need help fixing engine noise in 2002 sonata

[Subdoofus]

i am upset with my 02 sonata. first i had a grinding noise that no one was able to idenitfy that came with higher RPM's as the car heated up....when they figured out it was the waterpump at fault....now my engine makes soooo much noise....compared to what it was new.....the engine really rocks and vibrates like crazy on a cold start and i wait for it's rpm to drop to 900 before driving it
also i hear a significant rattle on the right side door/door panel/seat belt panel
who can i approach about these problems
my dealer is very rude and makes me feel like a fool for turning up again and again....this car is only 6 mo. old and gives me a lot of problems as compared to my 14 yr old maxima....i'm not being inflammatory....i just have bad luck
some one help....i am a student and this is my life's savings

[MechaniX_034]

Dude if the car is only 6 mths old take it to the dealer and have him fixed under the warranty! The person attending to you, if he gives you any more grief, well lets just say he's giving the trade a bad name. Write a letter of complaint highlighting the problems with your car and the conduct of the service personnel in question. He'll either take the walk down washout lane or he'll be extra nice to you in the future.

[NY-XG350L]

What you can do is try going to another dealership and see if they can fix the problem after a few days. If not then ask them for a reciept say that they cant find the problem and bring your car to another dealership and do the same thing. If none of the dealers can fix the car then try complaining to hyundai about buying a lemon. You might have been unlucky and got one of the odd ones.