Automobile Engine Troubleshooting and Maintenance
Hits：1549 Date：2015/9/30
In the rapid development of the automotive industry today, vehicle maintenance technology requirements are also rising. Automobile engine is the power source of the car, its structure is extremely complex, cause of the malfunction also varied. In this paper, automotive engine common faults, combined with the experience of the actual maintenance work, make the following summary of common faults and repair methods.
First, the engine and the main reason for common faults
(A) abnormal oil consumption
Car driving, the engine oil consumption is also more than usual, with some mileage, dashboard soon showed insufficient oil volume, this is often the case because of the following three reasons: First, it may be due to sealed piston engine problems, leading to the piston and cylinder wall clearance is too large, there phenomenon of burning oil. Second, there may be serious engine parts wear, the gap between the parts is too large, leading to abnormal oil consumption. Third, individual engine lubricating oil used in non-compliance, resulting in abnormal oil consumption.
(B) the engine overheating fault
Due to the special construction of an automobile engine, in operation, prone to the phenomenon of the coolant temperature is too high, once the coolant temperature exceeds normal, the engine can not heat properly, will cause the engine to overheat, affecting the engine is working properly. Cooling system abnormalities main reasons: failure thermostat, radiator failure, the fan does not turn, tanks blockage.
(C) the engine compartment odor
Subject to high temperatures affect the engine, and its surrounding prone scorched or melted lead, emitting a pungent odor. Engine compartment smell there may be a lot of maintenance in the process of smear grease, as the engine temperature increases volatile odor generated.
(Iv) in exhaust unusual color
Car engine has failed there is little obvious manifestations, from the exhaust color anomaly analysis engine failure. Color gasoline exhaust after normal combustion should be colorless, but when hair. When motivation fails, exhaust color will change. First, the exhaust is black, it is because there is insufficient fuel oil is burned. Second, there is no fuel to burn standard, or gasoline containing water will be discharged in white exhaust. Third, when the exhaust color is blue, probably because the piston rings due to excessive wear or oil ring counterparts and other reasons, resulting in oil jump up into the engine combustion chamber, or down from the valve guide oil seepage at the participation of combustion.
Second, the engine maintenance strategy common faults
(A) control oil consumption
Engine running inevitable to consume a certain amount of lubricating oil consumption usually correspond to a certain abnormal failure of the engine. Abnormal oil consumption occurs, you should first check the oil, oil, oil change, if necessary, to avoid problems caused by oil engine can not run properly. After the removal of oil quality problems, should one investigation related parts, may be due to severe wear parts, accessories gap is too large or the oil pressure is too high, causing oil jump up into the combustion chamber. The oil leakage mainly because seals harden aging, valve stuck.
(B) timely monitoring of engine overheating
When the coolant temperature anomalies will be reported to the car dashboard Cape prompt, coolant temperature anomalies discovered, they should stop and check to see if coolant leaks. It should be noted that the hot car can not immediately shut down, the coolant can not raise immediately, but to wait for the engine temperature is normal after the operation. If the coolant lot, should troubleshoot engine thermostat, radiator fan failure. Engine overheating problem that requires motorists to master the basic knowledge and maintenance mode. To carry out regular maintenance on the engine testing.
(C) Elimination of special odor generated by the engine
Vehicles in use, if you find the engine compartment has a pungent odor or burning smell, immediately stop, check whether there are lines around the engine to soften or burn, scorch or short circuit to timely repair, to avoid further safety accident. After the exclusion of the line fault persists odor, you should consider whether or not there is attached to the surface of the engine oil, foreign matter like heat volatilization or combustion factors.
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