Just got my "new" cobalt back from the shop after sending it in to investigate a ticking problem. Found out that the Timing chain tensioner, timing chain, timing gears, timing guides, as well as the serpentine belt tensioner are all going to hell. All that plus 5 hours labor came to a grand total of $900.....which i dont have since i dumped just about every penny i had into getting this car. Not sure what to do. Is this car a ticking time bomb? Can i still drive it without worrying about blowing up my engine?