···
Log in / Register

Common Diesel Engine Failures and Their Repairs

1Answers
DePaige
07/29/2025, 06:05:20 AM

Here are common diesel engine failures and their repair methods: 1. Diesel engine exhaust valve stuck: Start steadily in low gear, wait for the RPM and power to increase before steadily climbing a slope. Maintain the correct position of the exhaust port, ensuring the angle between the exhaust port and the ground is greater than 45°. When cutting the exhaust valve guide, leave a certain internal chamfer to increase the storage capacity of lubricating oil. 2. Incorrect fuel supply from the injection pump: Open the inspection window of the injection pump and check whether the fastening screws of the gear ring are loose or detached, and whether the scribe lines on the gear ring and the drum are aligned. If there is any deviation, align and fasten them. If the fault phenomenon is alleviated but does not disappear when the fuel supply to a certain cylinder is cut off, it indicates not only that the fuel supply of that cylinder is excessive but also that other cylinders have excessive fuel supply. In this case, the injection pump should be recalibrated.

Was this review help?
117
Share
More Q&A

Will a Manual Transmission Car Stall If You Don't Press Anything?

Manual transmission cars will not stall if you don't press anything. Starting smoothly: When starting a manual transmission car, aim for smoothness. Control the clutch and accelerator properly during startup. Lift the clutch halfway (until you faintly feel the vehicle vibrate), then lightly press the accelerator. Simultaneously release the handbrake or foot brake and slowly lift the clutch. After the car starts moving slowly, drive for a while before shifting to second gear, remembering to press the clutch quickly and release it slowly. Hill start techniques: If the car frequently stalls during hill starts, it indicates poor clutch control—likely releasing too quickly. Hill starts are good for practicing driving skills. The key technique is to properly control the clutch and accelerator. Hold the clutch steadily at the halfway point, then release the handbrake and foot brake, lightly press the accelerator, and slowly release the clutch. Hill starts require precise clutch positioning—releasing too quickly can easily cause stalling.
107
Share

Does Not Using Paddle Shifters Affect the Car?

Not using paddle shifters has no impact on the vehicle's operation. The function of paddle shifters: They allow the driver to shift gears directly on the paddles without taking their hands off the steering wheel, eliminating the need to press the clutch pedal. Paddle shifters are a quick-shift device installed on cars with semi-automatic clutches. Vehicles equipped with paddle shifters: Essentially, these are all automatic transmissions with manual mode. The manual shifting function, traditionally located near the gear lever, is simply relocated near the steering wheel for more convenient use by the driver, enhancing driving operability to some extent.
116
Share

Should Seat Belts Be Used with the Upper Mounting Point Higher Than the Lower One?

Seat belts should be used with the upper mounting point higher than the lower one. Protective Function of Seat Belts: The role of a car seat belt is to instantly tighten when the vehicle collides or during emergency braking, pulling the slack out of the belt and securing the occupant firmly in the seat to prevent secondary collisions. Seat Belts Reduce Injury: Once the tension in the seat belt exceeds a certain limit, the force-limiting device will slightly release the belt to maintain stable pressure on the chest. Therefore, car seat belts serve to restrain movement and act as a buffer, absorbing impact energy and dissipating inertial forces, thereby preventing or reducing the severity of injuries to passengers.
119
Share

How Many Cylinders Does an Engine Generally Have?

Common cylinder counts for engines include 3, 4, 5, 6, 8, 10, and 12 cylinders. Under the same displacement conditions: Generally speaking, with the same displacement, the more valves there are, the better the intake and exhaust efficiency. It's like when a person is running and gets out of breath, they need to open their mouth wide to breathe. Traditional engines mostly have one intake valve and one exhaust valve per cylinder. This two-valve valve train is relatively simple, has lower manufacturing costs, and is easier to maintain. For ordinary engines that do not require high output power, two valves can provide satisfactory engine output power and torque performance. Multi-valve technology: Engines with larger displacement and higher power require multi-valve technology. The simplest multi-valve technology is the three-valve structure, which adds an additional intake valve to the basic two-valve (one intake and one exhaust) structure. In recent years, most newly developed cars by major global automotive companies have adopted a four-valve structure. In a four-valve valve train, each cylinder has two intake valves and two exhaust valves.
101
Share

Can a Dual Clutch Start in P Gear?

Dual clutch can start in P gear. Composition of Dual Clutch: The design concept of a dual clutch divides the manual transmission into two parts, with one part transmitting odd gears and the other part transmitting even gears. The power transmission is achieved through two clutches connecting two input shafts. The passive gears of adjacent gears alternately mesh with the gears on the two input shafts. By coordinating the control of the two clutches, it is possible to change the transmission ratio without cutting off the power, thereby shortening the gear shifting time and effectively improving the quality of gear shifting. Function of P Gear: P gear is the most common gear in automatic transmission models, usually located at the foremost position of the gear shift console, in front of the R gear. Its purpose is to lock the axle when the car is stationary on a slope through the gear position.
117
Share

Should You Turn on the Heat or Air Conditioning When It Fogs Up on a Rainy Summer Day?

On rainy summer days when it fogs up, you should turn on the air conditioning. Air convection: If the fog is not too heavy, you can also slightly open both windows to allow air convection. This eliminates the temperature difference on both sides of the windshield, making it difficult for fog to form. Turn on the defogging function: To remove fog from the glass on rainy days, you can turn on the defogging function. The air conditioning system will then blow a strong airflow onto the front windshield, and the compressor will automatically turn on, blowing cold air to quickly reduce the temperature difference. Electric heating wire: The rear windshield defogging uses an electric heating wire instead of blowing air. This is because glass with electric heating wires is more expensive and costly. Since the front windshield is more prone to damage compared to the rear windshield, electric heating is generally only used for the rear windshield.
101
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.