Common faults and main causes of engine
(I) abnormal consumption of lubricating oil;
When a car is running, engine oil consumption more than usual, driving a mileage, the dashboard soon showed that oil shortage, such a situation is usually due to the following 3 points: first, the reason may be due to engine piston sealing problems, leading to the piston and the cylinder wall clearance large, appeared the phenomenon of burning oil. Second, may be the engine parts wear seriously, so that the gap between parts is too large, leading to abnormal oil consumption. Third, the lubricating oil used by individual engines is not up to standard, which leads to abnormal consumption of lubricating oil.
(two) engine overheating fault;
Due to the special structure of automobile engine, easy in operation, the coolant temperature is too high, once the coolant temperature is higher than the normal value, the engine can not be normal cooling, will cause the engine to overheat, affect the normal work of the engine. The main causes of abnormal cooling system are: Baotou North running heavy truck fittings, thermostat fault, radiator failure, fan not rotating, water tank blockage, etc..
(three) engine room odor;
Affected by the high temperature of the engine, its vicinity is prone to wire burning or melting, emitting a pungent odor. Engine room odor, and may be in the maintenance process of a large number of smearing grease, with the engine temperature rising volatile odor.
(four) abnormal color of exhaust gas
There is also a clear indication of whether the car engine is malfunctioning, from abnormal exhaust color to engine failure. The color of the tail gas after the normal combustion of the oil should be colorless, and the color of the exhaust gas will change when the engine fails. First, the exhaust gas is black because fuel oil is not sufficiently burned. Second, the fuel does not meet the standard of combustion, or gasoline contains water, will exhaust white exhaust. Third, exhaust color is blue, probably because of the bad piston abraded counterparts and other reasons or the oil ring, causing oil up, into the combustion chamber of the engine, or infiltration down from the valve guide the oil in the combustion.
Maintenance strategy of engine common faults
(1) control the consumption of lubricating oil;
When the engine runs normally, it will inevitably consume a certain amount of lubricating oil, and the abnormal consumption of lubricating oil often corresponds to some kind of breakdown of the engine. When lubricating oil consumption is abnormal, you should first check the oil and oil content. When necessary, replace the lubricating oil to prevent the engine from running properly due to the oil quality problem. After excluding the oil problem, you should check the relevant parts and components, may be due to serious wear and tear parts, parts clearance is too large or too high oil pressure, leading to oil on the combustion chamber. The oil leakage is mainly due to the hard aging of the gasket, the valve stuck.
(two) monitoring engine overheating in time;
When the coolant temperature is abnormal, it will be reported on the dashboard of the automobile. When the coolant temperature is abnormal, the car should be stopped to check if the coolant is leaking. Note that you can not stop immediately when, also can not immediately fill the coolant, but the engine temperature is normal after the operation. If the coolant is not enough, check the engine thermostat and fan radiator failure. Overheating of the engine requires the driver to master basic common sense and maintenance. Regular maintenance inspection of the engine
(three) eliminate the peculiar smell produced by the engine
The vehicle is in use process, if it is found that the Baotou beiben heavy truck parts engine compartment pungent odor or smell, should immediately stop, check whether the line around the engine to soften or burned, charred or short circuit to timely repair, avoid safety accidents more. After removing the line fault, there is still a bad odor. It should be considered whether there is oil, foreign substance, heat, volatilization or combustion on the surface of the engine.
(four) the exhaust smoke color abnormal troubleshooting
Baotou North rush heavy truck parts, engine start operation will have fuel combustion, will produce exhaust emissions, according to the color of the exhaust gas, can distinguish the engine part of the fault. When the exhaust gas is black, usually because the mixer is too dense, the fuel can not be completely burned, in this case check the intake related sensors. When the color of the tail gas is white, it is usually because the fuel is gasified poorly, and the spark plug is not discharged from the exhaust pipe without burning and the possibility of poor oil quality is greater. If the exhaust gas is blue, it is necessary to solve the problem of burning oil, may be spark plug or valve oil seal problems, should be promptly investigated, if necessary, replace the new parts.
summary
Mastering common engine failure maintenance methods can reduce traffic safety hazards, and do regular maintenance to make engine service life longer.