Hello Everyone, I am trying to figure out the source of noise that the car is making, I removed the serpentine belt and the noise is still there.
Things I have changed till now
1. OEM valve cover gasket
2. All pulleys, belt and tensioner
3. crankcase ventilation hose

But the noise is still there even at cold and hot start and is consistent and doesn't increase with speed. The car doesn't throw any codes. Please help me diagnose this. I also have access to INPA, but not sure what to check. I am attaching the links to the video. Thanks in advance.

Cold start -

You Tube

After driving for a while -

You Tube

 

Just to double check did you remove the a/c belt also? If you removed both belts I would perform a smoke test

 

My car has only one belt, I removed that. Yeah smoke test is the next thing I will do. It idles good so didn't think about the air leaking issue. But, let me try that too, thank you for your suggestion.

 

Just did the smoke test after removing the air intake and without running the car. I don't see smoke coming out from anywhere, so not sure if there is any air leak. I didn't start the car though. Should I run the car while doing a smoke test?

 

You perform it with the car off. To me it sounds like something with the PCV system.

 

Thanks for suggestion, On my car, If I am not wrong the PCV valve is a part of Valve cover, I did change that. I am like out of ideas hehe. But anything you can think of helps. Thank you.

 

sounds to me like either the PCV membrame ( check with engine running if you have a vacuum) if you dont have vaccum then your membrame is shot. or it could be a vacuum leak somewhere

 

thank for suggestion, Just ran the car and opened the oil cap, there is vacuum, but not super strong. Is there any other way of doing smoke test. I removed the air filter box and used Autoline Pro smoke machine to do the test.