Specifically on the twin cam cars... I have an '01 SL2 and I just had to go through swapping the PS pulley which included throwing a new belt on the car. That thing is a son of a (expletive deleted) to get on there if you have big hands...

I was half tempted to support the engine with a floor jack / jack stand and pull the motor mount to give me some room to work...

 

your other post says you're done...for the record, it's much easier if you do pull the upper mount

 

I don't remember, I had mine apart a couple of years ago to change the Alternator and I had problems with the belt tensioner. I seem to remember I had to replace it some time in the past.
But I have had the car for about 12 years and it has been largely trouble free. I have broken down and bought a serpentine belt tensioner wrench. I have worked on way too many east west engines with no clearance for the drive belts to try to loosen tension with the wrong wrenches any longer.

 

Like Derf says, jack up the engine and remove the upper motor mount. With an impact, that's that's a 5 minute job...total...and that includes searching for the 15mm deep socket.

 

The fellas have hit all the "high spots" on serpentine belts, so I'll just say I hope you didn't lose too much skin off knuckles and/or back of your hands ....