Menu toggle

Am I hearing things?

Steve Brookes

Steve Brookes

Moderator
Standing outside the car today with the engine idling the sound of air rushing through the intake sounded a little bit louder than normal. I'm wondering if I've sprung a vacuum leak or if I've just not noticed it before? The only events leading up to this is that I took off and replaced the blower and ducting last weekend.

If anyone can let me know what sort of 'air sound' they get in the engine bay, I would be most grateful. I'll try and get a sound clip this weekend incase that helps.
 
what was your weather like at the time.... damp air sounds different.

I get more popping in this weather.
 
ORIGINAL: demonfish

what was your weather like at the time.... damp air sounds different.

I get more popping in this weather.
Click to expand...

Must admit that the effect of humid air yesterday had crossed my mind and was making me paranoid. Will be taking a sound clip shortly.
 
Here's the sound clip:

engine noise

It's the sound of air being sucked into the engine that suddenly sounded odd...however it doesn't sound as loud as yesterday [&:]. It would be good to know from others if their's sounds similar.
 
Steve,

It definitely sounds strange - as you say, a vacuum leak or a gap in the induction tract. It sounds a bit I'd imagine it would sound with an open air filter. Does it sound more "roarty" when you accelerate??

Regards

Dave
 
Idles lovely (just did an oil change and had it idling for 15 minutes while waiting for thermostat to open and it didn't miss a beat). Seems as powerful as normal and no roaring or extra induction noise.

There's a split that has developed in the duct shroud but that doesn't seem to be the cause (no change when I cover it with my finger). And couldn't find any loose hose clamps.

So so far we're saying that noise of moving/sucking air is louder than others hear?
 
I took the right side intake manifold off today and had a root around looking for loose/split hoses and thought I'd found it when I found oil seeping from the rubber housing that the air flow meter is clamped into. The picture below shows the clamp - it's just to the right of the socket extension. Tightened it up but no difference. At least that's another minor leak fixed [8D].

SDC10627.jpg


p.s. I'll be the one at blenheim that keeps sticking my ear to your engine cover to compare noises [:D]
 
Steve,

did you ever resolve this one? I have a loud hissing sound similar to yours, seems to affect the half throttle performance i.e. surging/stuttering, but is fine at WOT.

will need to check all those little hoses again tonight....
 
You must log in or register to reply here.

Posts made and opinions expressed are those of the individual forum members

Use of the Forum is subject to the Terms and Conditions

Disclaimer

The opinions expressed on this site are not necessarily those of the Club, who shall have no liability in respect of them or the accuracy of the content. The Club assumes no responsibility for any effects arising from errors or omissions.

Porsche Club Great Britain gives no warranties, guarantees or assurances and makes no representations or recommendations regarding any goods or services advertised on this site. It is the responsibility of visitors to satisfy themselves that goods and/or services supplied by any advertiser are bona fide and in no instance can the Porsche Club Great Britain be held responsible.

When responding to advertisements please ensure that you satisfy yourself of any applicable call charges on numbers not prefixed by usual "landline" STD Codes. Information can be obtained from the operator or the white pages. Before giving out ANY information regarding cars, or any other items for sale, please satisfy yourself that any potential purchaser is bona fide.

Directors of the Board of Porsche Club GB, Club Office Staff, Register Secretaries and Regional Organisers are often requested by Club members to provide information on matters connected with their cars and other matters referred to in the Club Rules. Such information, advice and assistance provided by such persons is given in good faith and is based on the personal experience and knowledge of the individual concerned.

Neither Porsche Club GB, nor any of the aforementioned, shall be under any liability in respect of any such information, advice or assistance given to members. Members are advised to consult qualified specialists for information, advice and assistance on matters connected with their cars at all times.

Porsche
Lockton
Pirelli
Officially approved
Oracle Finance
WEX Esso
Collecting Cars
Archant Dialogue
Back
Top