I am trying to install a new fan belt on my 1995 E 320 (M104) I have the mercedes bible and the nut they say to losen 1/2 turn for the tensioner is not there. I do not see any place for it. Got any ideas???


Brian Felts

If the tensioner is what I'm thinking of it's at about the 7 o'clock position of the power steering pulley, an inch or so towards the rear. It takes a 17 or 19mm socket.

Sixto
87 300SDL

There is nothing there! I have searched the entire area. There is nothing to put a socket on. Could I have a late 95 with a 96 tensioner? I am lost on this one. I can't find anything broken off, got any other ideas. I will go back and look where you said sixto jsut incase I missed something.


Thanks
Brian

My bad. Quoting M103 procedures for an M104. The tensioner pulley is directly below the water pump pulley. Pry off the plastic cap at the center of the tensioner pulley to expose the nut or bolt to loosen.

Sixto
87 300SDL

Woah, the above procedure is for a tensioner with a pointer. If you have an automatic tensioner (hey, MB, why so late?), the tensioner pulley will have an exposed bolt head. Turning the bolt clockwise will relieve belt tension. Modern GM and Chrysler V6s have this type of belt tensioner.

Sixto
87 300SDL

The easiet way to tell AFAIK is if the bolt is recessed in the pulley it's the pointer type, if the bolt is in front of the pulley such that you can get a flat box wrench on it it's the automatic type.

Sixto
87 300SDL

Yes Mine is just below the water pump and I do have a Nut on a stud sticking out of the front of mine..........I think we may be on to something!!

Thanks
Brian

Sixto!!!!!!!! You were right on the money, I was just afraid to pull on it too hard and break it. Now the belt is off and we are in the right direction....


Can't thank you enough.

Brian