Oil Cap Air Sucking Noise

[Boxtaboy]

Originally Posted by S3adrag0n

Ok, just drove home, and then opened my trunk while engine still on, and took a listen. Absolutely no hissing noise from the oil cap area that I could detect. My oil cap is on tight. I did hear a little gurgling noise from the coolant tank though.

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With the oil cap off or on? Mine is sucking air only with cap off; has no CEL or smoke and drives fine. I am a bit confused myself. I hear should not be sucking air and I also hear sucking air is OK with cap off.

As my post stated, "my oil cap is on tight."

[S3adrag0n]

Mine doesn't hiss either with the cap on. Sounds like it's normal to have some air sucking with cap off: http://986forum.com/forums/boxster-general-discussions/22204-my-aos-going-post211155.html#post211155

[dja1980]

Well, I guess since a few of you have stated that your caps are silent in the fully-closed position, this confirms that I have a problem.

If/when I get the CEL again, I will get the code... I'm planning to get more driving in now that the weather is REALLY getting nice!