whistle/hissing sound after turning ignition off

[rhock99 at epix.net (Ryan H)]

My coolant overflow tank hisses at me after the car gets nice and warm.  Can't figure out where it's relieving pressure though - thru the cap maybe.  I dunno, worth a listen.  It might just be the noise.

> 
> From: "Ryan Ruggles" <ryanruggles@uniserve.com>
> Date: 2003/08/11 Mon PM 11:53:26 EDT
> To: <scirocco-l@scirocco.org>
> Subject: whistle/hissing sound after turning ignition off
> 
> Specs:  1.8L JH w/ CIS
> 
> Lately I have been hearing this whistling/hissing sound out of the engine
> compartment after I turn off my car. ANy ideas what this could be?  Sounds
> like it's coming from the brake booster but I don't know for sure.  I have
> been having brake problems lately as well.
> 
> Ryan
> 
> 
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