I was surprised to not see this posted in this forum but feel obligated to warn everyone. Keep an eye on your coolant overflow tank and if you see the coolant level going down leaving no coolant on your garage floor there is a good chance that your water pump is failing. My '09 TCH has a little over 52k miles on it and is 7 months short of 5 years old. I saw the coolant level was low so I had Toyota check it out and replace the pump as part of the power train warranty. I have read that many Toyota Camry owners are having water pump problems so it is smart to have it checked out before you are past the 5 year 60,000 mile power train warranty period.