Why do the automatic headlights of the Buick Excelle stay on during the day?

What Causes Belt Squealing?

The belt slips on the generator, causing intense friction and vibration between the belt and the pulley, which produces a noise at a certain frequency. Causes: The main reasons for belt slipping are belt looseness or aging. Factors that can lead to belt looseness include improper adjustment of the belt tensioner or insufficient tensioner spring force. Belt Aging: Adjust the tension of the belt tensioner. If this doesn't work, replace the tensioner. Belt aging mainly refers to the belt gradually hardening and losing elasticity over prolonged use, reducing friction with the pulley. In this case, the only solution is to replace the belt. Adjustment: If the belt is too loose, it will slip and squeal. If it's too tight, it increases the resistance of the belt drive and causes premature wear on the bearings of the generator, water pump, and air conditioner. Adjusting the proper tension of the generator belt is crucial.

19

0

Share

What Causes Fine Scratches on the Headlight Cover?

Crazing can be caused by various factors, most commonly material issues. Without maintenance, it will turn yellow over time. Here are the details: Scratch Depth: The treatment of headlight scratches depends on their depth. If the scratches are very deep, they cannot be repaired, and the entire headlight assembly must be replaced. If the scratches are not severe or deep, a specialized repair agent can be used along with a polishing machine to polish the surface of the headlight cover. Polishing Technique: Polishing requires certain skills, as it involves controlling the pressure, time, and speed of the polishing machine. Excessive pressure, prolonged time, or too high a speed can make the headlight cover more blurry or even cause it to crack. In such cases, the headlight assembly must be replaced.

19

5

Share

Where is the trunk switch of the 2021 Bora?

2021 Volkswagen Bora's trunk switch is located below the driver's door armrest, above the door storage compartment. The following is the relevant introduction of the 2021 Bora: 1. Body dimensions: The body length is 4663mm, width is 1815mm, height is 1473mm, and the wheelbase is 2688mm. 2. Power: The entire series adopts Volkswagen Group's latest generation EA211 series all-aluminum engine, offering two power options: 1.5L and 1.4TSI, matched with a 5-speed manual, 6-speed Tiptronic automatic, and 7-speed DSG dual-clutch automatic transmission.

3

2

Share

Why Can't I Shift from Third Gear to Second Gear?

The possible reasons for being unable to shift from third gear to second gear are as follows: 1. The clutch is not fully disengaged, failing to completely cut off power. Inspect the clutch; excessive clearance, deformed friction plates, or severe wear of the clutch bearing can all prevent the clutch from fully disengaging, leading to difficulty in shifting gears. Address these issues based on the specific situation. 2. Improper operation, such as inadequate coordination between hands and feet or inappropriate vehicle speed for the gear, can cause gear collision during shifting, resulting in chipped or deformed gear chamfers. Repair the chamfer if possible; replace severely damaged parts if necessary. 3. The gear oil is too dirty or too thick, causing the oil film to easily adhere to the surface of the synchronizer cone ring. In cold winters, shifting becomes difficult but normalizes as the vehicle warms up. Gear oil in the transmission is more viscous in winter, but viscosity decreases as temperature rises. High oil temperature can cause the lubricant to gum up, filling the surface and spiral grooves of the synchronizer cone ring, leading to synchronizer damage. 4. The fine threads on the inner surface of the synchronizer lock ring are worn, or the teeth are worn into a convex shape or fractured along the axial direction. Wear reduces the gap between the synchronizer lock ring end face and the gear end face, even eliminating it, diminishing friction effectiveness and impairing the synchronizer's braking function. When the gap reaches zero, the braking function is lost. Typically, the gap between the synchronizer lock ring end face and the gear end face should not be less than 0.80mm.

11

4

Share

Is it necessary to replace the CV joint boot if it's broken?

It is necessary to replace the CV joint boot if it's broken. Here are the specific details: Reason: After the CV joint boot is damaged, the grease inside the CV joint will be thrown out, and dust and dirt will enter the CV joint bearing, causing abnormal wear and even leading to the CV joint seizing. Material: The material used is thermoplastic elastomer, also known as thermoplastic rubber, which is a polymer alloy material between rubber and thermoplastic plastics, possessing the dual characteristics of rubber and plastic. Function: The purpose of the CV joint boot is to contain the grease, preventing it from leaking out and ensuring it stays inside the CV joint. Once the grease inside the CV joint is insufficient, it will cause excessive wear and premature damage to the CV joint. Repair requires replacing the CV joint, which is relatively expensive. Therefore, once you notice any damage or oil leakage in the CV joint boot, it must be replaced promptly.

10

4

Share

What is the box on top of a sedan?

The box on top of a car is a roof cargo box. Here are specific details about roof cargo boxes: 1. Purpose of roof cargo boxes: Not all items are suitable for storage inside the car, such as skis, outdoor equipment, and protective gear. If these items must be carried, they may occupy significant space, compromise interior cleanliness, or even pose safety hazards. A roof cargo box provides an alternative storage solution. 2. Advantages of roof cargo boxes: During trips, the car interior often accommodates multiple passengers, leaving insufficient space for everyone's equipment. Roof cargo boxes are popular due to their streamlined design, large storage capacity, low wind resistance, and features like theft prevention, wind protection, and dust resistance.

20

1

Share

Why do the automatic headlights of the Buick Excelle stay on during the day?

What Causes Belt Squealing?

What Causes Fine Scratches on the Headlight Cover?

Where is the trunk switch of the 2021 Bora?

Why Can't I Shift from Third Gear to Second Gear?

Is it necessary to replace the CV joint boot if it's broken?

What is the box on top of a sedan?

Should You Press the Clutch When Decelerating with a Manual Transmission?

Which foot steps on the accelerator and which foot steps on the brake in a car?

Can Electric Vehicles Be Used in Northeast China During Winter?

How many test sessions are there in one day for Subject 1?