I didn't get the original post, but the problem here is that the wiper arm gets reamed out and the nut bottoms out on the shaft and will not pull it down far enough. Go Westy has a fix kit, but the key is just the 7 mm washer, which becomes a shim that allows the arm to be pushed down further. http://www.gowesty.com/product-details.php?v=&id=4373  Not a common size, I went to a specialty fastener shop to find them.

Stuart

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Dan N
Sent: Saturday, December 9, 2017 10:05 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Wiper arm flapping all over the place

you may want to remove the wiper arm and clean the grooves of the pivot real good and the grooves on the wiper arm too... a new and a good used wiper arm is a good idea only if their grooves are in good shape...
- put it back on with a thin washer and tighten it moderately.. and give it test with water on the winshield (as lubricant)
- if the test is good then tighten it some more and give the top of the nut
(10mm) a few drop of Loctite

dan