Anyone else have this....

[hwkspeed]

When i drive my car and then park it turn it off,then roughly a minute later,i hear air coming out of like a valve in the engine compartment, for like 20sec then it goes away,i cannot locate were its coming from,im thinking its just a pressure release valve for exess air,anyone familiar with this

 

[SpeedAdiction20]

you sure it is air or is it the turbo wheels still spinning, I personally think it sounds cool, after you turn your car off, at least with me since I have vents in the hood, you can hear the turbo wheels slowing down, kinda neat... but turn the car on, keep the hood open, rev it a little once or twice, then turn the car off, and listen close to the turbo.. it should be the turbo spooling down, and any air might just be a little air being pushed around with the wheel still spinning..

 

[boostfreak]

^^ +1 to what he said.
i use to think the same thing when i first got my car.

 

[hwkspeed]

Nope

NOPE im 100% sure its not the turbo spooling down,it sounds like air pressure being released from somewere

 

[MSP2k3]

yes, it will only happen randomly.... heard others say it happens on their MSP's as well, its like something depressurizing, not sure what it is though

 

[SpeedAdiction20]

ya, well for me it sounds like air is depressurizing, that is actually exactly what it sounds like, but I guess if it is not coming from turbo area, then I dono, but I would bet on that's what it is, but can't really tell unless you let us know where it is coming from..

 

[chuck b]

for me, not a minute later but right after turning it off I got a whooshing sound
it was the intake manifold gasket. it also caused a faint high pitched whine at load mainly when the car was cold. it also caused a worsening idle, but no CELs.
(dealer) fixed the gasket, all issues resolved!

 

[hwkspeed]

also

also it can happen after the car is off for 2min ,i def know its not the turbo,im very familiar with that,and i cannot tell from were in the engine bay it is coming from, as i said im pretty sure its the air system depressurizing from excess air

 

[PAracer]

Perhaps it's the brake booster losing its vacuum. If i had a guess, I would say it is vacuum being released, rather than positive pressure.

 

[SpeedAdiction20]

^^ ya that makes sense, and ya if you hear any kinda of whining or anything like that while driving like Chuck said, watch out for gaskets, I had that when my turbo gasket went, and exhaust manifold was loose, but PAracer seems to have a good idea of what it could be, I don't know if it releases things like that, but would be good to find out, you have all your lines ziptied?

 

[hwkspeed]

thanks

thanks guys..ill keep a look out and eye on it