Re: serpentime belt
You can replace the belt and/or the adjuster but you can't "tighten" it... I spilled some antifreeze on the belt on my 90 Mark 7 a few years ago and it always slipped on damp days after that...
07 Roush 427R, Brembo 14" rotor and four piston calipers
05 GT Mustang, FRPP, FR X pipe, Hurst short throw,
American Racing Torque Thrust 10X20 wheels,
Granettelli tower brace, custom painted flat black grafix, Yellow Optima