What is the matter with the cylinder gasket?

Diesel engine gasket ablation (commonly known as cylinder gasket ablation) is a relatively common problem. Due to the different locations of gasket ablation, its manifestations are also different.

Diesel engine gasket ablation (commonly known as cylinder gasket ablation) is a relatively common problem. Due to the different locations of gasket ablation, its manifestations are also different.

JL486ZQ2 1.8T 

Diesel engine gasket burnout (commonly known as cylinder gasket blowout) is a common problem. Due to the different locations of gasket burnout, its manifestations are also different.
1. Gasket burnout between the cylinder edges of the two cylinders: At this time, the engine is running, the performance is poor, and the back-blowing is heard at idle speed. The fire or oil outage of a single cylinder can be felt in the adjacent two cylinders or work poorly;
2. The gasket burnout part is connected to the waterway: bubbles are emitted from the backwater, the water temperature rises too quickly, and the boiler often boils, and the pipe emits white smoke;
3. The gasket burnout part is connected to the channel: the oil enters the chamber, the pipe emits blue smoke, and the engine quality;
4. The gasket burnout part is connected to the outside world: the "pop, pop" sound is emitted from the damaged gasket, and the gas can be felt by moving the hand around the gasket;
5. There is water or bubbles coming out of the joint surface between the cover and the body, or oil and water occur. At this time, the gasket cannot be used for water and oil channels;
6. Measure, the gasket is burnt.

ZD25 2.5L  10101-Y3700

Pad ablation is mainly caused by the impact of hot and pressurized gas on the pad, the package mouth, the retaining ring and the asbestos board, resulting in, cooling water. In addition, some operating and assembly factors are also the cause of pad ablation.
1. The engine works at low temperature for a long time or often explodes, resulting in internal temperature pressure and gasket burning;
2. The advance angle or injection advance angle is too high, causing the internal maximum and minimum temperature to be too high;
3. Improper operation methods, such as frequent or long-term high-speed driving, cause gasket burning due to excessive temperature;
4. Poor engine or system causes engine temperature to be too high, resulting in gasket burning;
5. Poor gasket quality, internal bag at the mouth, asbestos laying or edge wrapping is not tight;
6. Cylinder head warps, body flatness exceeds tolerance, individual bolts, bolts are stretched to produce plasticity, etc., resulting in laxity;
7. When tightening the cylinder head bolts, follow the regulations. If not, the gasket sticks to the joint surface of the body and the cover, causing gas blowby to burn the gasket;
8. The plane between the upper end face of the cylinder liner and the upper plane of the body is too large, resulting in the gasket not being pressed tightly and causing burning.

G6EA 20910-3EA00