weird noises

dmhonda · 10-25-2012, 05:16 AM

so out of nowhere my car starts making a chirping noise like a cricket is under my hood. when I first start the car it is consistent but once you start driving it goes away and will come back every once in awhile.any suggestions

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lucky_doggg7 · 10-25-2012, 05:47 AM

Shooting from the hip, my guess is a worn out bearing on a tensioner pulley or idler pulley.

325xittt · 10-25-2012, 05:54 AM

Could be a loose belt, or a bearing going. Try to isolate where the sound is coming from. Use a 3ft section of tubing like a stethoscope. Hold one end to your ear and carefully probe the running engine with the other end. Be mindful of moving parts and electric fans that may start suddenly.

Big Rick · 10-25-2012, 06:25 AM

Quote:

Originally Posted by lucky_doggg7

Shooting from the hip, my guess is a worn out bearing on a tensioner pulley or idler pulley.

^^^^^
THIS... With maybe a bad belt thrown in...

lucky_doggg7 · 10-25-2012, 06:29 AM

Hey Rick, we might be completely off base... What if the OP had an infestation of crickets under the hood of his Bimmer?

Kubica · 10-25-2012, 09:02 AM

So it was easier to join the forum and start a thread, than to open the hood and have a quick look to see if you can pinpoint where the noise is coming from?

Rickna · 10-25-2012, 11:27 AM

Ok, this is very strange-I had a similar noise (like very loud crickets), you could hear it out of either side when the windows were down. Driving me crazy! It mostly happened at hiway speeds, but not while accelerating. Shifting into N didn't make any difference, nor did turning the steering wheel. Turns out I had a broken stud on one of the downpipes to the catback. I had to drill out the remainder and use a bolt & nut. Problem solved.

murac14 · 10-25-2012, 04:26 PM

Had same thing you need to change the whole tensioner I'm 99% sure that is it take a hose or pipe and put it on your ear and pinpoint it

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dmhonda · 10-25-2012, 09:39 PM

The sound is coming from the back of the intake. The car has 130k miles is there anything else I should look in to fixing?

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Rickna · 10-26-2012, 04:47 AM

Quote:

Originally Posted by dmhonda

The sound is coming from the back of the intake. The car has 130k miles is there anything else I should look in to fixing?

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Cracked intake boots, vaccum lines.

dmhonda · 10-30-2012, 05:55 AM

So I figured out what the noise was.. and no it wasn't a cricket infestation...lol that's a good one tho. It's called a disa adjustment unit its on the intake manifold and its right above the throttle body. Thx for all the advice

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DINxiAN · 10-31-2012, 05:40 AM

I put on a brand new Maserati belt on like two weeks ago...every time the car sits and cools below freezing...it squeaks for a few mins on startup. Cold belt ~ stiff rubber... = squeaks

Rickna · 10-31-2012, 06:36 AM

I rebuilt my DISA with a kit from German Auto Solutions. Better components than OEM. It will outlast a brand new unit. Easy to do.

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Dahmwern · 10-31-2012, 10:04 AM

I had this chirping noise when I bought the car. It came on with the AC. I noticed this mostly started happening in the cold.

I think replacing the pulley and belt solved the issue IIRC.

dmhonda · 11-01-2012, 05:19 PM

well thanks but I live in Florida so I'm not going to have an issue with a cold belt and its most definitely the disa unit it's coming from the top of the engine not the front of the car

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10-25-2012, 05:16 AM	#1
dmhonda Registered User Join Date: Oct 2012 Location: lehigh acres fl. Posts: 13 My Ride: 03 325xi/03 636ninja View My Garage	weird noises so out of nowhere my car starts making a chirping noise like a cricket is under my hood. when I first start the car it is consistent but once you start driving it goes away and will come back every once in awhile.any suggestions Sent from my ADR6400L using Bimmer App

10-25-2012, 05:54 AM	#3
325xittt Registered User Join Date: Apr 2010 Location: Reading, PA Posts: 138 My Ride: 2003, 325 XIT View My Garage	Could be a loose belt, or a bearing going. Try to isolate where the sound is coming from. Use a 3ft section of tubing like a stethoscope. Hold one end to your ear and carefully probe the running engine with the other end. Be mindful of moving parts and electric fans that may start suddenly. __________________

