Its not a matter of "mysteriously" cracking, its a matter of a system failing due to in part, inclement weather. If you want to look at it that way, every part fails "mysteriously". I have washed my car in -20F weather and had the entire car frozen over in a layer of ice minutes after, no problems. I have driven through rain so hard multiple times, that everybody was pulling over to the side of road because visibility was no more than 1 ft in front of the car. You should never have to use black RTV. I have owned Aircooled VW's too, and when I could have used RTV I just replaced the parts/pieces that were bad and problem was fixed. Don't be lazy and think you are smarter than the millions of dollars that went into R&D on these cars! Why do you think you got no results in your search and no other responses in your posts!
