Re: 2001 2dr civic ex a/c squeal.
There is a tensioner for the timing belt but the accessory drive belts for the power steering, A/C and alternator are adjusted manually. If the slipping has not been bad and glazed the belts, you should be able to tighten them and they should be fine. Don't get carried away and tighten them too much or you risk damage to the power steering, A/C or alternator bearings. I believe the power steering and A/C belt is adjusted from the top of the engine by turning a wingnut. You may have to loosen a locking nut so that the power steering pump can move. If you have to adjust the alternator belt, remove the wheel and the plastic flap to get to it.