I just looked at my 85 and 84 M110 and do not see any "bleeding provisions". I did notice a line fastened with a banjo bolt that attaches below the upper hose on the housing....see photos below
Hello from Belgium.
I had such a overheating problem after water pump replacement.
I "simply" had to release a little the "banjo" screw (on the steel pipe) on the left of the picture.
Air bleeded, temp went back to normal.