What is the reason for the grunting sound of the front kill disc when driving at low speeds

1。Check the bearing or ball joint. 2。Check the brake shoes. 3. Check the shock absorber.

It may be time to change the brake pads

This may be the sound of the tire entrained with stones, hello owner, this is a problem with the engine floor parts, the sound is generally the boom has a wear gap, and the replacement can solve the problem. Specifically, you need to go to the nearest repair shop for confirmation and replacement. I hope my answer will be helpful to you.

Most of the grunt comes from the hand shock absorber, if the sound comes from a corner of the chassis, it may be that there is a problem with the shock absorber of your car; It is recommended to go to a 4S shop or repair shop for a check-up.

Check the shock-absorbing top glue.

Check the tie rod, lower arm ball joint, parallel bar rubber sleeve,

Disc brake abnormal noise features: when the vehicle is driving on a flat road at a low speed, it emits an intermittent and irregular "rattling" sound at the axle part, and the sound will be slightly aggravated when the speed increases, but there is no change when going downhill and turning; When driving on uneven roads, the sound is aggravated, and the sound of pressing the brake pedal with your foot is reduced or eliminated. When stopping for inspection, you can hear an abnormal sound by rotating the wheels back and forth.

Reason: This is due to the damage, deformation and falling off of the brake shoe support plate, vibration damping spring plate or guide plate of the disc brake, which increases the gap between the brake shoe and the brake caliper support frame, and makes a sound when it hits each other. You can go to the repair station to repair the deformed parts and replace the parts that have fallen off.

Front suspension ball head abnormal sound features: when the vehicle is driving on the undulating road surface at low speed, the front axle part emits an uninterrupted "click" sound, the worse the road quality, the louder the sound, the sound intensifies with the increase of vehicle speed, and the front of the vehicle will be shaken left and right after parking. If the vehicle is driving on a flat road, there will be an intermittent and irregular noise on the front axle, such as the crash of steel breaking.

Reason: The gap between the ball head and the ball head seat becomes larger, and the looseness is severe. Because the ball head seat is a sealed structure and cannot be removed, it can only be replaced at the repair station in this case.

Abnormal noise of front wheel shock absorber Features: On a flat road, you can slightly hear the "cooing" sound in the front of the vehicle, and the sound intensifies when turning a sharp corner. When stopping for inspection, press and hold the front of the vehicle firmly to make it rebound up and down, and abnormal noises appear, and the greater the force, the louder the sound.

At the same time, it feels that the vehicle is inelastic and not soft. Cause: Vehicles are often driven on bad roads and are not properly maintained, resulting in oil leakage and damage to shock absorbers.

At the workshop, this is done by repairing or replacing it depending on the severity of the damage.

Look at the ball head is the part is the problem is there.

When the car starts to start, there is a "cooing" sound, which is the sound when the brake pads and the brake disc are in semi-contact, or semi-slipping.

When the automatic transmission starts (at this time, it is generally in D gear and the handbrake is released), when you slowly release the brake pedal, the wheels are subjected to the forward driving force of the automatic transmission and the braking system at the same time. At the moment of starting, the two-phase effect is almost indistinguishable, so at this moment of dilemma, the brake pad brake disc is in a semi-contact, semi-slip state, there will be a "coo-goo-goo--" sound, which can often be heard in the car.

In addition, this sound is often more noticeable when the brake pads are water-stained or the brake discs are rusted after a car wash.

Let's see if there is less booster oil!

My car also had this kind of cooing, and I asked the mechanic to try it a few times in the local 4S shop, but there was no explanation, and I said that it was like this, and I didn't look directly at it. Sometimes you hear it obviously, sometimes you don't hear anything, and for some reason, you can make this cooing sound when you turn around on the spot.

1. It may be shock absorption, or the chassis screws are loose, it is recommended to go to the maintenance station to raise the car to check whether the arms and tie rods are good and loosen the frame.

2. Check the wheel half-shaft bearing, which should be replaced in time. If necessary, go to the 4S store for a professional inspection.