yes that is the way to do it.it is not a tensioner pulley it is an idler pulley and is the only adjustment on the a/c belt.listen with stethoscope at arm with engine running to make sure that bearing is good in pulley,common problem.

__________________
David S Poole
European Performance
Dallas, TX
4696880422

"Fortune favors the prepared mind"
1987 Mercedes Benz 420SEL
1988 Mercedes Benz 300TE (With new evaporator)
2000 Mercedes Benz C280
http://www.w108.org/gallery/albums/A...1159.thumb.jpg