What is the reason why Pajero honked when the cold car started?

Oil failure or insufficient oil pressure may lead to insufficient oil supply and lubrication of turbine bearings, increased resistance and increased friction. The rotating speed of turbine bearing is as high as 654.38+05,000 rpm, and the sound generated by this abnormal friction is similar to the whistle sound, which is as high as 654.38+05,000 rpm. It is necessary to take the car to the garage for inspection and repair.

The car honks when it accelerates, which may be caused by the loose belt of the air conditioner compressor, the working noise caused by the high-speed operation of the turbine, or the abnormal sound caused by the pulley bearing. After finding the cause of the whistle, we can solve the problem with the right medicine. The belt or bearing of the air conditioner compressor can be replaced. If it is a turbine problem, it depends on the specific problem and whether it is necessary to replace the turbine.

The looseness of compressor belt of air conditioner shows that the tightness of compressor drive belt will directly affect the use effect of automobile air conditioner. If the compressor belt is too loose, it will lead to poor refrigeration of the air conditioning system. The compressor belt should be adjusted in time. If the compressor belt slips seriously, there will be a "squeaking" noise when starting the air conditioner. At this point, the belt needs to be replaced.

Influence of belt slack of air conditioning compressor;

1, affecting the normal use of air conditioners;

2. Increase the noise of the engine;

3, affecting driving safety;

4. This will shorten the service life of compressor bearings.

The reason why the turbocharger rings is:

1, the turbocharger works on exhaust gas. When the engine speed is low, the turbine cannot be driven, and the turbine does not work, so there is no sound. When the speed reaches above 2000, the turbine starts to work, and the uphill is a low gear and a high speed, and the exhaust gas of the engine will increase to push the turbine, so it is normal for the turbocharger to have a sound.

2. The engine exhaust valve is not tightly sealed;

3. Diesel exhaust gas recirculation valve (EGR) and gasoline engine throttle valve are not tightly sealed;

4. The exhaust pipe is not tightly sealed or poorly welded.

When the supercharger is involved, or when the cold car is just started, it is normal for the supercharger to whistle slightly and there is no need to repair it. If the whistle is loud, it may be caused by the excessive clearance of turbine blades. In this case, the engine oil may burn and the turbocharger needs to be replaced.