What are the maintenance steps for car scratches and chassis healing?

Laguna is a mid-level car of Renault, imported, and the price is around 300,000. The total length of the car body is 4695mm, the width of the car body is 2060mm, and the wheelbase is increased to 2756 mm

Maintenance project

1 On the way to road trip, removing scratches on the car body may lead to obvious scratches and dents on the outside of the car, especially on the front bumper, because the owner is unfamiliar with the road surface or some road conditions are poor. So many car owners will paint the exterior of the vehicle. However, according to the professionals of the auto repair company, the cracks in the paint layer caused by some impacts are not very big, so most people think that the beauty of the vehicle has not been affected and turn a blind eye. In fact, the metal under the paint has begun to rust. When the owner can observe it from the outside, the metal layer inside has been seriously corroded. When reprocessing, I am afraid of hurting my bones.

2 Chassis repair Some cars will scratch the chassis during the journey, but they are often overlooked during the overhaul. Professionals said that if the chassis is abnormal, the steering wheel is shaking, and the parking position of the vehicle is oily, it means that the chassis has been damaged. This is because some parts of the chassis may be deformed after the road obstacles scratch it, especially the upper and lower arms, left and right tie rods, etc. In addition, even some slight scratches will cause slight leakage of the engine oil pan or gearbox oil pan, which are problems that the owner can't find in time through self-inspection. Therefore, it is best for car owners to do professional chassis anti-rust care or spray paint to armor the chassis once.

3 braking should be sensitive. For cars driving on the road for a long time, the braking system is prone to problems. In some auto repair shops, there are long queues of cars to check the brake system. First, observe whether the surface of the brake disc is smooth. If there are obvious grooves, it is because when the vehicle is driving on the gravel road, some fine sand and stones are stuck between the brake disc and the fender, constantly rubbing the surface of the brake disc. If the situation is serious, it will obviously affect the braking performance. At this time, you need to drive to the designated maintenance station to check whether the brake pads need to be replaced. If the brake oil level drops, immediately check the brake oil circuit for any leakage. Before checking the brake, please carefully wipe off the dust on the master cylinder to prevent the dust from falling into the oil storage tank. For cylinders without scale, keep the liquid level 6 mm from the top of the cylinder. If there is a scale, just keep the liquid level above the scale. Professionals remind car owners and friends to know some common sense of maintenance. If you do maintenance in some street shops, you should always remind maintenance personnel to repair items.

On the way to road trip, the tire pressure remained normal. Because the tire has the longest contact time with the ground and the most serious wear, it is a place that needs to be inspected. If the tire is a radial tire, the sidewall is the weakest part, because only the sidewall of the whole radial tire has no steel wire, so it must be used very carefully. If you drive at a high speed on a road with poor road conditions, the tire may hit a deep pit or other foreign objects, causing the tire to be severely squeezed and deformed between the impactor and the rim flange, resulting in yarn breakage of the tire wall cord. At this time, the air in the empty tire will push up from the broken yarn to form a bulge. If you find the tire bulging, you should replace it in time, otherwise it will easily cause a puncture when driving at high speed. Measure the tire pressure to see if it is within the normal range. If there is any abnormality, it should be inflated and adjusted in time.

Adequate oil is related to whether the engine can work normally. Therefore, when driving back to the road, be sure to check whether the engine oil is sufficient. The steps are as follows: on the premise of turning off the engine, first pull out the dipstick and wipe it with a cloth; Then plug in the dipstick again-try to plug it in, otherwise the reading will be inaccurate; Finally, pull out the dipstick and check the oil level at the end of the dipstick. If the oil level is lower or slightly higher than the low oil level, remove the oil filler cap and add oil. The amount of oil to be filled is between the low oil level and the high oil level on the dipstick. Pay attention to tighten the oil cover after refueling.

6 Coolant level should reach the standard. When the engine is cold, check the transparent coolant tank. If the liquid level is maintained between the "F" and "L" marking lines of the fuel tank, it meets the requirements. If the liquid level is at or below the "L" line, it is necessary to add coolant to make the liquid level reach the "F" line. After adding coolant, if the coolant level drops for a short time, leakage may occur. Visually inspect the radiator, hose, engine coolant filler cap, radiator and drain cock, and water pump to see if there is water flowing out. If no leakage is found, you need to drive the car to the designated maintenance station for further testing. It should be noted that in order to prevent burns, do not remove the radiator cover when the engine is still hot. 7 battery healing port after a long-distance driving, your car battery may be loose due to strong vibration, or the battery liquid may overflow. At this time, it is necessary to check whether there is corrosion outside the battery or whether the connector is loose, cracked or loose. If the battery is corroded by spilled battery liquid, it needs to be cleaned with a mixed solution of warm water and baking soda water, and the joint should be coated with grease to prevent further corrosion. If the connector is loose, the nut of the clamp should be tightened, but not too tightly, just to fix the battery in place, which will damage the battery box.

On the way to road trip, car owners like to roll down their windows and observe the scenery outside, because they are traveling in a completely unfamiliar environment. However, due to the long opening time of the window, a lot of dust has accumulated in the car, especially in the suede-wrapped parts such as carpet, roof and door trim, which are difficult to deal with. This requires a professional steam cleaner to dry clean these parts. Other parts of the carriage, such as the dashboard, are not easily polluted by dust, but the corners should also be wiped clean with rags or cotton swabs to avoid dust accumulation.

9 air refrigerant leakage inspection air refrigerant maintenance can be divided into two aspects. First of all, carefully check whether the refrigerant storage tank in the head space leaks due to collision or impact. If there is a leak, the leak must be filled and refrigerant added as soon as possible. The second situation is that there is a lot of dust in the radiator and pipeline due to the harsh environment during the trip. Although the dust in the air-conditioning pipeline cannot be directly contacted, it can be removed by directly injecting special cleaning agent into the air inlet of the air conditioner and then starting the internal circulation of the air conditioner. This cleaning agent is not corrosive, so there is no need to worry about damaging the plastic parts of the pipeline.

10 besides oily glass and water washing, can glass be maintained? Yes, glass maintenance is very knowledgeable. Not all problems can be solved by washing with clean water. For example, if the glass is stained with oil, it may be invisible to the naked eye, but the efficiency of the wiper will be greatly reduced. At this time, degreasing detergent must be used to remove oil stains.

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