10-25-2012, 11:27 AM	#7
Rickna Registered User Join Date: Nov 2008 Location: West Haven, CT, USA Posts: 1,945 My Ride: '02 330xi AT View My Garage	Ok, this is very strange-I had a similar noise (like very loud crickets), you could hear it out of either side when the windows were down. Driving me crazy! It mostly happened at hiway speeds, but not while accelerating. Shifting into N didn't make any difference, nor did turning the steering wheel. Turns out I had a broken stud on one of the downpipes to the catback. I had to drill out the remainder and use a bolt & nut. Problem solved. __________________ 237 years of democracy has died, and with thunderous applause My_Mods_&_Stuff

10-31-2012, 05:40 AM	#12
DINxiAN Registered User Join Date: Jun 2010 Location: Twin Cities Posts: 17 My Ride: Is black View My Garage	I put on a brand new Maserati belt on like two weeks ago...every time the car sits and cools below freezing...it squeaks for a few mins on startup. Cold belt ~ stiff rubber... = squeaks __________________

10-31-2012, 06:36 AM	#13
Rickna Registered User Join Date: Nov 2008 Location: West Haven, CT, USA Posts: 1,945 My Ride: '02 330xi AT View My Garage	I rebuilt my DISA with a kit from German Auto Solutions. Better components than OEM. It will outlast a brand new unit. Easy to do. Sent from my PH44100 using Bimmer App __________________ 237 years of democracy has died, and with thunderous applause My_Mods_&_Stuff

10-25-2012, 05:47 AM	#2
lucky_doggg7 Registered User Join Date: Mar 2008 Location: OC Posts: 282 My Ride: 2005 M3 View My Garage	Shooting from the hip, my guess is a worn out bearing on a tensioner pulley or idler pulley.

10-25-2012, 06:29 AM	#5
lucky_doggg7 Registered User Join Date: Mar 2008 Location: OC Posts: 282 My Ride: 2005 M3 View My Garage	Hey Rick, we might be completely off base... What if the OP had an infestation of crickets under the hood of his Bimmer?

10-25-2012, 09:02 AM	#6
Kubica Registered User Join Date: Apr 2008 Location: Boston Posts: 3,904 My Ride: 2003 325xi View My Garage	So it was easier to join the forum and start a thread, than to open the hood and have a quick look to see if you can pinpoint where the noise is coming from?

10-25-2012, 04:26 PM	#8
murac14 Registered User Join Date: Jul 2012 Location: new york Posts: 70 My Ride: 2001 325i View My Garage	Had same thing you need to change the whole tensioner I'm 99% sure that is it take a hose or pipe and put it on your ear and pinpoint it Sent from my PC36100 using Bimmer App

10-25-2012, 09:39 PM	#9
dmhonda Registered User Join Date: Oct 2012 Location: lehigh acres fl. Posts: 13 My Ride: 03 325xi/03 636ninja View My Garage	The sound is coming from the back of the intake. The car has 130k miles is there anything else I should look in to fixing? Sent from my ADR6400L using Bimmer App

10-30-2012, 05:55 AM	#11
dmhonda Registered User Join Date: Oct 2012 Location: lehigh acres fl. Posts: 13 My Ride: 03 325xi/03 636ninja View My Garage	So I figured out what the noise was.. and no it wasn't a cricket infestation...lol that's a good one tho. It's called a disa adjustment unit its on the intake manifold and its right above the throttle body. Thx for all the advice Sent from my ADR6400L using Bimmer App

10-31-2012, 10:04 AM	#14
Dahmwern Registered User Join Date: Oct 2008 Location: East Lansing, MI Posts: 56 My Ride: 2005 BMW 325xi 5spd. View My Garage	I had this chirping noise when I bought the car. It came on with the AC. I noticed this mostly started happening in the cold. I think replacing the pulley and belt solved the issue IIRC. __________________ \| CSL 18" Reps \| H&R Coilovers \| UUC EVO3 Short Shifter \| Conforti Shark Injector \| Magnaflow exhaust \| TMS Power Pulleys \| CAI w/ Custom Built Box \| Drilled\Slotted Rotors \| ZHP Shift Knob \| Brushed Metal Trim \| ECS Carbon Fiber Brake Handle \| Black Grilles \| Angel Eyes \| DIY Clutch Stop \| DEPO Smoked Corners \| DEPO Sidemarkers \| DEPO Smoked R/C/R Tails \| DIY AUX input \| DIY Red Needle Mod \| CDV Delete \| Front Plate Delete \| Debadged \|

11-01-2012, 05:19 PM	#15
dmhonda Registered User Join Date: Oct 2012 Location: lehigh acres fl. Posts: 13 My Ride: 03 325xi/03 636ninja View My Garage	well thanks but I live in Florida so I'm not going to have an issue with a cold belt and its most definitely the disa unit it's coming from the top of the engine not the front of the car Sent from my ADR6400L using Bimmer App

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