Fault Diagnosis and Removal of Engine Cylinder Gasket Ablation 5
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First aid measures for ablation on the way of the cylinder head gasket
When the cylinder head gasket is found to be burnt and damaged during driving, and there are no spare parts, the following first aid measures can be taken: Remove the cylinder head gasket and check carefully, if a small hole is damaged.
The tin foil in the cigarette case, tin platinum or asbestos thread in waste electrical appliances can be used to make up the damaged area, and it can be carefully tapped and compacted; if the damaged surface is large, dry cowhide pad or waste cylinder pad can be used Cut out a piece of subsidy to replace the part, and repair it according to the technical specifications after the vehicle returns to the field.
Use and maintenance of cylinder head gasket
In use, the cylinder gasket should have sufficient strength under the action of high temperature and high pressure gas, and it is not easy to be damaged; it must also have heat resistance and corrosion resistance; it has certain elasticity, can compensate for the flatness of the joint surface, and has good sealing; disassembly and assembly Convenient non-stick cylinder and long service life. At present, asbestos cylinder gaskets are widely used, and their structure is asbestos sandwiched with metal wires, copper skin around the water hole, and copper skin in the combustion chamber hole to prevent high temperature ablation.
When installing and maintaining, pay attention to the following matters:
() Removing the cylinder head swing bolt and replacing the cylinder gasket must be carried out after the engine is completely cooled to avoid deflection and deformation of the cylinder head.
() Check whether the surface of the cylinder head gasket is dented, bulged, damaged, etc.; check whether the flatness of the cylinder head and cylinder body meets the requirements, then clean the cylinder head gasket, cylinder head and cylinder block, and dry them with high-pressure air to avoid dirt affect sealing.
(3) The selected cylinder head gasket must be the original parts with reliable quality that meet the requirements (specification and model), and pay attention to its up and down direction marks during installation to prevent reverse installation and avoid human failure.
() Tighten the cylinder head bolts according to the technical specifications. Since the center is symmetrically expanded and crossed at both ends, screw it to the specified torque in 2 to 4 times; and then tighten it in the hot car state - one time is more reliable.
(5) The bolts of the cylinder head are corroded and cannot be removed. Do not use iron tools to pry hard to avoid damage to the cylinder head. You can inject kerosene into the screw holes of the cylinder head and soak for a while, and then the cylinder head can be removed smoothly.
(6) Improper storage of the cylinder head, careless disassembly and assembly, damage and deformation of the cylinder gasket, and improper cleaning during installation will lead to poor work and poor sealing, resulting in human failure. Attention must be paid to it.
Summarize
Cylinder head gasket is the most important kind of gasket in automobiles. In the operation of replacing cylinder head gasket, it is necessary to operate patiently, meticulously and strictly in accordance with technical standards, especially in strict accordance with the order, tightening torque and tightening method specified by the engine manufacturer. Tighten the cylinder head bolts. Only in this way can the high-quality sealing of the cylinder head gasket be guaranteed. At the same time, it is necessary to analyze the reasons for the ablation of the cylinder head gasket, eliminate related faults in a targeted manner, improve the operation method of the equipment, and avoid brutal operation, so as to effectively prolong the service life of the cylinder head gasket.
