How to Remove Engine Oil Smell?

What are the precursors of timing chain failure in Roewe 350?

Roewe 350 timing chain failure precursors include difficulty in ignition when starting the car in a cold state, or obvious "clicking" abnormal noise from the engine when stepping on the accelerator pedal. If you find that the car has difficulty in ignition or the engine noise is very loud, you should check whether the timing chain of the car is faulty in time. If so, the timing chain should be repaired or replaced in time. The following is the information about the timing chain: 1. The timing chain connects the timing wheel of the engine cylinder head and the crankshaft, and cooperates with a certain transmission ratio to ensure the accuracy of the intake and exhaust time. 2. The timing chain plays a "bridge" role in the engine. Driven by the crankshaft, it transmits kinetic energy to the corresponding parts, and keeps the pistons, valves and other parts in the correct position at different steps, so that the engine can operate normally.

5

Share

How to Replace the Coolant in Zotye Damai X5 Radiator?

Steps to replace the coolant: 1. Open the engine hood and unscrew the radiator cap. 2. Turn on the drain valve at the bottom of the radiator to drain the existing fluid. After filling the radiator with coolant, start the engine to circulate the coolant in the radiator. 3. Once the operation is complete, inspect the entire radiator and pipelines for any leaks. If leaks are found, drain the coolant again, address the leakage issue, and then restart the process. Below is some information about coolant: 1. Coolant consists of 50% pure water, 40% methanol, and 10% other substances including dyes, corrosion inhibitors, and scale removers. 2. Compared to tap water, ethylene glycol is most notable for its antifreeze properties, whereas water cannot prevent freezing. Additionally, ethylene glycol has a high boiling point, low volatility, moderate viscosity that changes little with temperature, and excellent thermal stability. Therefore, ethylene glycol-based coolant is an ideal cooling solution.

7

3

Share

Why does the car shake when starting cold in winter?

Cold start shaking in cars can be attributed to the following reasons: 1. Low temperature: The engine temperature is insufficient, and both fuel and lubricant temperatures are too low. During cold starts, additional fuel injection is required to meet power demands. Larger spark plug gaps result in smaller ignition energy. Poor fuel atomization at low temperatures demands higher ignition energy. Prolonged vehicle use can enlarge spark plug gaps, reducing ignition energy and consequently affecting power performance, leading to shaking. 2. Incorrect air-fuel mixture ratio: Inaccurate fuel-air mixture ratio occurs in both open-loop and closed-loop control systems. In closed-loop controlled vehicles, the oxygen sensor's minimum operating temperature is 370°C. If the exhaust pipe temperature hasn't reached 370°C upon startup, the oxygen sensor won't function. This causes the ECU to make incorrect judgments, leading to errors in controlling the fuel-air mixture and ignition timing through actuators, thereby reducing power output and causing shaking. 3. Faulty coolant temperature sensor: The coolant temperature sensor is crucial for the ECU to determine engine operating conditions. If the engine starts at -10°C but the ECU calculates fuel injection based on 20°C conditions, the insufficient fuel quantity will naturally cause shaking.

7

0

Share

Can a Temporary ID Be Used for the Driving Test (Subject Three)?

A temporary ID can be used for the Subject Three driving test. A temporary ID holds the same legal validity as a permanent ID and can be used as a formal ID within its 3-month validity period. Therefore, there is no issue with using a temporary ID for the Subject Three test. Subject Three, which includes the road driving skills test and the safety and civilized driving knowledge test, is part of the motor vehicle driver's license examination. It is commonly referred to as the road driving skills and safety and civilized driving knowledge test. The full score is 100, with a passing score of 90. A retake is allowed immediately if failed, and if the retake is also unsuccessful, a new appointment can be scheduled after 10 days. The road driving skills test for Subject Three includes: vehicle preparation, light simulation test, starting, driving straight, gear shifting, lane changing, pulling over, passing through intersections straight, turning left at intersections, turning right at intersections, crossing pedestrian crossings, passing school zones, passing bus stops, meeting oncoming vehicles, overtaking, making U-turns, and driving at night. Key points for the Subject Three test: Starting: Close the door, fasten the seatbelt, signal left, shift to 2nd gear, honk three times, check the left rearview mirror, slowly release the clutch while accelerating, and avoid rolling backward. Going straight at intersections: Speed should not exceed 30 or drop below 20; do not cross the yellow line. Bus stops: Speed should not exceed 30 or drop below 20; do not cross the yellow line. Turning right at intersections: Signal left 3 seconds in advance; speed should not exceed 30 or drop below 20; do not cross the line. Changing lanes: Signal left 3 seconds in advance; speed should not exceed 30 or drop below 20; do not cross the edge line. Overtaking: Signal left 3 seconds in advance; speed should not exceed 30 or drop below 20; do not cross the edge line. Turning left at intersections: Signal left 3 seconds in advance; speed should not exceed 30 or drop below 20; do not cross the line. Passing school zones: Speed should not exceed 30 or drop below 20; do not cross the line or honk. Driving straight: Shift to 5th gear when speed exceeds 40; speed must remain above 40; do not cross the line. Accelerating: Shift to 5th gear when speed exceeds 40; speed must remain above 40; do not cross the line. Making a U-turn: Choose a suitable spot, signal right to move to the far-right lane, stop, signal left, shift to 2nd gear, and perform a two-forward-one-reverse U-turn without rolling backward. Pulling over: Signal right for 3 seconds before pulling over; the right wheel must be within 30 cm of the roadside line, engage the parking brake, and shift to neutral. Subject Three scoring criteria: Immediate failure for the following: Not wearing a seatbelt as required; Blocking or turning off in-car audio/video monitoring devices; Not following the examiner's instructions; Rolling backward more than 30 cm when starting; Mismatched gear and speed for extended periods, causing engine RPM to be too high or low; Failing to shift gears twice in a row while driving; Coasting in neutral while driving; Not following traffic signals, signs, or markings; Not driving at the required speed; Driving over solid center lines or lane edge lines; Driving on lane dividers for more than 15 seconds; Changing two or more lanes consecutively; Parking in no-parking zones like crosswalks or grid lines; Missing the scheduled test time. 10-point deductions for the following: Rolling backward less than 30 cm when starting; Shifting to the wrong gear when starting or driving; Not using or misusing turn signals before starting, turning, changing lanes, overtaking, or parking; Turning less than 3 seconds after signaling; Stalling the engine once due to improper operation. Vehicle preparation: Failure to walk counterclockwise around the vehicle to inspect its condition and surroundings results in failure. Immediate failure for the following during starting: Insufficient brake pressure; Starting with the door not fully closed; Starting with the gearshift not in neutral; Starting without releasing the parking brake and not correcting it promptly. 10-point deductions for the following: Starting without releasing the parking brake but correcting it promptly; Not releasing the ignition switch promptly after starting the engine. Gear shifting: Failure to shift smoothly as instructed results in failure; Mismatched speed and gear incurs a 10-point deduction. Pulling over: Parking with the vehicle over the right edge line or crosswalk results in failure; Not closing the door after exiting the vehicle results in failure; Parking more than 30 cm from the right edge line or sidewalk incurs a 10-point deduction; Not engaging the parking brake after parking incurs a 10-point deduction; Releasing the brake pedal before engaging the parking brake incurs a 10-point deduction; Not turning off the engine before exiting the vehicle incurs a 5-point deduction. Going straight, turning left, or turning right at intersections: Failure to slow down or stop to observe as required results in failure. Passing crosswalks, school zones, or bus stops: Failure to slow down as required results in failure.

