if yours is 88 190e 2.3 8v, then u need to take alternator out, since its in the way.
Mines I use a 32 MM socket to undo the big bolt. According to the book there's a bit of tension when release, it can shoot across. put a foam, rag to diffuse the shoot out.

My serpentine belt tension screw is screwed literally. As I release it , it never let the serp belt loose. In the end I used a Long screw driver to pry on the idler wheel to release the tension so I can slid off the belt. I also whacked the tension screw a few times, now It can neither hook up nor can come out. Tomorrow I will take power steering pump off to see if I can hook her back, ANybody knows what right way to do?

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