This past weekend, I noticed a cold wet spot on the carpeting near the sliding door.  In addition, the "insulation" (behind the vertical plastic panels) in the rear hatch area is dripping water.  The vehicle is an '87 Weekender. I suspect there must be a condensation drain of some sort that might be blocked/plugged up?  Anyone have this happen and have a suggestion for repair? I apologize, in advance, if this information is readily available in the archived files ... I am new to this list and have been unable to successfully complete a search of the archive. TIAVern in Nebraska'87 Weekender'72 & '73 BMW Bavarias

Vern,
Same van, same problem. Is yours white? Assuming your condensate drip pan and drain hoses are intact and the hoses are not clogged, try extending the hoses through the bottom of the air intake cavity and placing a road draft tube boot on the end. This will stop air from being drawn up the drain hose as condensate is trying to go down the same hose. You see, these drain hoses are subject to vacuum created by the air blowers. As blower speed increases more vacuum is developed and effectively stops condensate from draining. The road draft tube boot is used on old air cooled motors  on the oil filer neck drain tube. The boot is a 3 inch piece of rubber hose pinched at one end. The pinched end has a slit which functions as a check valve. Condensate can drain through it but air is stopped. West Coast Metric (http://www.westcoastmetric.com/30.html) has this part. On the aforementioned page it is P/N: G.311-541. It is no doubt available at your VW dealer or local VW parts house.
WR   Deaner
'87 GL
'87 GL Syncro