What Causes Oil on the Engine?

1 Answers
McGabriela
07/30/25 9:40am
The reasons for oil on the engine: 1. The oil filler cap is not properly sealed, causing oil to leak out; 2. Incomplete combustion of gasoline, where unburned gasoline flows down the cylinder walls into the crankcase. It is recommended to check if the spark plugs are functioning properly; 3. It may be due to aging seals, which require timely inspection and replacement of new seals or gaskets. Otherwise, excessive oil loss may occur, leading to severe faults such as bearing seizure. An engine is a machine that converts other forms of energy into mechanical energy. It can refer to both the power-generating device and the entire machine, including the power unit. Engine types include internal combustion engines, external combustion engines, electric motors, etc.
Was this review help?
1
5
Share
More Forum Discussions

Does upgrading the car infotainment system at a 4S store cost money?

Upgrading the car infotainment system at a 4S store requires payment of relevant fees. Here is an introduction about 4S stores: 1. Introduction: A 4S store, fully known as an Automobile Sales Service 4S Store, is a sales outlet that integrates automobile sales, maintenance, parts, and information services. It was introduced to China from Europe after 1998. 2. Features: 4S stores are invested in and constructed by dealers according to the standards set by automobile manufacturers. They feature unified interior and exterior designs, with enormous investments often exceeding tens of millions, offering a luxurious, grand, and comfortable environment. They are authorized to sell only a single brand of cars as specified by the manufacturer. 3. Business Scope: The 4S store model has developed extremely rapidly in China in recent years. The 4S store in the automobile industry is a business model introduced by automobile manufacturers to meet customers' service needs. The core concept of a 4S store is 'Automobile Lifetime Service Solution'.
1
2
Share

How to Use the Clutch in Subject 2?

In Subject 2, you must press the clutch pedal quickly and all the way down, and release it slowly. Below is an introduction to Subject 2: 1. Introduction: Subject 2, also known as the small road test, is part of the motor vehicle driver's license assessment and refers to the field driving skills test. 2. Small vehicle C1/C2 Subject 2 test items: include five mandatory tests—reverse parking, parallel parking, stopping and starting on a slope, right-angle turns, and curve driving (commonly known as S-curves) (some regions also include a sixth item: high-speed card collection). 3. Large vehicle A1/A2/A3/B1/B2 Subject 2 test items: include pole test, stopping and starting on a slope, parallel parking, passing a single-plank bridge, curve driving, right-angle turns, passing a width-limited gate, passing continuous obstacles, driving on bumpy roads, narrow road U-turns, as well as simulated highway driving, continuous sharp turns on mountain roads, tunnels, rain (fog) conditions, slippery roads, and emergency handling.
8
3
Share

What is the meaning of the jagged white solid line on the road?

The jagged white solid line on the road is a variable guide lane line, and the function of the guide line is as follows: 1. Road traffic markings: These are traffic signal facilities composed of various lines, arrows, text, as well as three-dimensional markings, raised road markers, and roadside contour markings painted on the road surface. 2. Road traffic markings: Their purpose is to separate motor vehicles, non-motor vehicles, and pedestrians, improve road utilization, reduce or prevent traffic accidents, and be used in conjunction with traffic signs and signals to enhance their effectiveness. 3. Types of traffic markings: There are more than 70 types of traffic markings, which can be categorized by painting method into white dashed lines, white solid lines, yellow dashed lines, yellow solid lines, double white dashed lines, double white solid lines, double yellow dashed lines, and yellow alternating solid and dashed lines, etc. 4. Classification by function: They can also be divided into roadway center lines, lane dividing lines, stop lines, yield lines, pedestrian crossing lines, diversion lines, guide arrows, and left-turn guide lines, etc. By function, they are divided into only three categories: first, guide markings; second, prohibition markings; and third, warning markings.
4
2
Share

Porsche Air Conditioning Not Blowing Cold or Warm Air?

Detailed explanations and solutions for the reasons why Porsche air conditioning is not blowing cold or warm air are as follows: 1. Refrigeration malfunction: If the refrigeration suddenly stops working, the most likely cause is frost or ice formation on the evaporator, which affects the airflow circulation, resulting in reduced air volume. While driving, the compressor is driven at high speed by the engine, providing excellent cooling performance. As the cabin temperature gradually decreases, the evaporator has no heat to exchange, preventing the refrigerant from vaporizing and returning to the compressor. This leads to liquid compression, ice formation on the evaporator, and the antifreeze protection switch tripping, causing the refrigeration to stop. Solution: Check the radiator and fan, or appropriately reduce the refrigerant. 2. Compression malfunction: If the compressor runs at high speed with the engine for an extended period, the high pressure remains excessively high, causing the overload protection switch to trip. Solution: Replace the low-pressure hose and test the refrigeration after installation.
13
1
Share

How to Tell if There Are Red Light Cameras at an Intersection?

You can use GPS or mobile navigation to check if an intersection has red light cameras. Below is relevant information about running red lights: 1. Overview of running a red light: Running a red light refers to the act of a motor vehicle violating the prohibition of passage during the red light phase at a signal-controlled intersection or road section, crossing the stop line, and continuing to drive. If you continue to rush through after the yellow light has already come on, being caught by the camera in such a case also counts as running a red light. 2. New regulations on penalties for running red lights: On October 8, 2012, the Ministry of Public Security revised and issued the 'Regulations on the Application and Use of Motor Vehicle Driving Licenses.' Violations such as disobeying traffic signal lights will see the penalty points increased from 3 to 6. Running a yellow light will be treated as running a red light, also incurring 6 penalty points and a fine.
19
3
Share

How to Adjust Car Seats for Optimal Comfort?

Here are the methods for adjusting car seats: 1. Seat height adjustment: Ensure that your horizontal eye line is slightly above the middle of the windshield. The height adjustment of the seat is primarily to adjust the line of sight, thereby affecting the visibility range in front of the vehicle. 2. Seat backrest adjustment: Mainly for comfort. There is no strict rule for adjusting the seat backrest; it should primarily be comfortable. Depending on driving preferences, the backrest angle should not be too reclined nor too upright. 3. Seat forward and backward adjustment: Adjust according to the position of the vehicle pedals. The forward and backward adjustment of the seat is mainly based on the position of the vehicle pedals. If the distance between the seat and the pedals is too large, the driver's legs will be more comfortable when extended, but the accuracy and strength when pressing the pedals will be compromised. Conversely, the legs and feet may tire more easily.
7
5
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.