Solutions for the Rumbling Sound in EA211 Engine?
1 Answers
Dada abnormal noise situation and solutions: The first type: The upper part of the engine makes a dada sound. First, ensure that the oil level, oil pressure, and water temperature are normal. Then, use a stethoscope on the exhaust side of the valve cover to determine if the sound is coming from the valve cover, and the noise frequency increases with the engine speed. This situation is caused by the failure of the hydraulic tappet, and the hydraulic tappet needs to be replaced. The second type: A dada sound is heard in the middle part of the engine. First, ensure that the oil, cylinder pressure, valves, valve rocker arms, hydraulic tappets are normal, and check if there are any fault indications in the engine. Then, use a stethoscope to determine if the abnormal noise is coming from the middle part. If the sound also increases in frequency with the engine speed, the connecting rod assembly needs to be replaced, as the noise is caused by excessive clearance between the piston pin and the small end of the connecting rod. The third type: There is a metal friction sound in the front part of the engine, especially noticeable during rapid acceleration at 2000-2500 rpm. In this case, check if the turbocharger is functioning properly. If this issue is confirmed, it is necessary to go to a repair facility for inspection.