A/C belt. Is this the right way? - PeachParts Mercedes-Benz Forum

E150GT · #1 01-08-2008, 09:21 AM

Last night I decided to put the belt on the A/C compressor back on my 420sel. I replaced the water pump recently and cut all the belts off so I wasnt sure how to put them back on. Well after looking at it, I used a cresent wrench on a flat spot behind the tensioner pulley and pushed down until I could get the belt on. The pulley did not spring back like most car's tensioners. So I just pulled it back up until tight. I tested the A/C and it works just fine with no belt sqeal. Does this sound like the proper way to do this?

david s poole · #2 01-08-2008, 09:34 AM

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.

E150GT · #3 01-08-2008, 09:44 AM

Thanks. I was stumped when I was finishing up the water pump, and I needed my car so I just left it off. It will be nice to have A/C now when it is needed.