"wooshing" sound / lifters - 986 Forum - The Community for Porsche Boxster & Cayman Owners

stateofidleness · 05-21-2011, 10:35 AM

Figured I'd start a new thread for this one...

Here's a quick vid I took while I had the engine cover off:
http://www.youtube.com/watch?v=yNPudQRyWAo

What the hell is that slower "whooshing" sound? It's hard to hear the lifters in that video so I might try to get a better one.

I've never been around another boxster that had the engine cover off so I don't know what I'm hearing or what's normal.

EDIT: for what it's worth, this vid was taken immediately following an oil change.

Dale_K · 05-22-2011, 06:39 AM

Maybe the serpentine belt? It sounds rhythmical but with a long interval.

JFP in PA · 05-22-2011, 07:39 AM

What kind of shape is your AOS in? That kind of sound complaint is common with an AOS on the way out.

Jager · 05-22-2011, 08:47 AM

Tagging on JFP's thoughts, remove the oil fill cap while the engine is running, what happens? Does the engine idle (RPM) drop or increase?

Jager

stateofidleness · 05-22-2011, 03:23 PM

hmm i'll check the oil fill cap.

AOS just replaced about 2k miles ago.

stateofidleness · 05-22-2011, 03:48 PM

car runs like 'poo' with the cap off.. surges and hunts for idle (doesn't sound like it will die, but surges pretty low). I'll have a video in a few minutes.

the AOS recommendation sounds disappointing as I just had it replaced not too long ago. I do have an exhaust leak that I haven't pin-pointed yet though, not sure it they're related.

Is there a way to perform a "vacuum leak" test somehow, or something similar to smoking the exhaust to get a visual of the leak?

after swapping the MAF, no CEL's for 600+ miles.