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What's the Difference Between a Faulty Thermostat and a Faulty Water Pump?

1 Answers

VonZoe

07/30/25 3:12am

If the thermostat is damaged, the coolant can still circulate, whereas if the water pump is damaged, the coolant cannot circulate directly. This is the key difference between the two. Below are the working principles of the thermostat and the role of the car water pump belt: Working Principle of the Thermostat: The thermostat automatically adjusts the amount of coolant entering the radiator based on the temperature of the cooling water, thereby altering the coolant's circulation range to regulate the cooling system's heat dissipation capacity. This ensures the engine operates within an appropriate temperature range. The thermostat must maintain good technical condition; otherwise, it can severely impact the engine's normal operation. Role of the Car Water Pump Belt: The water pump belt, as the name suggests, is the drive belt that enables the engine to power the water pump. While this is correct, it's not the complete picture. The component referred to as the "water pump belt" actually connects the engine crankshaft to the water pump, alternator, power steering pump, and air conditioning compressor. However, these numerous components aren't typically connected by just one belt. It's common to see two or three belts separately linking certain mechanical devices in the system. For example, one belt might connect the "crankshaft-water pump-alternator," while another connects the "water pump-power steering pump." There may also be a separate belt for driving the air conditioning compressor.

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What is the equivalent of Euro III in China's emission standards?

The Euro III emission standard is equivalent to China's National III emission standard. Generally, most new privately-owned vehicles manufactured between 2005 and 2010 were set with Euro III or National III emission standards for exhaust emissions. The National III standard mainly applies to light gasoline and diesel vehicles under 3.5 tons, equivalent to the Euro III standard, with a nationwide implementation date starting from July 1, 2007. Here is relevant information: 1. According to Announcement No. 5 of 2006 by the National Environmental Protection Administration, "Announcement on the Release of New Motor Vehicle Models and Engine Types Meeting the National Phase II and Phase III Emission Limits for Motor Vehicles," the National III standard mainly applies to light gasoline and diesel vehicles under 3.5 tons, equivalent to the Euro III standard, with a nationwide implementation date starting from July 1, 2007. 2. The National III standard represents a significant improvement, primarily emphasizing the emission standards for vehicles at -7 degrees Celsius, which is unique internationally. Another aspect is the zero-start standard for vehicles, including OBD (On-Board Diagnostics). Throughout the vehicle's use, if any emission-related issues arise, the vehicle will automatically alert the owner, who should then visit a service station for repairs to resolve the issue.

Why won't the car start immediately after being turned off?

It may be due to fuel system or power supply system malfunctions. Details are as follows: Fuel system malfunction: Some car owners frequently choose to add lower-grade gasoline to save costs. Using low-grade gasoline may lead to higher gum content in the fuel, which can clog the fuel lines, causing poor engine fuel supply and stalling. It is recommended to clean the engine's fuel lines, injectors, and other components, while also checking if the vehicle's fuel pump has any issues. Low fuel pressure: After the engine heats up, the high temperature causes fuel evaporation in the fuel lines, creating vapor lock. A fuel pressure gauge can be connected to the fuel line. If the fuel pressure is too high after starting the engine, the pressure regulator needs to be replaced. If the pressure is too low, clamp the return hose. If the fuel pressure then rises to the normal value, it indicates that the pressure regulator is damaged. Power supply system malfunction: Currently, the engine's ECU (Engine Control Unit) is extremely important. The driver's throttle commands are analyzed by the ECU to issue instructions to the engine system, such as the timing and duration of fuel injection, which require ECU calculations to execute. If the ECU malfunctions, it cannot send correct instructions to the engine, resulting in failure to start normally after stalling.

What is the ideal distance from the side line when reversing into a parking space?

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At which intersections are U-turns not allowed?

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What are the disadvantages of dual-engine cars?

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What does 'No Deductible' mean in car insurance?

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