My cam and lifters in my 2013 hemi went out at 143,000. I took it in thinking the exhaust bolts were broken again. It never threw any codes. I caught it just in time to save the motor. They had the truck for 1 month. I had the lifetime warranty so it just cost me 100.00. If the motor has been bad it would have cost 15,000.00. They pull the plenum to see if there is any metal in a valve under there if its clean they can just do a cam job. If I had needed a motor they would have bought the truck for market value and canceled the warranty. I was lucky now i still have full coverage until the value of the repair is more than the value of the truck. A week after the cam job the heater core stopped up. Another 100.00 and I was on the road again. The lifetime warranty was the best purchase I ever made. I paid 2,200.00 for it.