all of the sudden I got a grinding sound out of the left front of my tiburon gets worse at higher speeds and seems to grind and kinda pop when turning hard. on expressway would be a steady grinding sound occasionally whistle then go silent then back 2 grinding. something serious? or wheel bearing or something please help

Dear dg,

Are you noticing changes in your braking? Your Tiburon has a squeal indicator on the front and rear brake pads. The squeal indicator is a metal tab that emits a loud squeal when the pads wear down below safe limits. If you ignore this and keep going, you wear off the remaining friction material and you hear grinding. This is the metal face of the pad grinding the metal face of the rotor.

Jack up the front of your car. Place jack stands under the left and right front frame. Once the jack stands are placed, spin each of the front wheels by hand as fast as you can get them. Observe and listen. Is the sound on the left front wheel, or the right front wheel? Have a helper apply the brakes gradually? Does the grinding get drastically louder? Remove your left front wheel. Inspect the rotor and your brake pad thickness. Is the pad thickness 1/4 inch or more for both the inside and outside pad? Any scoring or cuts on the left rotor?Repeat the process for the right front.

If your problem is not your brake pads and rotors ( cheap and simple to fix), it is your bearings. You demonstrated by turning the front wheels by hand with no braking. The wheels should have turned freely and relatively quietly for 30 seconds or more.

If you eliminate the front bearings, brakes and rotors as the source of the noise, jack up the rear of the car, place jack stands, and repeat the inspection process.

Byron

You can also check your cv axles.