What is the method for checking car brake pads?

[McCaleb]

Car brake pad inspection methods are: 1. Listen for sounds - when lightly applying the brakes, if you hear a metallic scraping sound like iron rubbing against iron, it indicates a problem with the brake pads that requires immediate replacement at a repair shop; 2. Check the thickness of the brake pads - new brake pads are about 1.5 cm thick. When visual inspection shows the thickness has reduced to only one-third of the original, increase inspection frequency and be prepared to replace them at a repair shop; 3. Feel the braking force - as brake pads wear thin, braking performance will be affected. Brake pads, also called brake linings, are critical safety components in a car's braking system, playing a decisive role in braking effectiveness. Brake pads typically consist of a steel plate, adhesive heat insulation layer, and friction material. The steel plate is coated to prevent rust, with the coating process monitored by SMT4 oven temperature tracking equipment to ensure quality by detecting temperature distribution during coating.

[MiguelMarie]

I usually check the brake pads by myself, basically following three steps. First, check the thickness by shining a flashlight through the wheel hub gap to inspect the brake pads. New pads are about 1 cm thick, and they need replacement when worn down to below 3 mm. Next, listen for sounds. If you hear a squeaky metal friction noise when braking while driving, it's the wear indicator alerting you to replace them. Finally, test the pedal feel. If the brake feels spongy or the travel distance is longer than before, it's likely the brake pads are worn out. I check them every 5,000 to 6,000 kilometers, especially after long trips. Recently, I noticed the left front wheel was wearing faster than the right, which turned out to be a sticky caliper, so I got it fixed promptly. Although DIY checks require some effort, they save a lot of money and, more importantly, keep you informed about your car's condition.

[MacHarmony]

Checking brake pads is quite simple. The most straightforward way is to lift the car or use a jack to stabilize it and remove the wheel. Using a caliper to measure the thickness of the brake pads is the most accurate method—new pads are around 10 mm thick, and you should start paying attention when they're worn down by half. The key is to check if both sides are wearing evenly. If one side is thicker than the other, it might indicate a stuck caliper. Also, inspect the brake discs for scratches or warping, as heavily worn discs can affect braking performance. Last time, a client's car had grooved discs, and resurfacing them only cost 200 bucks. Oh, and when replacing pads, always apply some anti-seize lubricant to the caliper guide pins—otherwise, they might seize up again in six months. It's recommended to check every 10,000 km, especially after rain, as brake pads tend to accumulate dirt and wear out faster.

[StEmiliano]

Last week was my first time checking the brake pads myself, and I was extremely nervous. Following the tutorial, I didn't need to remove the tire—just turning the steering wheel to full lock increased the wheel hub gap. Using my phone as a flashlight, I peered in for a long time but couldn't see anything clearly in the dark. Later, I discovered a little trick: using an old toothbrush to brush off the dust on the brake pads made it much clearer. I used a 1-yuan coin to compare the thickness—the coin is 1.8mm thick, and my brake pads had about 5mm left. Hearing a rustling sound, I thought it was all over, but an experienced mechanic said it was just normal friction noise. In the end, I still drove to the repair shop just to be sure, and they said I could go another 3,000 kilometers without issues. Checking it myself was quite interesting, except I got a blister from touching the hot brake disc—next time, I'll wear gloves.

[SebastianLynn]

Brake pad inspection is a matter of life and death, and should never be taken lightly. I make it a must to check every 5,000 kilometers, and it's absolutely essential before long trips. A simple method is to observe the thickness of the brake pads through the wheel hub gap—if it's below 3mm, it's a red alert. Pay attention to the brake disc surface; deep grooves or cracks are unacceptable. Last time, my neighbor had an accident because of a cracked brake disc. When the car is cold, feel the temperature of the brake discs with your hand—if one wheel is particularly hot, there's definitely a problem. Remember to also check the brake fluid reservoir level; low fluid can cause the brakes to feel soft. If you notice longer braking distances or body vibrations, don't delay—get it fixed immediately. I recommend keeping a set of simple tools in the car; a tire pressure gauge and a flashlight are enough for basic checks. Safety is no small matter—don't wait for an accident to regret it.

[Johnson]

Old drivers don't even need to remove tires to check brake pads, just two tricks. When waiting at a red light, roll down the window and listen for brake sounds - a sharp metallic noise means the wear indicator is being ground. Usually when parking, touch the wheel hub temperature; whichever wheel is noticeably hot definitely has a stuck brake pad. I always keep a vernier caliper in my car - after parking and turning off the engine, insert it through the wheel gap to measure thickness accurately. Newbies remember this number: pay attention when friction material is down to 5mm, must replace at 3mm. Once I found the right rear brake pad wearing unusually fast - turned out the caliper return spring was broken. When replacing pads, always have the mechanic resurface the brake disc contact area, otherwise new pads will squeak. Actually watching the wear indicator light is easiest, but base model cars don't have this feature.