1

3

Share

Where to Apply for ETC Activities?

ETC can be processed at bank branches, expressway service areas, and other institutions. To apply, the vehicle owner must provide original and photocopied versions of their valid ID card and vehicle license. If applying through a proxy, the proxy's valid ID card is also required. The photocopy of the vehicle license must include the page stamped with the most recent annual inspection seal. A credit card application form is needed to bind the ETC card. After obtaining the credit card, swipe it twice and present the POS receipt at designated outlets to receive and install the ETC onboard device for free, with no additional charges. Applicants must be between 18 and 60 years old and own a vehicle in their name. For companies or organizations, a business license (or organization code certificate) and official seal are required. ETC is an electronic toll collection system that allows vehicles to pass through toll stations without stopping. It uses microwave short-range communication between the onboard electronic tag installed on the vehicle's windshield and the microwave antenna in the ETC lane at toll stations. The system processes transactions via computer networking technology with banks for backend settlement. Below are precautions for installing ETC: Do not obstruct the driver's view; it is best to install it behind the rearview mirror: Many car models have windshields with a steep incline, which can reduce the driver's field of vision. Installing the ETC without considering this may increase blind spots. Installing it behind the rearview mirror on the right side avoids obstructing the view. Do not interfere with charging: The ETC electronic tag consumes power but generally does not require charging or battery replacement because it has a solar panel on the back for self-charging. Therefore, avoid installing it on the blacked-out areas of the windshield or where the solar panel might be blocked. Once installed, do not remove it casually: The button in the middle of the adhesive is an anti-tamper lever connected to a switch. After installation, the windshield presses the lever in. If removed, the lever will pop out, triggering the switch and locking the electronic tag, rendering it unusable. Unlocking requires visiting an ETC service point. This feature prevents multiple vehicles from sharing one device. When using ETC, note the following: The ETC transaction sensing range is 8 meters. To avoid paying for the vehicle ahead due to its faulty ETC device, maintain a distance of at least 10 meters. The ETC lane recognizes vehicles at speeds up to 20 km/h; exceeding this speed may cause the system to fail to read the device, resulting in a failed transaction. If using a debit card linked to ETC, insufficient balance will also cause transaction failure.

10

2

Share

Is it necessary to repair a faulty motor Hall sensor?

Repair is required for a damaged motor Hall sensor. Engine Introduction: An engine is a machine capable of converting various forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. Engine Working Principle: The working principles of two-stroke and four-stroke engines differ, with the majority of automotive engines being four-stroke. The working cycle of a four-stroke gasoline engine consists of four piston strokes: intake stroke, compression stroke, power stroke, and exhaust stroke.

10

3

Share

How to Remove Engine Oil Smell?

What are the precursors of timing chain failure in Roewe 350?

How to Replace the Coolant in Zotye Damai X5 Radiator?

Why does the car shake when starting cold in winter?

Can a Temporary ID Be Used for the Driving Test (Subject Three)?

Where to Apply for ETC Activities?

Is it necessary to repair a faulty motor Hall sensor?

What is the engine model of the Trumpchi GS3?

What engine is used in the new GAC Trumpchi GM8?

How to Bleed the Brakes of a Geely Emgrand EC7?

What type of suspension does the Trumpchi GS3 use?