My project started out as a simple valve cover replacement, but CraigInCanada talked me into intalling the Beisan Vanos seal kit in my M52TU Double Vanos-equipped 528i, since I was practically halfway there in terms of disassembly, in spite of the fact that I really hadn't detected any Vanos-related issues on my 70,000-mile engine.

My quesion is this:

Should the same principle of fixing what isn't yet broken also apply to Beisan's Vanos anti-rattle kit, or should it not?

Thanks for weighing in.