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cyanescent
Newbie


Joined: 10 Feb 2019
Posts: 7



PostPosted: Sun Feb 10, 2019 4:46 pm    Post subject: strange pumping noise coming from front Reply with quote

New owner here - so I bought my 997 C4S (2007) a couple of months ago. Yesterday when driving through town, noticed a strange pumping noise coming from the front - a bit like a pump with liquid swooshing and a regular clicking noise. It only occurred when moving - when stopped, it went away. after I pulled over and looked in the frunk and the various compartments, couldn't see anything obvious, so I continued driving. It then stopped making the noise.

Just wondering if this is a normal thing? it was the first time I'd really noticed it, probably because driving slowly through town, so the engine didn't drown everything out... just nervous about strange noises! I did wonder if perhaps it was fluid being pumped through the radiators or something?

Thanks for any advice Smile
 
  
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Alex
Le Mans
Le Mans


Joined: 06 Mar 2014
Posts: 16485
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Sun Feb 10, 2019 4:57 pm    Post subject: Reply with quote

When it does it does depressing your clutch make any difference?
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2000 Manual 996 C4 Arctic Silver Convertible


 
  
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cyanescent
Newbie


Joined: 10 Feb 2019
Posts: 7



PostPosted: Sun Feb 10, 2019 5:07 pm    Post subject: Reply with quote

Can't remember - I will keep an ear out and see if that changes anything if it happens again. What would that imply?
thanks.
 
  
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vlad
Imola


Joined: 16 Aug 2006
Posts: 859
Location: Berkshire


PostPosted: Sun Feb 10, 2019 5:12 pm    Post subject: Reply with quote

Headlight washer jets Dont know

Every so many squirts on the washer on the windscreen these pop-up, you weren't cleaning your windscreen at the time ?
 
  
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Gazc2
Kyalami


Joined: 08 Nov 2003
Posts: 1941
Location: Perthshire


PostPosted: Sun Feb 10, 2019 5:29 pm    Post subject: Reply with quote

Is it a gurgling noise ? if it is your A/C needs topped up
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2007 997 Turbo & 924s in progress
1990 964 C2
1989 3.2 targa
1987 3.2 Cab
1986 3.3 Turbo
1986 944 2.5 (later fitted with a 2.7 after wife went scuba diving in a flood and popped a piston through the block)
 
  
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deMort
Long Beach


Joined: 21 Mar 2015
Posts: 6963
Location: Brighton


PostPosted: Sun Feb 10, 2019 5:35 pm    Post subject: Reply with quote

Yeah
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cyanescent
Newbie


Joined: 10 Feb 2019
Posts: 7



PostPosted: Sun Feb 10, 2019 5:37 pm    Post subject: Reply with quote

vlad wrote:
Headlight washer jets Dont know

Every so many squirts on the washer on the windscreen these pop-up, you weren't cleaning your windscreen at the time ?


nope - wasn't cleaning windscreen or headlight washers. I regularly blip the headlight washers to stop them gunking up too.
 
  
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Iwantone
Trainee


Joined: 22 May 2016
Posts: 63
Location: Oxon


PostPosted: Sun Feb 10, 2019 5:37 pm    Post subject: Reply with quote

^This if it is gurgling and sounds like it is coming from the back of the centre console
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cyanescent
Newbie


Joined: 10 Feb 2019
Posts: 7



PostPosted: Sun Feb 10, 2019 5:39 pm    Post subject: Reply with quote

Gazc2 wrote:
Is it a gurgling noise ? if it is your A/C needs topped up


bit of a gurgling/swooshing noise, like something pumping liquid/air... heater temp is set to around 25C at the moment... but it stopped making the noise after a bit...
 
  
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cyanescent
Newbie


Joined: 10 Feb 2019
Posts: 7



PostPosted: Sun Feb 10, 2019 5:40 pm    Post subject: Reply with quote

Iwantone wrote:
^This if it is gurgling and sounds like it is coming from the back of the centre console


yeah, from the back of the centre console....

so if it is that, how urgent is it? :<
 
  
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deMort
Long Beach


Joined: 21 Mar 2015
Posts: 6963
Location: Brighton


PostPosted: Sun Feb 10, 2019 6:12 pm    Post subject: Reply with quote

Sit in the car stationary with the engine running , a/c on temp at 19.5 and a fan speed of 3 bars ..

Give it a few mins and see if the noise starts .. if it doesnt then probably not a/c but if the noise starts then turn off the a/c .. if it stops then you have just proved its low a/c gass .
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cyanescent
Newbie


Joined: 10 Feb 2019
Posts: 7



PostPosted: Sun Feb 10, 2019 6:38 pm    Post subject: Reply with quote

deMort wrote:
Sit in the car stationary with the engine running , a/c on temp at 19.5 and a fan speed of 3 bars ..

Give it a few mins and see if the noise starts .. if it doesnt then probably not a/c but if the noise starts then turn off the a/c .. if it stops then you have just proved its low a/c gass .


Thanks - will try that this week!
 
  
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cyanescent
Newbie


Joined: 10 Feb 2019
Posts: 7



PostPosted: Wed May 22, 2019 12:14 pm    Post subject: Reply with quote

deMort wrote:
Sit in the car stationary with the engine running , a/c on temp at 19.5 and a fan speed of 3 bars ..

Give it a few mins and see if the noise starts .. if it doesnt then probably not a/c but if the noise starts then turn off the a/c .. if it stops then you have just proved its low a/c gass .


it's been quite a while without an update - sorry - a lot of travel and the noise vanished and didn't reoccur...

However, I just had it serviced, and it turns out that it very likely was the air-con - they found that the radiator for the aircon was cracked, so required replacing, new condenser, and regassing. I just wouldn't have noticed the air con not really running because it's been so cold in the UK until now!

Anyway, it's all replaced (warranty, thankfully!) so it's all good now. Thanks for the responses - it was very helpful and nice to get the support Smile
 
  
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