How to Revive a Car Battery That Has Been Sitting for a Long Time?

What are the symptoms of a blown engine cylinder head gasket?

Failure manifestations after the cylinder head gasket is blown: Due to different locations of the gasket damage, the symptoms of failure vary. If the engine cylinder communicates with the cooling water jacket or the lubricating oil passage, yellow-black oil foam will float on the upper surface of the coolant in the radiator, or there will be obvious water in the oil pan. When these two types of gas channeling are severe, the exhaust will contain water or engine oil. In addition to the above phenomena, there are also the following symptoms: 1. Bubbles appear: High-pressure gas from the gas-oil passage enters the lubricating oil passage connected between the engine block and the cylinder head. The oil temperature in the oil pan remains high during engine operation, the oil viscosity becomes thin, the pressure decreases, and the oil deteriorates quickly. The oil sent to the valve train in the upper part of the cylinder head clearly contains bubbles. 2. Insufficient power: Gas channeling between two adjacent cylinders. Without opening the decompression, when turning the crankshaft, it feels like the pressure in both cylinders is insufficient. When starting the engine, there is a phenomenon of black smoke, the engine speed drops significantly, and the power output is insufficient.

7

1

Share

How to Reset the Maintenance Light on the Excelle?

Method to reset the maintenance light on the Excelle: 1. Turn on the ignition; 2. Press the "MENU" button on the control stalk; 3. Use the adjustment wheel to switch and select the "Vehicle Information Menu"; 4. Rotate the adjustment wheel to select "Oil Life"; 5. Press and hold the "SET/CLR" button for several seconds; 6. The dashboard display will show 100% oil life, indicating a successful reset. The Buick Excelle has a body size of 4609mm in length, 1798mm in width, and 1486mm in height, with a wheelbase of 2640mm. In terms of power, the vehicle is equipped with two drivetrain combinations: a 1.3T dual-injection turbocharged engine paired with a 6-speed DSS intelligent dual-clutch transmission, and a 1.0T dual-injection turbocharged engine paired with a 6-speed DCG intelligent dual-clutch transmission.

19

3

Share

What are the reasons for not smoothly shifting gears?

The specific reasons for not smoothly shifting gears: 1. Premature commands: Shifting gears before the voice prompt. 2. Too fast shifting: Generally, when passing through neutral gear, a slight pause (about 0.5~1 second) is needed to allow the computer to sense the gear passing through neutral. If the operation is too fast, neutral gear usually cannot be sensed. Below are specific introductions to gear selection in different road conditions: 1. Uphill: This type of road requires high torque intervention, so you can use "D-" to downshift. However, sometimes when the power is sufficient, you also need to use "D+" to upshift to prevent power waste and damage to the engine and transmission. When encountering steep slopes, even after downshifting, the vehicle may still lack power. In this case, use the S gear (sport mode). 2. Downhill: Use "D+" to shift up to D2 or D3 gear, which can restrain the engine to achieve a braking effect. Generally, 2-3 gears are sufficient for moderate slopes, but when encountering steep slopes, pay attention to switching to 1st gear. If the vehicle starts to slide faster, use "D-" to downshift and control the vehicle.

4

5

Share

How often should BMW spark plugs be replaced?

BMW spark plugs generally need to be replaced every two years or 40,000 kilometers. If spark plugs are not replaced for a long time, it may cause various issues such as leakage in the vehicle's ignition system, increased fuel consumption, reduced power, and most importantly, difficulty in ignition, affecting the normal use of the vehicle. Spark plug replacement interval: Under normal maintenance conditions, spark plugs should be replaced after driving 40,000 to 60,000 kilometers. However, this may vary depending on the brand and engine, so it is recommended to follow the user manual. The following standards can be used as a reference for maintenance and replacement: platinum spark plugs should be replaced at 40,000 kilometers, ordinary nickel alloy spark plugs at 20,000 kilometers, and iridium spark plugs at 60,000 to 80,000 kilometers. Steps for replacing spark plugs: Open the hood and lift the engine's plastic cover. Remove the high-voltage distributor wires and mark each cylinder's position to avoid confusion. Use a spark plug socket to remove the spark plugs one by one. While removing them, check for any external debris such as leaves or dust and ensure they are thoroughly cleaned. Place the new spark plugs into the spark plug holes and hand-tighten them a few turns before using the socket to tighten them further. Reinstall the removed high-voltage distributor wires in the correct firing order and secure the cover.

5

1

Share

What are the reasons for abnormal noise when the BMW 5 Series air conditioner is turned on?

BMW 5 Series air conditioner makes abnormal noise due to damaged car air conditioner compressor, blocked air conditioner vents, worn fan blades, or engine noise. Reasons for abnormal noise when the BMW 5 Series air conditioner is turned on: Damaged car air conditioner compressor. There are many reasons for car air conditioner compressor failure, including lack of lubrication, worn shaft, inability to compress air normally, or air leakage. When the air conditioner compressor has problems, the car's air conditioning system will produce noise or fail to cool. In this case, it is necessary to go to a repair shop or 4S store for professional inspection. Blocked air conditioner vents. The solution to abnormal noise caused by blocked air conditioner vents is very simple. Just clean the air conditioner vents immediately. It should be noted that the car air conditioner filter must also be cleaned and replaced regularly. Generally, the car air conditioner filter should be cleaned every 5,000 kilometers. Worn fan blades. If the fan blades are worn, the fan bearings lose lubrication, or the fan blades are stuck by foreign objects, the car air conditioner will make a rattling noise. In this case, the fan blades need to be removed for careful inspection. Engine noise. If the engine belt is loose or makes noise for other reasons, it may be mistaken for air conditioner noise. In this case, the engine needs to be carefully inspected to find the cause and then repaired.

15

2

Share

What is the difference between upgrading a license and directly applying for one?

The main differences between directly applying for a B2 license and upgrading to a B2 license are that upgrading requires taking the test twice and paying two fees. Directly applying for a B2 license means you do not need to pay the C1 application fee. Additionally, upgrading from C1 to B2 requires that the C1 license has been held for at least one year, with no more than 12 penalty points, no speeding violations, no drunk driving, or other major violations before applying for the B2 upgrade. Differences between C1 and B2 licenses: 1. Age requirement for application: C1 can be applied for at 18 years old, while B2 requires the applicant to be at least 21 years old. 2. Types of vehicles allowed to drive: C1 permits driving the following vehicle types: C1 small cars; C2 small automatic transmission cars; C3 low-speed trucks; C4 three-wheeled cars. B2 permits driving the following vehicle types: B2 large trucks; C1 small cars; C2 small automatic transmission cars; C3 low-speed trucks; C4 three-wheeled cars; M wheeled self-propelled machinery. 3. Location for application: C1 can be applied for at any city's vehicle management office. B2 must be applied for at the vehicle management office in the applicant's registered residence location.

17

3

Share

How to Revive a Car Battery That Has Been Sitting for a Long Time?

What are the symptoms of a blown engine cylinder head gasket?

How to Reset the Maintenance Light on the Excelle?

What are the reasons for not smoothly shifting gears?

How often should BMW spark plugs be replaced?

What are the reasons for abnormal noise when the BMW 5 Series air conditioner is turned on?

What is the difference between upgrading a license and directly applying for one?

How often should a vehicle undergo inspection?

What is the problem when the steering wheel makes noise at full lock?

What are the differences between the Middle East version and the China version?

Is it troublesome to renew a driver's license that has been expired for one month?