Hi i have a 2004 hyundai sonata recently my car has been making sort of a vibrating noise and a feeling and i dont knoe what it is and theres no check engine light on please someone help i dont knoe whats wrong it bothers me

Boy, it sure seems a lot of work to capitalize every word...

It is an odd answer, but I think one or more of your intake valve are not sealing. Engines make a horrific amount of noise if you pull one spark plug, then start it with the other plugs still in.

There just is nothing in the intake system that can make noise, except what is on the other side of the intake valves.

Do a compression check. If the intake valves are having a sealing problem, the compression will be low.

If the cam that opens the intake valves is late, you could get a short backward flow just before the valve shuts, which could make some noise.

This is a truly odd complaint you have. But that;s all I can think of that could do this.

did they overfill the crankcase.you may have way too much oil in it .?

Your alternator bearing can make that noise when it is going bad. Open the hood and find the alternator. Search on the internet to see what it looks like. That is easier than trying to explain it. Take a metal rod or a 3/8" drive 12" to 18" extension and with the engine running, carefully place one end of the rod on the alternator case and the other to your ear. BE VERY CAREFUL TO NOT TOUCH ANY ELECTRICAL CONNECTIONS OR MOVING PARTS. IF YOU DO'T FEEL COMFORTABLE DOING THIS, TAKE THE CAR TO A CERTIFIED MECHANIC. You can check the water pump with this same technic which could be making the sound but I would bet it's the alternator. Replacement is how to fix it.

Click on the following direct, Free Link. It has several Diagrams including the Timing Belt + Marks for your 2004 Hyundai Sonata 2.4L DOHC In-Line 4-Cylinder Engine (located on the bottom half of the Page on the Link). There are additional Diagrams that will prove to be helpful while you are doing this...

Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.com!

http://www.2carpros.com/car_repair_information/year/2004/make/hyundai/model/sonata/2004_hyundai_sonata_timing_belt_diagram_marks.htm

LOOK ON BOTTOM SIDE OIL PAN.YOU WILL SEE A SMALL METRIC BOLT WITH O RING.YOUR SONATA HOLDS 4.2 QUARTS.

hi,
i have attached the image of the spark plugs and their location of them, in your car. Hope your problem is solved.Please rate my solution as helpful.Have a nice day.

Check the engine mounting!

Have the exhaust system inspected.

Here is a diagram of you timing marks good luck and thanks for using FIX YA . please leave me a feedback.http://www.2carpros.com/car_repair_information/year/2004/make/hyundai/model/sonata/2004_hyundai_sonata_timing_belt_diagram_marks.htm

Where do you feel the vibration? if you feel it where you sit it is coming from back which is usually rear brakes. If you feel the vibration in your feet and hands it is coming from the front which could be your ABS or front brakes.