Why Does the BMW Evaporator Leak?

1 Answers
LaLilliana
07/29/25 11:51pm
BMW evaporator leakage reasons: the evaporator itself is damaged or the sealing is poor; symptoms of evaporator refrigerant leakage include the air conditioning not cooling and a smell of automotive air conditioning refrigerant or refrigerant oil in the cabin. Evaporator concept: The air conditioning evaporator is a type of evaporator. The function of the air conditioning evaporator is to use low-temperature liquid refrigerant, which evaporates easily under low pressure, turning into vapor and absorbing heat from the cooled medium to achieve refrigeration. Evaporator principle: It relies on a fan to force the air in the storage room to flow through the cooling coils inside the unit for heat exchange, cooling the air and thereby reducing the storage temperature. Among these, the refrigerant or coolant flowing inside the coils cools the air outside the tubes through the tube walls, known as dry-type air coolers; those that spray coolant liquid directly to exchange heat with the air are called wet-type air coolers; hybrid air coolers have both cooling coils and coolant spray devices. Dry-type air coolers commonly used in cold storage can be further divided into ceiling-mounted and floor-standing types based on their installation position.
Was this review help?
17
5
Share
More Forum Discussions

Is the Green Book for Used Vehicle Transfer Inside the File Bag?

Is the Green Book for Used Vehicle Transfer Inside the File Bag? The vehicle registration certificate is commonly referred to as the automobile's "Big Green Book," serving as the legal proof of vehicle ownership, equivalent to the car's household registration. Below are the application conditions: 1. Condition One: If the motor vehicle registration certificate is lost, missing, or damaged, the vehicle owner must apply for a replacement at the registration location's vehicle management office. 2. Condition Two: Vehicle owners may authorize an agent to handle various motor vehicle registration and related matters on their behalf, except for applying for a replacement of the motor vehicle registration certificate. In cases where the vehicle owner cannot personally apply for a replacement due to reasons such as death, overseas travel, serious illness, disability, or force majeure, an agent may apply on their behalf with relevant supporting documents.
20
0
Share

How Significant Is the Impact After an Accident Vehicle Is Repaired? How Many More Years Can It Be Driven?

Based on the designed service life of automobiles exceeding 20 years, if an accident vehicle can be restored to its factory technical standards, its service life can still be quite long. Even a new car involved in an accident can typically be used normally for another eight to ten years after repairs. However, for vehicles that cannot be restored to their original technical condition, it is difficult to determine how many more years they can be used. The following precautions should be taken after an accident vehicle is repaired: 1. After the accident vehicle is repaired: It is best not to exceed an engine speed of 4000 rpm. Newly replaced parts require a certain break-in mileage and are not suitable for high-intensity operation. The vehicle speed should also not be too high. 2. Avoid overloading: A newly repaired accident vehicle is still in the testing phase. Although some data has been corrected, a certain driving mileage is required for verification. Excessive load puts significant strain on the steering and braking systems. 3. After driving a certain mileage: The vehicle should be sent to a repair shop for testing of relevant data, such as whether the tires are wearing unevenly or if the running gear is deformed. If necessary, corresponding corrections should be made.
18
3
Share

What are the test items for Manual Transmission Subject 3?

Subject 3, also known as the Road Driving Skills Test, includes fundamental test items such as vehicle preparation and starting, straight-line driving, lane changing, passing intersections, pulling over, crossing pedestrian crosswalks, passing school zones, passing bus stops, meeting oncoming vehicles, overtaking, making U-turns, and night driving. Below is an introduction to the driving test subjects: 1. Subject 1: Traffic Safety Laws, Regulations, and Related Knowledge Test. The structure and basic question types of the test database are formulated by the Ministry of Public Security, while provincial traffic management departments of public security authorities establish their own test databases based on local conditions. 2. Subject 2: Field Driving Skills Test, which includes test items such as reversing into a garage, stopping and starting on a slope, making a 90-degree turn, driving along a curve, and parallel parking. In cities like Shanghai, Subject 2 consists of nine mandatory test items: reversing into a garage, making a 90-degree turn, parallel parking, driving through a tunnel, stopping to take a card, driving along a curve, making a U-turn on a narrow road, emergency stopping, and stopping and starting on a slope. 3. Subject 4: Safe and Civilized Driving Knowledge, which tests related knowledge of safe and civilized driving.
11
3
Share

Introduction and Usage of Manual Transmission Gears

Introduction and usage methods of manual transmission gears are as follows: 1. Manual transmission: Generally consists of 5 forward gears and 1 reverse gear. Older cars typically had 4+1 gears, while some high-end models like the manual Mazda6 now feature 6 forward gears + 1 reverse gear. More gears generally allow for more flexible speed control and better utilization of the car's power, resulting in improved fuel efficiency. 2. Usage method: Shift gears according to the vehicle's speed. Normally, start in first gear, then shift to second after moving a few meters; shift to third when speed reaches above 20 mph but below 35 mph; shift to fourth when speed reaches above 35 mph but below 45 mph; and shift to fifth when speed exceeds 45 mph. This applies to standard 5-speed transmission cars. For cars with 6 or more gears, you can upshift approximately every 15 mph increase in speed. Additionally, monitor the engine RPM during shifting - the optimal time to shift is around 2,500 RPM. If you notice the vehicle shaking while driving, it indicates the engine is operating under high load at low speed, and you should immediately downshift by one or two gears according to the situation. When shifting, coordinate the clutch and throttle properly: depress the clutch fully while simultaneously releasing the throttle pedal, then quickly shift to the appropriate gear. Release your hand from the gearshift (commonly called gear lever) immediately after shifting - prolonged contact can damage the transmission lever.
14
4
Share

What are the effects of engine chain noise?

Chain noise can lead to insufficient engine power, excessive fuel consumption, difficulty in starting the vehicle, and in severe cases, engine failure. Below are the causes and solutions for engine chain noise: 1. Damaged chain components: The chain tensioner lacks tension, the timing chain is stretched, the guide chain plate is abnormally worn, or the timing sprocket is malfunctioning. Mechanical parts need to be replaced. 2. Delayed engine oil change: Engine oil is required for lubrication. If the engine oil is not changed promptly, the chain may produce noise. Simply replace the engine oil. 3. Damaged oil pump: Check if the engine oil pump is damaged, causing insufficient oil supply, which prevents the chain from receiving timely lubrication and results in noise. Replace or repair the engine oil pump.
5
1
Share

How many people can an off-road vehicle seat?

Off-road vehicles generally can seat five or seven people, with the specific number indicated on the vehicle registration certificate. The following are detailed introductions about off-road vehicles: 1. Introduction to off-road vehicles: The English name is ORV (Off-Road Vehicle), which is a type of automobile specially designed for off-road use, mainly referring to vehicles that can operate on rough terrain. 2. Characteristics of off-road vehicles: The main features include a body-on-frame construction, four-wheel drive, higher ground clearance, tires with better traction, elevated exhaust pipes, higher horsepower, and robust bumpers. Off-road vehicles not only adapt to various road conditions in the wild but also give a rugged and bold feeling. In cities, many people also enjoy driving off-road vehicles. 3. Usage of off-road vehicles: Off-road vehicles are part of the military vehicle family, most of which have certain off-road capabilities. In other words, these vehicles can operate on very poor road surfaces or in areas and battlefields where there are no roads at all. Later, to meet combat needs, a military vehicle with even stronger off-road capabilities emerged, commonly known as the military off-road vehicle.
20
2
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.