Edv505 idler pulley failing - Cars & Trucks

Belts should have a half inch of play on the longest distance between pulleys...when you push down on it with your finger...not too tight or too loose.

Check the tensioner pulley and others for wear in the bearings as they can wear and fall apart...

Check for shiny spots on the belts for wear..also, Usually a bad or failing idler pulley will produce a few symptoms that can notify you of an issue.

Visibly worn pulleys. One of the first symptoms of an issue with an idler pulley is visible wear on the pulley. ...
Belt squealing. ...Damaged bearing or pulley. Like the belt tensioner pulley, it's designed to remove that annoying belt vibration that's caused by excessive belt slack. The only difference between them is that the tensioner is mounted on an adjustable bolt, while the idler pulley isn't..... cheer's

Possible failed bearing on tensioner pulley, idler pulley, A/C pulley, alternator pulley, or power steering pulley.

for a belt to run off the pulleys , one of the pulleys will not be mounted parallel to all the other pulleys
check alternator pulley for alignment, power steering for alignment and tensioner pulleys for alignment
place a long straight edge across the faces of the pulleys to another pulley and see if it touches both side of the pulleys
check the idler pulley for failing bearings that will not allow that pulley to run in line under tension

Could be that the idler pulley bearing has failed (just replace the idler pulley) but first take a real close look all around the pulley looking for a very small piece of an old belt that has been burned onto it. If anything is on the pulley just clean it real good and the chirping may stop (real cheal fix).

you can buy idler tension pulley pretty reasonable.should cost over hundred dollars.auto parts stores has them wont cost as much but dealership idler tensioner will cost more.should be able to buy one at least little above $60.00

I guess it depends on what failed.
The idler pulley is a simple pulley with a bearing held on by a large bolt.
If the bolt broke, or came loose, you may have problems keeping a new bolt in place.
If the bearing wore out and came apart, the bolt is probably still in the bracket. A failed bearing is common after 10 or 15 years, a loose bolt is somewhat rare.
The belt tensioner is another pulley mounted on a spring-loaded arm that keeps the belt tight. Same design but a different function.

the clutch and bearing assembly is failing it is a freewheeling pulley till clutch is engaged but it has bearings which can fail

Locate the idler pulley to the left of the crankshaft pulley. The idler pulley bolts to the idler arm. The idler pulley is replaced with the arm because they are sold as one unit.

2 Place a 3/8-inch ratchet driver into the square hole on the face of the idler pulley and pull up on the handle. This releases tension on the Sonoma's serpentine belt. Pull the belt off the idler pulley, lower and remove the ratchet handle.

3 Remove the two bolts that secure the idler arm to the engine block using a socket and ratchet, and discard the old idler arm.

4 Place the new idler arm against the engine block and secure it using the socket and ratchet.

5 Put the ratchet driver into the square hole on the new idler pulley, pull up on the handle and place the serpentine belt over the pulley.

6 Lower and remove the ratchet handle.

usually due to a bad bearing, or from resistance due to a frozen or failing assemble, as in power steering, alternator, or an idler. The best way to determine is to remove the belt and check all pulleys for play and resistance.

Check or ask for itemised invoice .
If says check belts etc...go from there?