I saw this thread, went out to check mine and there was rust. I called the local Subaru dealer yesterday and they got me in today to look at it. They ordered my parts (for free!) and I am having them installed next Wed. They will also pay up to $5 for spray paint for when you sand/paint it to fix it. Definitely impressed with the dealership I've went to twice now.
Have a 19 impreza sport cvt. Have the larger caps but still has liquid and is very rusty but only on the passenger side. Took it to dealer and they said it was "normal" and did nothing about it. I also have knocking and clunking coming from the passenger side. By normal i guess they meant yeah its a very common problem. Any thoughts? Should I get them to replace anything from the strut?
For help to anyone with the larger caps installed... I have a 17 5spd that developed some lite rust under the orig caps. Cleaned, rust prevention sprayed and big caps... Fast forward a few weeks and the water was back.
Root of the story: Some chemicals react and make rubber swell. If you still have water beneath your caps, try a different chemical or try none. My caps looked like accordions... After re cleaning and boiling the caps they were fine and rust didn't return *yet
I posted on this issue yesterday and then I started thinking. In my work we buy lots of stainless and carbon steel pipe of various diameters to be used on large industrial projects, it often comes from the factory (seems all pipe comes from China these days) fitted with plastic end caps made of a nylon type plastic which is tough but has a degree of flexibility., I've seen lots of different designs come with the pipe. These caps get thrown in the bin after the pipe gets cut and welded. I might try if I can press fit one of these if I can find the right diameter into the recess preventing water from entering, Here's what I mean Pvc Pipe Fitting End Cap,Pipe Fitting End Caps,Pipe Fitting Plug - Buy Pvc Pipe Fitting End Cap,Pipe Fitting End Caps,Pipe Fitting Plug Product on Alibaba.com