What Causes the Whistling Sound During Turbocharger Acceleration?
1 Answers
The reasons for the whistling sound from the turbocharger are as follows: 1. The turbocharger operates by being driven by exhaust gases. When the engine speed is low, it cannot drive the turbo, so the turbo does not work and produces no sound. When the speed exceeds 2000 RPM, the turbo starts working. During uphill driving, the engine operates at low gear and high speed, and if the accelerator is pressed without load, the exhaust gases increase, driving the turbo and causing the turbocharger to produce sound. This is a normal phenomenon. 2. The engine exhaust valve is not tightly sealed, leading to blockage. 3. The diesel engine's exhaust gas recirculation valve (EGR) or the gasoline engine's throttle is not tightly sealed. 4. The exhaust pipe is not tightly sealed or has weld cracks. Additional relevant information: It is normal for the turbocharger to produce a slight whistling sound when it engages or during cold starts. No repair is needed. However, if the whistling sound is loud, it may be due to excessive clearance in the turbo blades, which could lead to oil burning. In such cases, the turbocharger may need to be replaced.