How many kilometers does it take to break in a new car?
The running-in of car includes not only running-in of engine, but also running-in of gearbox and brakes. The engine break-in period is about 3000 kilometers, gearbox is basically break-in between gears, and break-in period is about 5000 kilometers, break-in time between tire and ground is shortest, 200-300 kilometers. OK. Therefore, break-in period of a new car is usually about 5,000 kilometers.
Why do new cars need to be run in?
A car is a mechanical product in which many mechanical parts work together. Due to limitation of processing accuracy and other reasons, mutual interaction between them has not reached a very smooth state. Or a car that has just undergone a major overhaul needs to be run in. This is due to mutual friction of chewing parts between different parts, so that chewing surface becomes smoother and mutual interaction is tighter. After a good break-in, overall condition of car will improve, for example, car will be more powerful, economical, less noisy and agile than before.
Precautions during break-in period
A new vehicle has been cold tested before leaving factory, but to maintain condition of mechanical system and extend its life in future, it is recommended that you carefully drive car for first 1500 kilometers. and support it step by step.
1100 kilometers, new friction brake pads have not yet reached 100% braking effect, brakes need to be strengthened, especially in first 200 kilometers, there is not enough friction in tires, so use more brakes than usual. Some effort. This also applies if you have just purchased new tires or a new brake pedal.
2. For first 500 kilometers, new tires have not yet reached grip, so when cornering quickly, you should try to avoid emergency braking.
3. The first 2500 kilometers should be driven carefully, at a speed of no more than 100 kilometers per hour and a speed of no more than 2500 rpm.
4. In first 2500-3500 kilometers, water temperature has reached operating temperature (the water temperature gauge reaches half scale), and can be gradually increased to maximum speed or maximum engine speed.
After 5,3000 kilometers of scheduled maintenance (using original engine oil), interaction between all moving parts in car has reached a state of smooth movement, and car can be driven at full performance.
An introduction to some of worst driving habits
First, they often kill steering wheel
Many of our rookie drivers often kill steering wheel when learning to reverse and move around garage. Little do they know that in this situation, booster pump is likely to fail, because booster pump is a fragile part of car. When under tension, service life of booster pump is greatly reduced.
2. Stop driving at high speed
Many drivers don't increase gear after car reaches a certain speed out of laziness and avoiding trouble. Some novice drivers even think about shifting when car is shaking when speed doesn't match speed due to inexperienced driving. At this time, load on engine was greatly increased, resulting in irreparable damage.
3. Do not slow down when passing speed bumps
In fact, not only beginners, many experienced drivers in our lives still do not slow down when passing a speed bump, or speed is not in place, which is easy to damage shock-absorbing equipment, or even cause accelerator to fall fail, which extremely dangerous. Therefore, when passing a speed bump, you must slow down and drive slowly.
4. Park on or over curb
Many car owners report that tires of a new car bulged less than a year ago. In fact, this is largely due to inattention to curb. Deformed or even broken tires can also easily cause carcass deformation, resulting in consequences that are difficult to correct.