Car has a ticking noise when started and was told it was an exhaust leak but I'm mechanicaly slow so I don't know. I also started hearing a belt sounding type of wining and was told that it was a throw out bearing and now it idles at 500 in neatrul abut doesn't stay steady goes up to 700 and 1000 back and forth and the wining I'm hearing stops when I press the clutch down the car has 137,000 miles on it and seems healthy other than this