What to Do When 12 Points Are Deducted?

Why does the car's water temperature rise so slowly?

The slow rise in car water temperature is caused by a damaged thermostat or the cooling fan running constantly. The thermostat operates based on the engine's water temperature. If the thermostat malfunctions and the valve fails to close, the coolant will continuously circulate in the large loop, potentially causing the engine's water temperature to remain too low. The water temperature refers to the temperature of the antifreeze, which is a coolant with anti-freezing properties. It prevents the coolant from freezing and expanding in cold winter conditions, which could crack the radiator or damage the engine cylinder block or head. The method for replacing antifreeze is as follows: 1. Open the vehicle's engine hood, and you can see the coolant reservoir in the upper right corner; 2. Open the antifreeze drain plug under the radiator to drain the old antifreeze; 3. Add new antifreeze, tighten the cap, and the antifreeze replacement is complete.

9

3

Share

What Causes the Steering Wheel to Lean Left When Driving Straight?

The reasons for the steering wheel leaning left when driving straight are as follows: 1. Inconsistent tire pressure or uneven wear on both sides of the wheels, leading to differences in wheel diameter and traction. In this case, the tire pressure should be adjusted to the standard level or the tires should be replaced. 2. Uneven wear of the tread patterns can also cause the steering wheel to lean left. 3. Damaged springs and shock absorbers, where insufficient elasticity of the springs can cause excessive compression, and oil leakage in the shock absorbers. 4. Suspension damage, deformation, or misalignment can lead to the steering wheel leaning left, causing the vehicle to pull to one side. The following are forms of vehicle pulling: 1. Braking pull: This occurs when the vehicle's direction deviates during braking. 2. Driving pull: This refers to the situation where the driver must tightly hold the steering wheel to maintain straight-line driving under normal driving conditions.

5

3

Share

What is SL Grade Engine Oil?

SL is the lowest grade of engine oil. Below is an introduction to engine oil grades: 1. API (American Petroleum Institute) classifies engine oil grades from SA to SN, etc. This label actually describes the quality of the oil. The further back the letter after 'S' is in the alphabet, the higher the quality of the oil. So far, SN is the highest grade. If the series starts with 'C', it represents diesel engine oil, with specifications including: CA, CB, CC, CD, CE, CF, CF-2, CF-4, CG-4, CH-4, CI-4. When both 'S' and 'C' letters are present, it indicates that the oil is suitable for both gasoline and diesel engines. 2. SN grade is currently the highest grade of engine oil. SJ was the standard in the 1990s, SL was the standard in 2001, SM was the standard in 2004, and SN became the standard in 2010. The best SL-grade oils are mainly semi-synthetic or mineral oils, while SN-grade oils are all fully synthetic, representing the highest standard of engine oil.

18

3

Share

Will changing the color of brake calipers pass the annual inspection?

Changing the color of brake calipers can pass the annual inspection, but it is not recommended. The following are the specific details: 1. The annual inspection may fail only if the vehicle's lighting performance does not meet the standards, the vehicle has braking faults, the vehicle's exhaust emissions do not meet the standards, or there are unresolved traffic violation records. It is important to keep the vehicle's appearance consistent with the driving license; 2. The brake caliper is a major component of disc brakes, equipped with a brake caliper piston that pushes the brake pads to contact the brake disc, generating braking force. Each wheel brake has only one caliper; 3. Depending on the number of caliper pistons, calipers are divided into floating and fixed types. Floating calipers can move axially along the brake disc, with pistons arranged on one side, typically having only one piston. Fixed calipers have pistons arranged oppositely, with an even number of pistons.

1

0

Share

Will the Engine Stall in Second Gear at Idle Speed?

When driving below 10 km/h in second gear, the engine will not stall for the following reasons. First, most vehicles have an idle speed of around 10 km/h in second gear, and the recommended speed range for second gear is between 5 km/h and 30 km/h (although higher speeds are possible, they are not ideal for the vehicle). Therefore, as long as the car is moving, it generally won't stall. However, when accelerating, it's important to use the clutch partially engaged (semi-clutch) to start, otherwise the gears may clash, potentially causing severe damage to the vehicle. Alternatively, shifting down to first gear for acceleration is the best approach. Here’s a quick guide to the speed ranges for different gears: 1. In first gear, the speed range is 0 km/h to 10 km/h. 2. In second gear, the speed range is 10 km/h to 30 km/h. 3. In third gear, the speed range is 20 km/h to 40 km/h. 4. In fourth gear, the speed range is 30 km/h to 50 km/h. 5. In fifth gear, the speed range is 50 km/h and above.

10

0

Share

What Causes the Brake to Shake?

The reasons for feeling brake shake when pressing the brake pedal are as follows: 1. The brake disc surface is uneven, with excessive radial runout. During braking, the brake pads intermittently contact the brake disc, causing fluctuating braking force and resulting in vehicle vibration, especially noticeable when lightly pressing the brake. 2. Significant deviation in wheel alignment data, particularly incorrect front wheel alignment angles or excessive toe-in. This makes the vehicle difficult to control during acceleration, with slight but noticeable discomfort while driving. 3. Tire pressure is either too high or too low. Overinflated tires cause more severe vibration at higher speeds, while underinflated tires lead to a floating sensation and pulling to one side. Specific tire-related causes of brake shake include: 1. Wheel rim deformation. When mounted on a deformed rim, the tire also deforms, leading to an uneven surface and unbalanced wheel dynamics, causing vibration while driving. 2. Abnormal tire wear. Due to incorrect wheel alignment or rim deformation, the tire surface wears unevenly, resulting in vehicle vibration during driving.

20

2

Share

What to Do When 12 Points Are Deducted?

Why does the car's water temperature rise so slowly?

What Causes the Steering Wheel to Lean Left When Driving Straight?

What is SL Grade Engine Oil?

Will changing the color of brake calipers pass the annual inspection?

Will the Engine Stall in Second Gear at Idle Speed?

What Causes the Brake to Shake?

Why is the delivery of Ora Good Cat so slow?

What are the reasons for the car starter not responding when igniting?

What are the reasons for the soft brake pedal after brake fluid replacement?

Where is the engine number of the Passat?