Recently i was getting some squeeling from loose belts on cold startups, so i got under the car and tightened the bolt, unbeknown that it was the wrong one. I later had a look and realised it was the alternator belt that was slipping. So i tightened the belt tensioner bolt on the alternator.. Squeeling fixed.
But, the bolt under the car, for the big belt.. not sure what it runs, is fairly tight.
How tight is too tight? I can push the belt a few mm, but other than that its very tight.
I tried undoing the bolt, which is how you loosen the belt, but it just screws out without moving the adjustor wheel.