Why is the Thermostat Prone to Failure?

1 Answers
LandonRose
07/30/25 7:10am
Due to prolonged warm-up time, electric flatbed trucks operate at lower water temperatures, causing combustion gases to react with condensed water on the cylinder walls, forming acidic substances that corrode the cylinders and lead to thermostat failure. Below is an introduction to the thermostat: 1. Device Introduction: The thermostat automatically adjusts the amount of water entering the radiator based on the coolant temperature, altering the water circulation range to regulate the cooling system's heat dissipation capacity, ensuring the engine operates within an appropriate temperature range. 2. Working Principle: The most commonly used thermostat is the wax-type thermostat. When the coolant temperature is below the specified value, the refined paraffin inside the thermostat's temperature-sensing body remains solid, and the thermostat valve, under the action of a spring, closes the passage between the engine and the radiator. The coolant then returns to the engine via the water pump, initiating a small internal circulation within the engine.
Was this review help?
8
2
Share
More Forum Discussions

What are the symptoms of a broken rear shock absorber?

The symptoms of a broken rear shock absorber include: when driving on bumpy roads, the rear wheels may produce excessive bouncing and abnormal noises when passing over uneven surfaces. The functions of a shock absorber are: 1. To buffer the movement of the vehicle's center of gravity and conserve energy; 2. To reduce wind resistance and minimize the impact of changes in the vehicle's center of gravity on the tires. The principle of a shock absorber is: when relative motion occurs between the frame and the axle due to vibration, the piston inside the shock absorber moves up and down, causing the oil in the shock absorber chamber to repeatedly flow from one chamber to another through different orifices. The friction between the orifice walls and the oil, as well as the internal friction between oil molecules, creates resistance to vibration, converting the vehicle's vibration energy into heat energy of the oil, which is then absorbed by the shock absorber and dissipated into the atmosphere.
2
0
Share

How Many Exam Attempts Are Allowed for Subject 4 Each Time?

According to the "Regulations on the Application and Use of Motor Vehicle Driving Licenses," there is no limit to the number of exam attempts for Subject 4. If the first attempt on the same day is unsuccessful, a make-up exam can be taken on-site immediately. If the make-up exam is also unsuccessful, you will need to reschedule, and no additional fees are required for the make-up exam. However, it is important to note that the validity period of the driving skills test permit is three years. If the applicant fails to complete the exams within this period, the passing scores of any previously completed subjects will be invalidated. Subject 4 consists of 50 questions, primarily in the form of case studies, images, and animations, with a perfect score of 100 and a passing score of 90. Subject 4, also known as the theoretical driving test or driver's theory exam, is part of the motor vehicle driving license assessment. After the implementation of the Ministry of Public Security's Order No. 123, Subject 3 was divided into two parts: the road test and an additional safety and civics knowledge test, commonly referred to as "Subject 4," which assesses "driving ethics." Subject 4 is the colloquial term for the safety and civics driving knowledge test under Subject 3 and is not a separate subject. Because this test is conducted after Subject 3, it is commonly called Subject 4. Officially, there is no Subject 4. The safety and civics driving knowledge test is conducted after Subject 3. Subject 4 Exam Notes: Exam Duration: The exam lasts 45 minutes. Number of Questions: Depending on the type of driving license being pursued, 50 questions are selected proportionally from the corresponding Subject 4 question bank. Question Types: The exam includes single-choice questions (including true/false questions) and multiple-choice questions, with questions presented as animations, images, scenario recognition, and text descriptions. Subject 4 Exam Tips: Strengthen Weak Areas and Identify Mistakes: For marked questions, do not just memorize the correct answer. Instead, consult regulations, textbooks, or reference materials to understand the reasoning behind the correct answer and internalize it. Categorize and Summarize Questions: Refer to the question bank analysis to group similar questions together. Many questions in the bank are similar and easily confused, so it is helpful to analyze and categorize them. For example, traffic signs for "pedestrian," "walking," "pedestrian crossing," and "caution pedestrian crossing" are visually similar and can be confusing. Grouping them during study helps avoid mistakes. Use Memory Techniques: Many questions in the bank involve numbers. Summarizing these numbers can make them easier to remember. The driving test consists of three subjects: Subject 1, Subject 2, and Subject 3, with Subject 3 divided into two parts. Subject 1 covers laws, regulations, and related knowledge on road traffic safety. Subject 2 is the field driving skills test. Subject 3 includes the road driving skills test and the safety and civics driving knowledge test.
15
0
Share

Why Walk Around the Vehicle Counterclockwise?

Because in mainland regions, the driver's compartment is on the left side, walking around the vehicle counterclockwise allows you to see oncoming traffic from behind, reducing the chance of accidents. Here are the benefits of walking around the vehicle counterclockwise: 1. Detecting foreign objects to avoid financial loss: No matter where you park your car, you cannot fully predict future scenarios. For example, there might be stones in a corner in front of the car or sharp objects like nails. Walking around the vehicle helps you observe the surroundings and avoid unnecessary damage. 2. Preventing harm to children and small animals: Timely detection of crouching children or small animals. Incidents of running over small animals are common, and there might also be children playing crouched in front or behind the car. Driving away without walking around the vehicle could lead to very serious consequences.
6
5
Share

Where is the VIN located on the GAC Trumpchi GM8?

The VIN locations for the GAC Trumpchi GM8 are: 1. On the front partition of the engine compartment; 2. On the vehicle nameplate located on the left side of the instrument panel and the central pillar of the vehicle. The VIN is a set of seventeen letters or numbers that can identify the manufacturer, engine, chassis number, and other performance data of the vehicle. The dimensions of the GAC Trumpchi GM8 are: length 5089 mm, width 1884 mm, height 1822 mm, with a wheelbase of 3000 mm. The GAC Trumpchi GM8 is equipped with a 2.0T turbocharged engine, with a maximum power of 185 kW, a maximum torque of 390 Nm, and a maximum power speed of 5250 rpm.
7
5
Share

Reasons for the Screen Staying On and Not Powering Off After Engine Shutdown?

It might have been manually turned on and thus requires manual shutdown. Below are relevant explanations: 1. Precautions: Normally, avoid pressing the buttons; keep the middle switch untouched. The light will naturally turn off after ignition and driving. If the left or right switches are manually pressed, the light must be manually turned off to extinguish. There might be a delay before the light automatically turns off after shutdown. You can enter the central console for settings after ignition. If this doesn't work, directly visit a 4S store for resolution. 2. Using an Automotive Diagnostic Tool: Utilize an automotive diagnostic tool to access the SMK system and read the data stream. If both the ACC input circuit and the battery circuit (when the engine is off) show an ON status, it indicates a current short-circuit condition. The likely cause of the short circuit could be an issue with the power supply module, necessitating prompt inspection and repair of the relay.
15
2
Share

What Does the Car Grille Mean?

Car grille mainly functions for air intake and ventilation of components like the radiator, engine, and air conditioning, preventing damage from external objects to internal parts while driving, as well as enhancing aesthetics and showcasing individuality. In automotive engineering, the grille is used to cover the body to allow air to enter. Most vehicles have a front car grille to protect the radiator and engine. More details are as follows: 1. Grille Location: In automotive engineering, the grille is used to cover the body to allow air to enter. Most vehicles have a front-mounted car grille, while other common locations include under the front bumper, in front of the wheels, at the front for cabin ventilation, or on the rear trunk lid. 2. Material: Currently, the material for metal grilles is mainly aviation aluminum as the base material, as it is lighter than stainless steel. Aviation aluminum is also cheaper than stainless steel, so many manufacturers use aviation aluminum.
10
4
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.