What to do if the diesel engine is still: Common fault analysis and solutions
As an important source of power, diesel is widely used in agricultural machinery, ships, generator sets and other fields. However, diesel engines are inevitably malfunctioning during operation, and "unable to start" is one of the most common problems. This article will combine popular topics and hot contents on the entire network for the past 10 days to analyze the possible reasons and solutions for diesel engines to stop moving.
1. Common reasons why diesel engines cannot start
| Fault Type | Specific performance | Possible Causes | s
|---|---|---|
| Startup system failure | Starting motor does not rotate or speed is too low | Battery power is insufficient, line contact is poor, and starter motor is damaged |
| Fuel system failure | No smoke or white smoke in the exhaust pipe | Insufficient fuel, blockage of oil circuit, failure of fuel injector, blockage of fuel filter |
| Compression system failure | Blue or black smoke comes out of the exhaust pipe | Inadequate cylinder pressure, wear of piston ring, poor valve sealing |
| Cooling system failure | The engine is overheated | Insufficient coolant, water pump failure, radiator blockage |
| Electrical system failure | The dashboard has no display or the fault light is on | Sensor failure, ECU damage, line short circuit |
2. Check if the diesel engine cannot be started
1.Check the startup system: First, confirm whether the battery voltage is normal (usually it should be kept above 12V), check whether the electrode connection is firm, and observe whether the starting motor is running strongly.
2.Check the fuel system: Confirm whether the fuel tank has enough fuel, check whether the fuel filter is blocked, and try manual pumping oil to see if the oil circuit is unobstructed.
3.Check the compression system: Remove the fuel injector and use a pressure gauge to measure the cylinder compression pressure (normal value is generally between 25-35bar).
4.Check the electrical system: Use the diagnostic instrument to read the fault code and check whether the signals of each sensor are normal.
3. Recent hot cases of diesel engine failure
| Case number | Fault phenomenon | Solution | Repair costs |
|---|---|---|---|
| 2023-001 | Difficulty in starting a cold car | Replace the preheating plug | 300-500 yuan |
| 2023-002 | Turn off the fire immediately after starting | Clean the fuel pump | 800-1200 yuan |
| 2023-003 | Black smoke comes out of exhaust pipe | Adjust fuel injection timing | RMB 500-800 |
4. Suggestions for preventing diesel engine failure
1.Regular maintenance: Replace engine oil, filter, fuel filter, etc. according to the maintenance cycle recommended by the manufacturer.
2.Use qualified fuel: Choose high-quality diesel from regular gas stations and avoid using inferior fuel.
3.Pay attention to daily checkups: Check whether the level of engine oil, coolant, etc. is normal before each use.
4.Correct operation: Preheat first when starting cold to avoid long-term idle operation.
5. Professional technical support channels
| brand | Service hotline | Official website |
|---|---|---|
| Weichai | 400-618-3066 | www.weichi.com |
| Yuchai | 400-887-6789 | www.yuchaidiesel.com |
| Cummins | 400-818-1190 | www.cummins.com.cn |
Through the above analysis, I believe you have a comprehensive understanding of the failure of diesel engines. When encountering problems, it is recommended to conduct a gradual investigation in accordance with the principle of "simple to traditional". If it cannot be solved by yourself, you should contact professional maintenance personnel in a timely manner to avoid causing greater losses.
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