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      08-08-2021, 03:32 AM   #1
onblue
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B47 rough sound in Drive & Reverse

Hi guys, hopefully I can get some answer...

I have a 320D B47 and this never happen before.

So few days ago I visit my friend and he just bought a new air compressor
That blow air to clean dust. And out of his goodwill, he offer to "blow" my engine bay
From dust. Me, being a noob, didn't think it will create an issue so I let him do it.

So he stick the noozle and blow air here and there inside the engine bay.

Just after I got home I notice a "rougher than usual" sound.

So if I put the car in N, the usual diesel noise.

But when I put it in R (while still holding the brake and the car not yet moving), the sound
Suddenly get rougher. Very noticeable from inside the car. If I put it back to N, the noise back to normal.

Same thing happen when I put it in D.

The RPM is not fluctuating at all. Just the noise. And the car itself still working.

I've tried to look at the engine bay in case something got loose from the air compressor
But so far I didn't see anything...
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      08-08-2021, 11:28 PM   #2
Luverse
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Quote:
Originally Posted by onblue View Post
Hi guys, hopefully I can get some answer...

I have a 320D B47 and this never happen before.

So few days ago I visit my friend and he just bought a new air compressor
That blow air to clean dust. And out of his goodwill, he offer to "blow" my engine bay
From dust. Me, being a noob, didn't think it will create an issue so I let him do it.

So he stick the noozle and blow air here and there inside the engine bay.

Just after I got home I notice a "rougher than usual" sound.

So if I put the car in N, the usual diesel noise.

But when I put it in R (while still holding the brake and the car not yet moving), the sound
Suddenly get rougher. Very noticeable from inside the car. If I put it back to N, the noise back to normal.

Same thing happen when I put it in D.

The RPM is not fluctuating at all. Just the noise. And the car itself still working.

I've tried to look at the engine bay in case something got loose from the air compressor
But so far I didn't see anything...
hello brother from another parents
please post a video so we can understand better about the "noise"

btw, your friend so called "goodwill", should be held responsible if it cause an issue to your engine
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      09-14-2021, 03:15 AM   #3
redbeer
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Well compressed air shouldn't cause any problems no matter where he blew it. Did he unscrew something?
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      09-25-2023, 01:27 AM   #4
Andrius
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Did you manage to find out what was wrong?
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      10-04-2023, 06:33 AM   #5
Eddamoo
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Check out this thread. https://f30.bimmerpost.com/forums/sh....php?t=2052168

The air probably moved one of your panels slightly. Check to see if your scuttle panel is loose and ensure the foam seal is fitted to it properly. Also check your engine cover is fitted by giving it a tug in all 4 corners.
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