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What Causes the Engine to Squeak?

2 Answers

StLila

07/24/25 6:45am

Car engine squeaking can be caused by the following reasons: 1. Engine misfire: When the engine misfires, the car may exhibit symptoms such as increased engine noise, unstable idle speed, and abnormal body shaking. In this case, it is necessary to check the condition of the cylinders and the operation of the spark plugs, and replace the spark plugs if necessary. 2. Improper use of engine oil: If the engine oil used is too viscous, internal components may not receive effective lubrication, leading to abnormal noises due to friction between parts. It is important to check the engine oil and follow the vehicle manual to replace it with the correct type during routine maintenance. 3. Timing belt noise: If the timing belt tension is incorrect, it can also cause abnormal noises. Adjusting the belt tension is required in this situation. 4. Short warm-up time: When the car is just started, the engine oil has poor fluidity, and some components may not receive effective lubrication. After the car has warmed up for a while and the engine temperature reaches normal levels, the noise should subside.

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McGavin

08/11/25 2:30am

I've been in this business for decades, and squeaky engines are quite common. It's often an issue with the belts, like the one driving the fan or the compressor being loose or worn out. Rubber aging can make the friction noise especially noticeable. This sound is more frequent during cold starts, and sometimes debris on the pulley can also cause squeaking. Another reason is bearing wear, such as in the alternator or water pump bearings, producing high-frequency noise—you'll need a stethoscope to pinpoint the problem. Internal components like piston rods lacking lubrication can also make noise, but that's much rarer. I've seen many car owners ignore this sound, only for the belt to snap and cause engine overheating, leading to costly repairs. I recommend you get to a repair shop ASAP to check belt tension and lubrication—don't let it escalate. Regular maintenance can prevent these issues, especially for older cars, which need extra attention.

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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?

The optimal distance between the corner of the parking space and the vehicle body when reversing is 30cm. Below are specific details about reversing into a parking space: 1. Scoring criteria: Failing to follow the designated route or sequence results in disqualification; the vehicle body crossing the line results in disqualification; failing to fully enter the parking space results in disqualification; stopping midway results in disqualification. 2. Tips: Start reversing by turning the steering wheel one and a half turns to the right. Observe the top of the wheel in the right rearview mirror; it should be about 40cm from the right line of the parking space to ensure the right side does not cross the line when reversing. Watch the left rearview mirror, and as soon as you can see the left line of the parking space, immediately turn the steering wheel half a turn back to the left and continue reversing. Observe both left and right rearview mirrors. When the solid lines of the parking space appear on both sides and the distances are approximately equal, immediately turn the steering wheel one full turn back to the left and continue reversing.

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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