Well that sort of depends, sometimes you'll notice you have to add a little coolant every now and then, other times the beeotch can dump alot of water into the valley. Question is do you want to chance it? I have 5 cars with 3800's after the first one needed LIM gaskets they all got LIM gaskets, every one of the Intake gaskets was leaking to some extent. The longer you wait the more potential for more serious damage you have. Sort of like how long would you drive a round with a nail in your tire if you knew the nail was there. It's a crappy design that will fail for sure, and I wouldn't waste time waiting on it to do so.
