Coolant Will kill any belt. Coolant have additives that lube/protect WP seal.
1. fix the leak
All pulleys. tips See my Cave, Serpent Belt
3. use New belts
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
The Ogre's Fiero Cave (It's also at the top and bottom of every forum page...)