jb's audi

I have a whining noise in my engine compartment. It changes with RPM. I replaced the alternator, unhooked the AC compressor and replaced the idler arm. Only other thing I can think of is the Turbocharger or the timing belt, but I had the timing belt replace about 40k ago. Anyone else have any suggestions? Could it be cheap gas? I am going to run this tank dry and put in some 94 + octane boost or Techron.

Uki

Wouldn't be suprised if it was the turbo, does it sound like a denist drill when you hit boost?

Ray Khan

I have no codes and the car seems to be running fine. It seems to be coming from the back of the motor and towards the drivers side. I had a bad fan clutch, but I don't think the sound is coming from the front.

PracTTical

LOL @ wife comment

jb's audi

I checked the fluid level of the PS Pump. It was low and I added some but the noise is still there. Mostly at Idle. I may replace the PS Pump but I am not too sure. If I turn the wheel the noise changes through the load on the engine.
Any other suggestions?

jb's audi

I can feel/hear the boost when it's up in rpm. I shouldn't hear much from the turbo at idle. It sounds like it is on the driver's side of the engine.

Ray Khan

I've been living with it until I have time to replace the fan clutch and go get a closer look. I'm out of ideas. I just live with it for now since it doesn't affect how the car drives and my car is loud anyways.

jb's audi

I believe it is related to the water pump but it is a loud (whining) noise. I am going to put a long screwdriver on it and see if I can hear it inside the water pump. It is driving me crazy not knowing what it is!!! World Impex has got a new pump for 65 bucks so I might replace it anyways. I don't like shot-gunning components on my car but I don't know what choice I got.