My 06 Azera is making a clicking noise during acceleration on cold starts. It sounds like a valve noise like a lifter not getting enough oil. The oil level is fine been using 5w30 since I bought the car. The dealer said they couldn't duplicate the noise so they dismissed it.
clicking noise on cold start-up on 2006 Hyundai Azera
by razorblade in Knoxville, TN on February 13, 2011
ANSWER by DaveJM , February 13, 2011
First thing that pops out at me: Your car takes 5W20, not 5W30. This can cause some engine issues, so please make sure to use the correct grade. That could be the entire answer to your issues.
ANSWER by jlarry1 , June 15, 2012
I had the same problem took it o dealer and they fixed the problem, bad lifters