I have an '89 Geo Tracker that I changed the head on. Everything has gone back together well and I replaced the timing belt and idler pulley as well. I started it up without the timing cover on to make sure everything was working, and the belt runs half on-half off the cam and crank pulleys. The tension spring is on the idler, but the tensioner bar is tightened by a bolt, so it seems redundant. I loosened the bolt and cranked it, hoping it may tension itself and I could adjust it. I am pretty sure it won't last when half of it doesn't even sit on the pulleys. I checked pulley alignment and it is good. The belt doesn't have a directional arrow on it, but when I reinstalled it the other way, it came off instantly. Any ideas?