Thanks Mike, while poking around, I decided to open the cap. As you already know, the upper hose returned to it's normal self. Thanks for the quick reply.
I'm beginning to wonder if I need a water pump at all. The one that's on there may be weeping a tiny amount. It's got 100K on it. The repair looks like quite a job. I just paid to have the air pump replaced. I was hoping to get another month or two before another fairly big repair.
I may go ahead and do it as I drive alot out of town, and if it lets go, it'll cost me dearly in $ and time.
91 300E 120K
90 300SE 275K (sold)
92 BMW 525iM 120K
90 BMW 525iA 175K
85 300D 175K (sold)
84 300SD 245K (sold)