What Causes the Engine to Make a Whining Sound Similar to Wind?

[AmaraLynn]

There are several reasons for abnormal engine noise: 1. Oil pressure: If the car has been parked for a long time, the engine oil flows back to the oil pan. During a cold start, the oil pump cannot immediately establish oil pressure, especially in the upper part of the engine. The valves do not receive sufficient lubrication, and the hydraulic lifters or mechanical rocker arms fail to operate properly, leading to abnormal noise. 2. Oil viscosity: If the engine oil viscosity is too high, it can result in insufficient lubrication during engine operation, causing friction and abnormal noise. 3. Belt aging: Aging of the engine belt groups or issues with the tensioner pulley can lead to loose belts, causing friction noise or belt slippage. If you hear a similar "squealing" noise, check the major belt groups and tensioner pulleys inside the engine, such as the timing belt, alternator belt, water pump belt, air conditioning belt, power steering pump belt, etc.