How to reduce engine noise?

1. Fire-proof and sound-proof walls can be installed in the engine room, and thermal insulation and sound-proof cotton can be installed in the engine hood.

2, the most important thing is to reduce the noise of the engine itself, clean up the engine, air intake, throttle, spark plugs, fuel nozzles and other carbon deposits.

3. Using semi-synthetic or all-synthetic engine oil (the best in synthetic engine oil, but the price is high) instead of high-performance engine oil can reduce the consumption and noise of the engine itself.

4. Adjust the idle speed to the optimum speed, and the noise will be less.

Causes of sudden increase of engine noise

1, weather reason

The cold weather causes the idle speed of the engine to rise, and the engine will always maintain a high speed when it is cold, and the engine sound will become louder. This situation is normal.

2. Improper use of engine oil

Improper use of engine oil, engine oil is also labeled, some suitable for summer, some suitable for winter. Generally speaking, the oil in summer will become sticky when used in winter, the friction of the engine will increase, and the noise of the engine will be greater.

3. Mechanical failure

The engine compartment makes a "squeak", which belongs to the loose pulley, especially when turning. The belt should be replaced.

4. Other reasons

Check the air filter, spark plug, ignition wire, gasoline, gasoline filter, gasifier, oil pump and other problems. Check whether the air filter is dirty, whether the spark plug needs to be replaced, whether the ignition coil is ready, and whether the gasoline is dirty, such as water in the oil circuit. And check the oil pump.