Engine whistling

[Marcos Carvalho]

A whistle appears after the engine warms up. This whistle is related to crankcase compression, because removing the oil stick, which has an o-ring, causes the whistle to disappear. It started after the IAC was changed. I checked for leaks in the IAC o-ring but it is ok. Any clue?
Rgds,
Marcos Carvalho

 

[CorollingOnTheFloor]

Sounds like a vacuum leak...

 

[CorollingOnTheFloor]

Here this might help
https://www.youtube.com/watch?v=mYa8rcHeN3A

 

[Scott O'Kashan]

Marcos - So it's been sixteen days since your post. What's the status of your car? Everyone in the Corolla Forum is curious.