What happened when the engine whined when the Odyssey started?

Reasons for engine whining at the start of Odyssey: 1, oil needs to be changed or oil viscosity does not match; 2. The engine oil does not fully lubricate all parts of the engine; 3. The engine wear clearance becomes larger; 4. The engine, throttle and spark plug have too much carbon deposit; 5. The air filter is too dirty.

The engine whines because the fit clearance is too large. Most of the reasons why cars hum at low speed or variable speed are caused by the excessive clearance between piston and cylinder wall. When the installation configuration is too tight and abnormal wear occurs during installation, buzzing will occur. The following are the solutions to abnormal engine noise:

1. Abnormal sound caused by aging or loosening of machine foot pads. Once the machine foot pad is aged or loose, the engine will shake violently and produce abnormal noise. Replace the foot pad to solve the problem;

2. The abnormal sound of "clang" is probably the phenomenon of knocking on the cylinder. Most of them are due to poor lubrication conditions and excessive wear of piston and cylinder wall, which affects the collision between piston skirt and cylinder wall when the engine is running. The engine oil does not match, just replace the engine oil;

3. The most common causes of abnormal vibration and noise of automobiles are that the throttle valve is too dirty or the fuel injector has too much carbon deposit. Need to clean the engine carbon deposit, clean the throttle, replace the oil pad and spark plug.

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