Intermittent hissing noise from under car - New 2010 G37S coupe
06-13-2010, 09:45 PM
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Intermittent hissing noise from under car - New 2010 G37S coupe
Hello all - Just picked up a 2010 G37S coupe yesterday hooray! I noticed tonight when I started it up in the driveway for kicks that there was an intermittent hissing sound coming from somewhere under the car, like to sound of a spray can I guess... I shut the car off after a minute so not sure if it would have gone away on it's own. Really love the car, obviously I'm a noob and don't know what sounds to expect yet... does anyone have an explanation for this (excess gas, etc?). There are no warning indicators on in the car, tires are fine, etc.. Thanks!
06-13-2010, 10:01 PM
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Quick update on this... went out and started her up again and let her run for a few minutes and didn't hear the noise... still, if you have ideas on what it could have been please reply. I'll update the thread if I hear it again
06-15-2010, 08:08 AM
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Anyone else hear this noise... it's pretty faint but I heard it again after a drive. Wondering if I should get it checked out now or wait until the 1000 mile mark when I bring her in for a once over
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06-15-2010, 10:36 AM
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maybe an exhaust leak... sounds like if you hiss through your teeth intermittently, pretty faint but there... sounds like it's coming more from the back. I'm planning on sticking my head under there tonight and will update back if I can get a more precise location
06-15-2010, 11:00 AM
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But an exhaust leak wouldn't be intermittent if the car is on, would it? It should be constant or maybe pulsate, but not be intermittent. That's why I said a/c/ drip.
The fuel pump makes a light hissing sound but it's more constant, too. It's back near the rear passenger wheel I think.
The fuel pump makes a light hissing sound but it's more constant, too. It's back near the rear passenger wheel I think.
06-15-2010, 04:20 PM
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May be just a normal thing... I've found other posts that say it's not an issue (or at least that's how I'm choosing to interpret them 
Hissing sound from underneath car - Nissan 350Z Motoring Forums
hissing from exhaust, when getting off the throttle? - Bimmerforums - The Ultimate BMW Forum
Likely I'll just wait until my 1k check-in and raise it with the dealer unless I notice any performance issues before then
Hissing sound from underneath car - Nissan 350Z Motoring Forums
hissing from exhaust, when getting off the throttle? - Bimmerforums - The Ultimate BMW Forum
Likely I'll just wait until my 1k check-in and raise it with the dealer unless I notice any performance issues before then
06-15-2010, 05:49 PM
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I think it's normal, at least I hope it is cause mine does the same thing. I think it comes from the converters. I've had it looked at and no one knows what it is
06-15-2010, 08:15 PM
#15
our engines are not very quiet and can make random noises sometimes. As long as your service engine light isn't on and you don't notice a performance loss, i wouldn't worry.
if you decide to bring it to the dealers attention, make sure you can reproduce it or else they will use that famous line 'cant reproduce problem'
if you decide to bring it to the dealers attention, make sure you can reproduce it or else they will use that famous line 'cant reproduce problem'