A tapping sound does not sound good. Possibley a valve or lifter? The manual says to change the timing belt at 60K... then just basic stuff... oil/filter... tranni fluid... whatever else they throw in for the $500 the dealer charges.
I'm not 100% but I don't think there is anything to adjust on the car's timing... it's computer controlled... someone else may have a better answer though.
Good Luck with it
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