Might be as simple as the drum hitting the backing plate due to a rust ridge
or brake dust maybe loose parts inside. It is normal for there to be some
slight side to side moment of the drum. Of course the hub nut and bearings
should be checked. If the drum was ever pried off, the backing plate may
also be bent. Too far away on one side means to close 90 degrees away.

Dennis

>From: Bob Martens <r.e.martens@ATT.NET>
>Reply-To: r.e.martens@ATT.NET
>To: vanagon@GERRY.VANAGON.COM
>Subject: 85 westy brake or wheel bearing noise
>Date: Mon, 14 May 2007 00:37:52 +0000
>
>Half way through our trip from Fl to Montana and we have a scraping
>noise(metal to metal that speeds up and slows with the van speed) coming
>from our left rear wheel. The weird thing is that it only does it while
>turning left or driving across a slanted parking lot and the van is leaning
>to the left (driver is on the down hill side). Just had new tires put on
>but no other work has been done recently. We pulled into Branson Missouri
>to wait till Mon. to put the van up on  a lift. Any ideas out there?
>Thanks, Bob