hey, im just wondering a few things about my 93 LS (V6, 5 speed).....it has 69,000 miles and i just did the 60k service and the previous owner had just done the timing chain. i am curious as to what might be needing a replacement soon, i have heard the watewr pumps are faulty, but i don't know when they start to go, also, how often shuld i change my plugs and wires on this car??? does it show any noticeable signs when they need replacing?? thanx for the help