What Causes the Whistling Sound When Accelerating?
1 Answers
Insufficient engine oil level reduces the oil pump's output or causes it to fail to pump oil due to air intake, leading to a drop in oil pressure. Below are the relevant explanations for the whistling sound when accelerating: 1. Damaged or malfunctioning oil return valve: If the main oil passage return valve spring is fatigued, softened, or improperly adjusted, or if the sealing surface between the valve seat and the steel ball is worn or stuck by debris, the oil return volume increases significantly, causing the main oil passage pressure to drop. 2. Incorrect engine oil selection: Using the wrong or inappropriate oil can increase leakage due to low viscosity during engine operation, thereby reducing oil pressure. 3. Insufficient engine oil level: This reduces the oil pump's output or causes it to fail to pump oil due to air intake, leading to a drop in oil pressure.