To add to this thread, if the valve freezes it can ehiter freeze open or closed. And pressure relief valves on the spark plugs only cover one mode of failure. (which would never work imo as they would let out compression or not be effective enough to release that much viscous liquid at that speed to save the rods, and would cause coil fitment issues) The other mode of failure pressurizes the crankcase and blows the oil out of the weakest link, usually the valve cover gasket. amacman's idea is more plausible as the CCV system is a very low pressure system usually (negative pressure, but still) The valve that would let pressure out would become the fail point for oil blow out while the in valve could possibly let in enough air to prevent it from sucking oil from the crankcase...
But as usual I agree more-so with JCL that it is more important to properly operate and maintain the vehicle than to accommodate for preventable failures. And I also agree with a point he made on a previous thread that most window regulator failures are likely caused by slamming the doors closed with the window down, as when it is down it isn't fully supported by the guide tracks. If you are able to adopt the practice of rolling the windows up before closing the door your regulator should last much longer. Otherwise Tom (mrbmwx5) had a great fix where he used a piece of house wiring (I used coat hanger
) to clamp the cable to the bracket where it breaks out. If you do this as preventative it will make the regulator clip more robust and help prevent failure.