Is there a good technical discussion of threaded fastener theory anywhere on the forum? Or another forum anyone knows of? I don't really know how to search for such a thing, but maybe someone knows the whereabouts of one? I don't really *get* the whole business of so-called stretch bolts, and how to tell which if any really need replacement when undone. I've found this which seems quite a nice piece of work, but there must be a whole lot more info out there, if you know where to find it. I will admit to not having read that link thoroughly myself yet, but I will. It seems like more and more bolts are being described as requiring replacement, according to official VAG instructions for recent cars, but is that vital or just precautionary? Legislation? Insurance? I guess the fasteners are an insignificant cost to dealerships compared with a car coming back with something hanging off... Discuss? Thanks smudge, for moving this here.
