How do you Check idler pullys

I just bought this 105K 96 S/C and it looks to be well maintained, but I would like to know what is involved in checking the condition of the idler pullys there is a bit of clicking noise in that area. Also I believe there is some noise under load from the S/C
How do loosen and tighten the tensioners my experience is on pre serpentine belt Buicks. Excuse the spelling and Thank You

There is a write up on this site for replacing the Idler and tensioner pulleys that will give you the information you need.
I know you don't need the whole procedure for replacing everything yet, but you can read through it and pick out where it tells you how to de-tension the belts and from there you can rotate and check side to side play of all pulleys.
If you find one bad replace them all with the belts. When one goes bad the others are soon to follow and when they start making noise the amount of time you have before they frag themselves is minimal.
This is known from experience of many of us. It is HIGHLY recommended to replace all pulleys at 100K miles if they haven't already been done.
Click on this link and you may want to check out the "Write Up" section for very good info on a lot of topics.
Welcome to the site:
https://rivperformance.editboard.com/Supercharged-3800-Tech-c2/Series-II-Engine-Transmission-f4/Write-Up-Replacing-Belts-and-Pulleys-t725.htm

If you're sure a certain pulley is making a noise, replace it. You can loosen the belt and test each idler by hand for smoothness. The pulleys should not wobble or make any kind of grinding noise when turned. They should rotate smoothly. At 105k miles, you may want to have all the idler and tensioner pulleys replaced for good insurance.

Better you check them now than have one grenade and take the belt out with it and then you have to loosen the mount and it just gets ugly from there LOL

Not saying it's really hard... just an annoyance.

I have had two of these idlers grenade on me - one on the accessory belt and one on the SC belt.

Please, please, please save yourself the headache and maybe more serious problems, and replace those &$^@#*& things when then become noisy.

Albertj

That clicking noise is exactly how my bad idler pulley sounded. It did it for about 2 weeks or so before the pulley broke, and I realized what it was.

Haven't heard any more from OP; RivGuy.
Wonder how he made out with his noises.????

Had my accessory idler grenade on me. I had no warnings. I had a squeak, but it was from a loose sc belt, not from anything accessory related. I could spray belt dressing on the sc belt and it would go away for a bit, then come back. When it grenaded I didn't hear anything as well, but when I got home I opened my hood to take a look at the belts to see how loose they were and I noticed that my 3.5" idler pulley was now like .5" and wouldn't spin lol. Luckily the belt didn't break, but it did wear it down a bit from the 3 or 4 miles that it was probably driven with no idler pulley.

Best insurance is to replace immediately after hearing any noises. In my experience pulleys last about 100 miles after they start making noise. Don't try to lubricate a pulley that is about to fail, just replace it.

how bout if it has a 1/4" wobble?
gonna do pulley's on the wifes 98 tormorrow.