Replaced my serpentine belt on my Ford Ranger 2.3 L and discovered that the tensioner does not spring back. It's just kind of tight and has to be manually moved to apply tension to the belt. I tried shooting some lubricant into it and working it back & forth to loosen it up, but was unsuccessful. I'm guessing I need to replace the tensioner? Is it ok to just move it to apply moderate pressure and drive it like that? It has probably been stuck this way for quite some time. The belt had some small cracks on the underside, but it was not too bad and never gave me a problem. I also noticed that the timing belt is pretty well aged and needs to be replaced. Is there anywhere on-line where I can find good instructions on replacing the timing belt? I have a Haynes manual but it is not very explicit. Thanks.