First of all you should make sure that the knock goes from the engine, and not from any other place. For this you need to stop the car with the engine running, turn off the transmission. Listen to the engine idling slightly changing the momentum. Try to remember this sound (it does not require a great ear for music). Then load the engine, turning on the first or second transmission trentes and load his brakes. Knock may increase as a result.
Movement at low speed and frequent knock, matching or multiple of the frequency of operation of the engine, clearly indicates the motor. Always look at the coolant temperature and oil pressure precisely at the moment of occurrence of knocking. This information may be needed.
The cause of the knocking can be a gap between the parts, evolving as a result of wear and tear. In this case, it appears gradually. A sudden knock talks about damage to the parts inside the engine and can be a serious problem. Problem number one is to stop the engine immediately and call a tow truck, or continue its course to the service station? The error will cost you money. Evacuation in the event of a trifle worth the money, but my own can bring the engine up to the catastrophic destruction of over a hundred meters away. In this case, the new engine is more expensive, as such damage may require major repairs, the cost of which is comparable or greater than the cost of a new engine.
With a weak knock, you can not hurry to go to the nearest HUNDRED with a good reputation. If heavy knocking is better to immediately stop the car, even in the wrong place, to enable the alarm, take the phone and call a tow truck. The possible fine is unlikely, if you turned on the emergency lights, but even he, together with tow truck cheaper than a new engine and its installation on the vehicle.
Стуки в двигателе-stuki-v-dvigatele-jpg
That no such event has occurred, when buying a new car, you need to carefully fulfill all requirements of the manufacturer for testing. Often this neglect simply because they don't know about this, rather, do not attach importance to. In the future, do not spare money for the oil. Better to change it to twenty percent more than ten or less. Your final cost will be much less. Move should start to warm the car even in the summer, especially for warm-up-speed compact motor requires only a couple of minutes in the summer and five minutes in the winter.