What's wrong with the big exhaust hole of BMW x5 cold car?

It is normal for BMW x5 to have a large exhaust hole when it is cold-started, because all the oil from the cold idle engine flows back to the oil pan. The speed will be higher during cold start, so the engine noise will be higher when the cold car is just started. When the engine temperature rises, the sound will return to normal.

BMW x5 engine maintenance;

1, preheating

When the engine is cold-started, the lubricating oil such as parts will not take part in the work soon, but it needs to be warmed up for a period of time, so that the lubricating system of the engine can be fully lubricated before going on the road, which can effectively avoid the wear and tear of all parts of the engine.

2. Self-check

Any moving part of a car has its own unique sound, and the engine is no exception. When starting in a quiet state, the sound of the general engine will be dull and regular. If the engine sound is sharp or unstable, it may be an engine failure, and it should be sent to the 4S shop for repair in time.

use

Every gear of a car has its own reasonable shift speed. Generally speaking, when you reach this gear, you need to shift gears. If driving at high speed all the time, it will easily burden the engine, which will not only affect the fuel economy, but also cause the loss of engine parts.

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