Hey wanted to find out if anyone has had the infamous tick. Well i have and have had the hydraulic lifters replaced. Good news is the dealer fixed the issue bad news is i've had several issues since. Coolant smell won't go away passed a pressure test was told it was just a little build up and was cleaned... Still smell it. Also dave after the repair cheek engine light came on. Turned our to be a bad Knock Sensor had to get that replaced which I PAID FOR.... Now just received a check engine light for a bad O2 sensor. This is getting out of had. Please someone that has good experience tell me this is all related. They did NOT replace the Head itself just the lifters and the exhaust manifold. HELP!! been back to the dealer 5 times now. any thoughts???