What Causes the Noise After Overhauling an EA111 Engine?

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The root causes are two-fold: 1. Excessive carbon deposits in the engine: This leads to reduced engine power, poor acceleration, acceleration vibration, deceleration vibration, and surging. 2. Inappropriate or contaminated engine oil: This results in excessive deposits that clog the oil filter and some fine oil passages, causing abnormal noises. Below is relevant information about the EA111: 1. Definition of EA111: EA111 is an engine model, representing an eight-valve engine, meaning two valves per cylinder. Eight-valve engines feature more mature technology, convenient maintenance, low cost, and high torque. 2. Characteristics of EA111: The most notable feature of the EA111 engine is its use of mature cross-flow cooling technology. This means coolant is transported from the water passage on one side of the cylinder block to the cylinder head of each cylinder, flowing at high velocity to the top of the combustion chamber.