Mastering the method of engine fault maintenance can reduce the hidden danger of driving safety, while maintaining regularly, can make the engine service life longer. The effective maintenance method can save the maintenance cost and prolong the service life of the vehicle in daily driving. If the following four situations occur in the daily running of vehicles, combined with the analysis method in this paper, can be effectively solved.

Abnormal oil digesting

When the car runs a mile, the dashboard quickly shows that the amount of lube oil is not enough. There are usually 3 reasons:

1. Probably the seal of engine piston is defective, which leads to excessive clearance between piston and cylinder wall and oil burning.

2. Maybe the engine parts are worn seriously, which makes the gap between the parts too large, and leads to the different consumption of lubricating oil.

3. the use of lubricating oil is not up to standard, resulting in abnormal fuel consumption.

Engine overheating fault

In operation, it is easy to appear that the temperature of coolant is too high. Once the cooling temperature exceeds the normal value, the engine can not normally heat, which will lead to engine overheating, affecting the normal work of the engine. The main reasons for the abnormal operation of the cooling system are: thermostat failure, radiator failure, fan non-rotation, water tank blockage, etc.

When the temperature of the coolant is abnormal, the car dashboard should stop and check to see if the coolant is leaking. It should be noted that the hot car can not stop immediately, and can not immediately add cooling fluid, but wait until the engine temperature is normal before operating. If there is a lot of coolant, the engine thermostat and fan heat dissipation should be excluded.

The engine room has peculiar smell.

Affected by the high temperature of the engine, the conductor may be burnt or coked, giving off pungent odor. It is also possible to apply a large amount of lubricating grease during the maintenance process, with the engine temperature and play the odor generated. Cars in the course of driving, found to have a pungent smell or burning smell, should immediately stop, check whether there are lines around the engine softening or burning, burning or short circuit lines should be repaired in time to avoid greater safety incidents. After eliminating the line fault, there are still odors, should be considered whether attached to the engine surface of the oil, foreign body heat volatilization or combustion and other factors. Abnormal color of exhaust gas

Abnormal color of exhaust gas

The color of automobile exhaust after normal combustion should be colorless, and engine failure, the color of exhaust will change.

1. exhaust gas is black because fuel is not fully burned. Sensors related to intake should be checked.

2. If the fuel does not meet the combustion standard, or the water content in the gasoline will discharge the white tail gas, the spark plug fault and the fuel quality should be checked.

3. The tail gas is blue, which may be caused by excessive wear and tear of the piston ring or the alignment of the oil ring, causing oil to run up into the combustion chamber, or oil seeping from the valve duct to participate in combustion. We should check the problems of spark plugs or valve oil seals. We should check them in time and replace new ones when necessary.