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Pinking
If you thought that when the engine appeared sounds that did not exist before, immediately make sure everything was in order with the engine. Most often knock in the engine linked to serious failures to diagnose and resolve them will have to disassemble the engine in a garage or service. However, you can try to determine the cause of knocking yourself to decide to go to the car service driven or towed.
A WARNING If you have an automatic transmission, use towing services as well as a car equipped with automatic transmission can be towed only when the selector lever in position ?�N?� with a speed not exceeding 15 km / h and at a distance of not more than 10 km . |
Knock the crankshaft bearing - very dangerous, the engine must be stopped immediately. Knocking low tone. Tapped at the bottom of the crankcase markedly enhanced under load and increase the speed. Often it is accompanied by the appearance of pressure drop of oil (light oil pressure is almost always lit). A knock on the connecting rod bearing - very dangerous, the engine must be stopped immediately. The sound of the rhythmic, clear, metallic, medium tone. Significantly increases with the load and disappears completely when disconnecting the spark plug. Knock piston pins - dangerous; without loading the engine, drive to auto service garage or own. The rhythmic, high-pitched with a sharp metal shade, can be heard in all modes of operation of the engine and increases with increasing load on the engine. Completely lost when disconnecting the spark plug. Knock worn pistons and cylinders - non-hazardous; without impacting the strong engine, drive to auto service garage or own. Sound, as of pottery. Especially good to hear the engine is cold, as warm decreases or disappears. Knock valves - non-hazardous, takes you to the car service garage or own. Metal knock on the background of a deaf noise. Good listened to small and medium engine speed from the cylinder head above the locations of the valves. Knocking - avoiding the heavy load of the engine, drive to auto service garage or own. Voiced metallic knocks that arise, as a rule, during acceleration. The reasons - rejection knock sensor, the use of low-octane fuel, motor overload if you turn too early upshift, a significant soot formation in the combustion chambers. It is necessary to diagnose the engine management system with the help of special equipment (scanner), use a special fuel additive to remove carbon deposits on valves and combustion chambers.
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