What to Do When the Greiz Makes Abnormal Noise When Starting and Braking?

[DiEleanor]

The solutions for the Greiz making abnormal noise when starting and braking are: 1. Check if there is an issue with the lubrication of the top rubber or buffer rubber of the shock absorber; 2. Break in the new brake friction pads; 3. Replace the brake pads in a timely manner; 4. Clean any foreign objects on the surface of the brake disc. The Greiz is a compact 4-door, 5-seater sedan with body dimensions of 4495mm in length, 1705mm in width, 1477mm in height, and a wheelbase of 2600mm. The Greiz is equipped with a 1.5L engine, delivering a maximum power of 96kW and a maximum torque of 155Nm. It adopts a front-engine, front-wheel-drive layout, with a MacPherson independent front suspension and a torsion beam non-independent rear suspension.

[Alexa]

I've been driving my Greiz for three years and have also encountered the issue of strange noises when starting and braking. After careful research, I found it's mainly due to two situations: First, during the break-in period of a new car or right after changing brake pads, it's common to hear squeaking sounds as the metal material needs a few hundred kilometers to smooth out the burrs. Second, after rainy or humid weather, the brake discs may rust, causing a rustling noise when starting due to friction with rust particles. I recommend driving for a while to observe first. If the noise persists for more than two weeks, it's likely due to hard brake pads or a small stone stuck in them. Last time, I found a small stone lodged in the brake pad, and after removing it with a high-pressure air gun, the noise stopped immediately. If you're not comfortable handling it yourself, a repair shop can fix it in about half an hour for just a few dozen bucks in labor costs.

[DeColin]

Buddy, I know this situation all too well, it's a common issue with the Greiz. The root cause is the brake disc material being too hard, causing the brake pads not to retract in time when starting the car cold, leading to slight friction between the two at the moment of starting. Try this method: find a safe stretch of road, accelerate to 60 km/h, and lightly apply the brakes two or three times to wear off the surface oxides. If that doesn't work, nine times out of ten it's because the brake pads are worn thin—if they're under 3 mm thick, they must be replaced. Last time I replaced mine with ceramic brake pads, the noise disappeared, and there was less dust. Also, a reminder: never use sandpaper to grind the brake discs, as this will create grooves on the surface and damage the car even more.

[SophieFitz]

Previously, I encountered many Greiz owners reporting this issue during car repairs. Actually, in most cases, it's not a serious problem, especially when the car is parked in a damp place for a few days, it becomes more noticeable. The key is to identify the type of noise: a sharp metallic screech usually indicates hard spots on the brake pads or a loose return spring; if it's a dull rumbling sound, then the brake caliper guide pins need to be checked. Here's how I suggest handling it: first, check the tightness of the wheel bolts; then observe whether the brake disc wear is even; finally, apply some special grease to the guide pins. If you're not confident in your DIY skills, I recommend going directly to a 4S shop for a brake system maintenance service, which costs around 300 yuan to get everything done.

[MacAustin]

This issue needs to be distinguished between cold and hot car states. Cold car noises are mostly due to metal corrosion. I always step on the brakes twice before starting the car in the morning, which can reduce 80% of the abnormal noises. If the noise persists when the car is hot, it needs attention—it might be the wear indicator on the brake pads rubbing against the brake disc, indicating it's time to replace the brake pads. Also, check the brake fluid level; deteriorated fluid can cause the caliper to not retract properly. Last month, I tried a little trick: buy a can of brake disc cleaner and spray it, paying special attention to cleaning the accumulated dust on the back of the brake pads. Remember, never apply grease to the brake disc—that will directly cause brake failure!

[VanColeman]

As a seasoned driver, let me remind you of three key points: First, the morning startup brake squeaking on your Greiz is normal for the first few seconds, but continuous noise while driving is dangerous. Second, thoroughly inspect the brake discs for noticeable grooves - deep ones require resurfacing. Third, low-quality brake pads are the worst; semi-metallic pads with high iron content not only squeak but also damage discs. I recommend ceramic composite brake pads - though ¥100 more expensive, they're quiet and durable. An often overlooked issue: wheel bearing failure can produce similar noises. Check by lifting the car and spinning the tire to listen for grinding sounds. For safety, get a professional full inspection at a specialized shop.