Diesel engine gasket ablation (commonly known as cylinder gasket flushing) is a relatively common cause. Due to different parts of the gasket ablation, its performance is also different.
1. Ablation of the pad between the cylinder rims of the two cylinders: At this time, when the car is running, the performance is poor, you hear blowback when idling, and a single cylinder cuts off the fire or oil and you feel that the adjacent two cylinders or work poorly;
2. The ablated part of the pad is connected to the mouth of the water channel: bubbles appear in the reverse water, the water temperature rises too fast, the pot is often opened, and white smoke is emitted from the pipe;
3. The ablated part of the pad is connected to the channel: the oil flows into the room and participates, and the tube emits blue smoke, which is an organic matter;
4. The ablated part of the pad is connected to the outside world: there is a "pop, pop" sound coming from the damaged part of the pad, and you can feel the gas rushing into your hands by moving your hand around the pad;
5. If there is water or bubbles coming out of the joint surface between the cover and the body, or oil and water occur, it will be a cushion at this time, and there will be no water channel or oil channel;
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6. Measurement, pad ablation.
Pad ablation is mainly caused by the impact of warm-pressure gas on the pad, bag mouth, retainer and asbestos board, and cooling water. In addition, some operating and assembly factors are also responsible for pad ablation.
1. The machine is operated for a long time or deflagrates frequently, causing internal temperature pressure and ablation of the pad;
2. The advance angle or the injection advance angle is too high to make the inner temperature reach the maximum;
3. Improper operation methods, such as frequent or long-term driving at high speed, due to the ablation of the pad;
4. The machine is defective or the machine temperature is too high, resulting in pad ablation;
5. The quality of the pad is poor, the bag inside the bag mouth is not tight, and the asbestos laying or wrapping is not tight;
6. The cylinder head is warped, the body flatness is out of tolerance, and individual bolts and bolts are stretched to produce plasticity, etc., resulting in laxity;
7. When tightening the cylinder head bolts, operate according to the regulations. If not, the pad will stick to the joint surface of the body and the cover, causing blowby gas to ablate the pad;
8. The upper end surface of the cylinder liner is flush with the upper surface of the body, causing the gasket to fail to be compressed and causing ablation.
When we replace the cylinder gasket, we must operate according to technical standards, disassemble the cover and ancillary parts carefully, and carefully check the condition of each component. When installing the cylinder gasket, we must follow the order, tightening torque and torque specified by the engine manufacturer. Tighten the cylinder head bolts using the tightening method. Only in this way, quality, can prevent the cylinder gasket from burning again
