only enough to be able to reach tension pulley...

SOURCE: 2006 Nissan frontier 4 cylinder belt diagram + tensioner pulley

They are under the hood or on the front crossmember.

Regards,
matt

SOURCE: My belt tensioner pulley broke at the bolt that

You should only remove the drive belt shield if you raise the car. Below are step-by-step instructions per the repair manual. Drive Belt Tensioner
Removal & Installation To Remove:

1. Disconnect the negative battery cable.
2. Raise and safely support the vehicle.
3. Remove the drive belt shield at the right wheel well.
4. Remove the drive belt.
5. Remove the drive belt tensioner mounting bolt.
6. Remove the drive belt tensioner.

1. Install the belt tensioner. Torque the mounting bolt to 21 ft. lbs. (28 Nm).
2. Install the drive belt.
3. Install the drive belt shield.
4. Lower the vehicle.
5. Connect the negative battery cable.

SOURCE: How to replace tensioner pulley on 2000 Dodge Neon

Make sure you locate the Serpentine Belt Routing Sticker before you proceed. If not make an excellent drawing and take a GOOD Picture. Do NOT try to just remember how it goes back on Should be a 15mm wrench to loosen tensioner to remove belt. Locate mounting bolts to tensioner and remove, replace with NEW tensioner tighten bolts then use wrench arc torque about 15 degrees should snug it down, reroute belt then using 15mm pull tensioner to either side of belt to install belt in correct route. Remove all tools and body parts from engine bay. Do not start engine if anyone is in the vicinity of engine bay. Belt may fly off if you did not do it right and cause all kinds of shrapnell, if it doesn't fly off, visually inspect belt before starting and after, I would suggest being very careful before during and after starting to insure safety.