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-   -   My car sounds like a airplane (http://www.bimmerfest.com/forums/showthread.php?t=666176)

Rubio 12-26-2012 07:19 AM

My car sounds like a airplane
 
I wanted to see if anybody had the same problem or can help me out with my problem my car sounds like an airplane when I'm hitting the gas and it feels really heavy

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Nline6 12-26-2012 07:41 AM

Clutch fan? Are you talking about the wooshing shound on take off?

guysimmons89 12-26-2012 07:53 AM

It could be your driveshaft about to go. I had that problem on my old car. You can still drive but not far before it goes out.

Rubio 12-26-2012 08:16 AM

it's more like a humming sound

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Rubio 12-26-2012 08:18 AM

not only take off but it sounds louder on takeoff

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Rubio 12-26-2012 08:21 AM

I have a humming noise that sounds like it's coming from the engine and I have a rubbing noise it sounds like it's coming from a tire rubbing against something I checked all 4 tires and nothing

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Rubio 12-26-2012 08:22 AM

Thank u

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guysimmons89 12-26-2012 08:28 AM

Strange. The driveshaft is a little louder than just a hum so maybe not that. I'm not sure what to tell you.

MikesE39 12-26-2012 10:20 AM

Does the sound only come on when ur AC or Heat is on? Because mine does that same sound but only when those are on.

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waehrik 12-26-2012 12:28 PM

There are two main causes of a loud airplane sound: the secondary air pump (electric) and the engine-driven-though-clutch fan.

The relay may fuse on the secondary air pump and cause it to stay on all the time. Unplug the relay to see if it turns off for diagnostics. It will burn out in short order if left to run all the time. It's only supposed to be on for a minute after a cold start to inject air into the primary cats to heat them up faster.

The fan clutch on the front of the engine may sieze up, causing the fan to rotate at water pump speeds all the time. This is even worse as the fan was not meant to go that fast and has been known to explode if it is weak or contacts the shroud due to worn engine mounts. This is easy to identify. At a stop, rev the engine in neutral. If it sounds like it's taking off, then it's this fan and you should change the clutch and fan blades immediately. If it's loud while doing this it also can't be the driveshaft as it isn't moving...

Rubio 12-26-2012 01:15 PM

Thank u so much

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Rubio 12-26-2012 01:16 PM

Even when the AC is off or heat

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Rubio 12-26-2012 01:16 PM

Lol its cool thank u

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waehrik 12-26-2012 04:30 PM

When you perform the above diagnostics please report back with your findings. Same if you find a solution.

This way other new members such as yourself can find help in this thread as you hopefully are.

Rubio 12-26-2012 04:49 PM

no problem will do

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poormansM5 12-28-2012 11:58 AM

could also be your cooling system not doing its job. The car might be running hotter than normal. Check to make sure your coolant level is correct. Any noticable leakage?

Joelgk 12-30-2012 06:57 AM

Wheel Bearings??

540iman 12-30-2012 09:42 AM

If it were your SAP, it would ONLY last about 90 seconds after a cold start-up. That's
it! If it is possible it is your fan clutch (do search about rolled-up newspaper) your fan blades could come up right through your hood, destroy radiator, and more. At least see if you can easily stop fan blade on a cold start-up in morning with just a small amount of rolled-up newspaper. If you can't stop your fan blade easily right upon cold start-up, your fan clutch is NG. Then you'd be driving with time bomb ticking. Do not race over about 3000 rpm if you find fan blade clutch is shot.

540iman 12-30-2012 10:39 AM

go to about 3rd page on bimmerforum and read new post called "clutch fan of death" to see what you *might* be up against.

Rubio 12-30-2012 04:48 PM

Thank u

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damisco 12-30-2012 11:03 PM

sounds like your fan clutch is close to due


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