What to Pay Attention to When Buying a Used Car to Avoid Being Scammed?

How to Tell if a Spark Plug is Not Tightened?

How to tell if a spark plug is not tightened: Pull off one of the steel wires and place your right hand close to the spark plug. Start the engine; if you can feel air escaping, it means the spark plug is not tightened properly. If a spark plug is not installed correctly, it can cause the spark plug gasket to deform, leading to air leakage during engine operation, reduced power, and blocked heat dissipation channels. This prevents the heat absorbed by the spark plug from the combustion chamber from dissipating. The accumulation of heat causes a sharp rise in the internal temperature of the spark plug, burning out components such as the insulator skirt, center electrode, and side electrode. This can result in incomplete combustion, leading to carbon buildup or engine misfire. Spark plugs require proper heat dissipation, and if not tightened correctly, they won't fit tightly against the cylinder head, leading to poor heat dissipation. In mild cases, this can cause the main electrode of the spark plug to overheat, reducing its lifespan. In severe cases, it can lead to pre-ignition, knocking, or even spark plug electrode detachment, which can cause cylinder scoring. Symptoms of a damaged spark plug in a car: A damaged spark plug can exhibit the following symptoms: difficulty starting the engine, reduced power, excessive exhaust emissions, and increased fuel consumption.

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Can the vehicle green book be reissued if lost?

Yes, it can be reissued. To reissue the vehicle green book, the vehicle needs to undergo a re-inspection process, so you must drive the vehicle there, and the reissuance can be completed on the same day with the green book obtained. To reissue the green book, you need to bring the original ID card of the vehicle owner, the vehicle registration certificate, and the vehicle owner must be present in person to handle the procedure. Below are the relevant details: Regulations: According to Article 43 of the "Motor Vehicle Registration Regulations," if the motor vehicle registration certificate is lost, missing, or damaged, it falls under the category of reissuing the motor vehicle registration certificate, and the motor vehicle must also be inspected. The vehicle management office shall, within one day from the date of acceptance, confirm the motor vehicle, review the submitted proofs and documents, and reissue or replace the motor vehicle registration certificate. Notes: When applying, the motor vehicle owner shall fill out the application form, inspect the motor vehicle, and submit the identity proof. The vehicle management office shall, within five days from the date of acceptance, confirm the motor vehicle, verify the vehicle identification number imprint, review the submitted proofs and documents, and issue the motor vehicle registration certificate.

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Does repairing engine valves count as a major overhaul?

Repairing engine valves is considered a major overhaul, as valve repairs are quite complex. Here is an introduction to the relevant content: 1. Major automotive overhaul: A major automotive overhaul refers to the process where a new car or a car that has undergone a major overhaul is subjected to diagnostic testing and technical evaluation after traveling a certain distance or period. 2. Repair and replacement: It is a general term for restorative repairs that completely or nearly completely restore the vehicle's technical performance by repairing or replacing automotive parts. Below are extended recommendations for running-in after a major overhaul and for new cars: 1. Engine speed: The engine speed should not be too high; it is best not to exceed 3000 rpm. 2. Cold start: After a cold start, it is advisable to allow a warm-up period until the engine speed changes before driving. 3. Load regulations: The vehicle must adhere to the load regulations for its model, preferably not exceeding 70% of the specified load capacity. 4. Avoid sudden acceleration: Try to avoid sudden acceleration and hard braking. Hard braking can cause significant impact damage to a new engine, especially sudden acceleration, which can severely affect the running-in of new engine components, directly impacting the fit clearance between parts.

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What is the main function of seat belts in motor vehicles?

Automotive seat belts are safety devices designed to restrain occupants during a collision, preventing secondary impacts with the steering wheel, dashboard, or other interior components, as well as avoiding ejection from the vehicle which could lead to fatalities or injuries. Seat belts, also referred to as safety harnesses, are a type of occupant restraint system. The main structural components of automotive seat belts are as follows: 1. Webbing The webbing is a strap approximately 50mm wide and 1.2mm thick, woven from synthetic fibers such as nylon or polyester. Depending on its intended use, the weaving method and heat treatment are tailored to meet the required strength, elongation, and other characteristics of the seat belt. It also serves as the component that absorbs collision energy. Different countries have varying regulatory requirements for seat belt performance. 2. Retractor This device adjusts the length of the seat belt based on the occupant's seating position and body size, and retracts the webbing when not in use. 3. Anchorage system The anchorage system includes components such as the buckle, tongue, anchor pins, and anchor plates. The buckle and tongue are mechanisms for fastening and releasing the seat belt. The end of the webbing fixed to the vehicle body is called the anchor plate, the vehicle body's fixed point is referred to as the anchor, and the bolt used for fixation is known as the anchor bolt.

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Can antifreeze of the same color be mixed?

Antifreeze of different colors cannot be mixed. Different colors of antifreeze indicate different compositions. Mixing antifreeze with different compositions can cause chemical reactions, leading to antifreeze failure and sometimes even solidification. Even if the antifreeze is the same color, if it comes from different brands, the stabilizers may differ, and mixing them can reduce cooling and cleaning effectiveness. Therefore, it is best not to mix them. Ideally, use antifreeze of the same brand and color. If antifreeze is accidentally mixed, the antifreeze in the radiator must be completely drained, rinsed with purified water, and then refilled. Antifreeze typically comes in colors such as green, blue, and pink, with some having fluorescent effects. Generally, ethylene glycol is green, propylene glycol is blue, and glycerol is pink. The reasons manufacturers dye antifreeze different colors are as follows: Prevent mixing: To avoid confusion with other liquids and prevent accidental ingestion, many manufacturers add different color formulations for distinction. Easy identification of leaks: When the engine leaks, the color makes it easy to identify during inspection and repair. Safety considerations: These chemical components in the engine are toxic, so liquids like windshield washer fluid and antifreeze are dyed to prevent accidental ingestion.

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Should You Reverse into the Parking Space from the Left or Right First?

When reversing into a parking space, you should first reverse into the right space, then the left space. Here are the techniques for reversing into a parking space: 1. Reversing from the starting point into the garage: After the car enters the garage, the driver should look back at the left rearview mirror. When the entire left boundary line of the garage appears, immediately straighten the steering wheel. Stop the car when the left door handle is level with the garage's bottom line as seen in the left rearview mirror. 2. Driving from the garage to the turnaround point: Shift the car into 1st gear and drive out of the garage. When the hood of the car approaches the road boundary line, turn the steering wheel to the extreme left position, then stop when the car is straight. 3. Reversing from the turnaround point into the garage: Shift the car into reverse gear. Keep the steering wheel in the extreme left position and reverse backward. The driver should carefully observe the left rearview mirror and adjust the direction to guide the rear of the car into the garage. After the car enters the garage, the driver should observe the right rearview mirror. When the entire right boundary line of the garage appears, immediately straighten the steering wheel. Then, shift focus to the left rearview mirror and stop the car when the left door handle is level with the garage's bottom line.

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What to Pay Attention to When Buying a Used Car to Avoid Being Scammed?

How to Tell if a Spark Plug is Not Tightened?

Can the vehicle green book be reissued if lost?

Does repairing engine valves count as a major overhaul?

What is the main function of seat belts in motor vehicles?

Can antifreeze of the same color be mixed?

Should You Reverse into the Parking Space from the Left or Right First?

How Many Years Can Tires Generally Be Used?

How Poor is the Visibility of the Camaro?

What is the fuel consumption when idling with the air conditioning on?

Why does the car not cool when idling but works normally while driving?