I was trying to check for a boost leak this past weekend using the method in the website
http://a4mods.com/index.php?page=web...boostleak.html
I plugged the hole for the PCV return line.
When i started adding pressure to the system, i could hear what sounded like air passing through the oil (causing a sort of bubbling sound).
I had no idea if this was suppose to happen, so i immediately stopped and put everything back together.
You may ask why i am checking for a leak, well its because i just purchased the car and already fixed 2 vacuum leaks. Id like to be sure there is no other air leaks.
So if anyone has done a boost leak test, can you tell me if this is a normal sound.
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