Hello All,
Recently working on the '00 540i I noticed that the Alt/WP/PS belt tensioner was sorta weak, not providing the tension I expected. I had the tensioner assembly off while working on the car and the idler bearings sound a bit dry too. What is the verdict for R&R these parts? I see the tensioner(s) are both available, I figure do the AC while I'm at it? Do the idler pulleys warrant replacement as well? I see a complete assembly for the alt/WP/PS but the AC I would need the tensioner AND the idler pulley....

Are the tensioners serviceable? I've worked on vehicles that simply disassembling the tensioner, cleaning it and lubing it would make it like new....

I'm inclined to replace the bad tensioner, sneak the grease needle into the idler bearing seals and call it a day. Unless the idlers are known timebombs...

RT