The reasons for the cracks in the cylinder block cylinder head include both unreasonable structure, data manufacturing process problems, as well as improper use protection.  the perspective of operation protection, the specific measures to prevent cracks in the cylinder block cylinder head include the following:

1. Do overload the engine for a long time. Because this will cause excessive thermal stress on the cylinder.

2. When the engine is in a high temperature condition, do add cold water suddenly. If the engine is found to be short of water, it is necessary to make up for the cooling water after the temperature of the engine drops, to prevent the crack between the cylinder the water temperature being too large; before starting the engine, sufficient cooling water should be added to prevent the water shortage starting add cold water after the temperature rises.

3. The scale in the water jacket should be removed in time. Excessive scale will only reduce the cooling water passing area, but also reduce the heat dissipation function of the engine because of the poor heat transfer of scale. Especially when the water channels between the cylinders the valve seats are blocked, the heat dissipation function will be greatly reduced, so that some operating temperatures will increase, the thermal stress will be too large cracks will appear.

4. After the engine is started, it cannot be run at high speed immediately to prevent the crankshaft oscillating adding the load of the cylinder, which causes cracks in the weak parts.

5. Reasonable use of acceleration pedals. At any time, it is necessary to prevent sharp oil bombardment; when the car accelerates, the throttle should be opened too fast too slow; the driving should be operated to accelerate the pedal to properly adjust the power of the engine to prevent the engine operating at high speed overload for a long time. .

6. During outdoor parking at night during the winter season, it is necessary to drain the cooling water; when the engine is easy to start, warm the water to preheat it before launching; for a longer period of temporary parking (generally more than 2h), the cooling water should also be placed If it does drain, it should be started, the initiator should be kept at a certain temperature. If antifreeze that meets the requirements has been used, it is another matter.