All the bakelite style factory valves had their issues...But the real question is how long do you think it takes for it to fail in your application ??? I've had them last for quite a few years{as in 10 plus} under occasional driving...Now if you're driving to work every day and cranking the heat during the winter using the valve then it might fail somewhat quicker...I guess it all comes down to whether you want the engine bay to look original or it doesn't matter...