if its not sucking,,,take the belts off and fire it up for a min or two, see if the sound is still there, hand spin all them pulleys if the sound is gone.

you can also wash the belts, scrub brush and hot soapy water works great.

also make sure the belts are on the balancer all the way, ive put the sc belt on and had one rib riding the edge of the balancer. makes the tensioner really tight too.