PDA

View Full Version : WTF is this noise? PLEASE HELP


Merkley
02-06-2012, 01:16 PM
2008 335XI

I took my car for a drive last night, got home to put in the garage and heard this. Notice that the noise STOPS for a little (middle of the video) and starts again.

It is louder than the noise on cold start and this was after my car was fully at temp and had been on the road for 40-60 minutes.

I'm under new car warranty still (2 weeks left ONLY) and have CPO...

http://www.flickr.com/photos/76025545@N05/6829883907/in/photostream

TIA

Havok_2011
02-06-2012, 02:09 PM
Take it to the dealer ASAP before your warranty runs out.

Could be the belt slipping off and/or hitting something (did you check if its firmly on the arm?) could also be your water pump.

Hard to know for sure, regardless, drive into your dealership ASAP and tell them you are scared to drive it due to safety reasons and have them look it over. Things like water pumps cost $$$

And considering you have a 335i, its could be a 1 of a million things to do with your turbos...

PS: Take full advantage of your warranty almost ending and have them do a full inspection on the car, have them catch anything before its too late. Just my opinion though.

Merkley
02-06-2012, 06:47 PM
PS: Take full advantage of your warranty almost ending and have them do a full inspection on the car, have them catch anything before its too late. Just my opinion though.

Mine too... but the SA that I spoke to said they don't do that. I can't believe that they don't... it's good for them (dealership) and me too. The SA said that it's frowned upon by BMW head-office and they get suspicious of 'warranty shopping' --- but give me a break; doesn't everyone running out of warranty do this? Disappointed. If anyone knows a 'more friendly' SA or dealership in GTA please LMK.

...oh and I'm also disappointed that this is only 6 days after picking up a car that was part of their "certified pre-owned" -- so they certified it and I had lifters go less than 1000KM later? I am trying to beat on this a little before my new car warranty is up... been going out every night so far... still can't get pathway lighting to work.

5style
02-06-2012, 09:05 PM
Sounds like its the AC pulley, the electromagnetic one, It gets noisy when worn or dirty when the ac switches on and quiet when it switches off. Was your blower set to window defog? If yes, then its the ac system and thats exactly what it sounds like

Merkley
02-06-2012, 10:14 PM
Sounds like its the AC pulley, the electromagnetic one, It gets noisy when worn or dirty when the ac switches on and quiet when it switches off. Was your blower set to window defog? If yes, then its the ac system and thats exactly what it sounds like

So to test this I should be able to turn my AC on, set to window defog? I don't know why it would go off then back on in such a short time?

...and I'm reading 'worn or dirty'... should be replaced I guess... is this something that the dealership can see easily.... I'm getting ready to put on my fighting gloves...........

5style
02-06-2012, 10:37 PM
So to test this I should be able to turn my AC on, set to window defog? I don't know why it would go off then back on in such a short time?

...and I'm reading 'worn or dirty'... should be replaced I guess... is this something that the dealership can see easily.... I'm getting ready to put on my fighting gloves...........

Well, when you switch front window defog on ( blower to the front window), the ac comes on automatically. If you just switch the AC on, make sure the fans are on too ( blower fans) and it SHOULD make the same noise.

The AC compressor does not run a lot, it switches on and off, depending on AC system load. If its truly the AC pulley ( which is magnetic) it either bypasses the compressor or actuates it, it will make the noise whenever the compressor works. I've heard much louder, yours is actually quiet lol, some SQUEEL like mad because they are either siezed or worn out

Basically, turn off your hvac completely, see if it makes the noise. If no, turn the AC on to full blast, blower fan on, and check if it starts making the noise. If yes, then there is your issue, but honestly thats what it sounds like since the AC compressor turns on and off all the time when its in use, its not designed to run 24/7

They most likely will not replace this part, they will opt for replacing the whole AC compressor, but if its under your dime, fight for just that piece as its obviously much cheaper.

SiR
02-07-2012, 12:22 AM
hrmmm ... sort of sounds like it could be wastegate rattle.... *google that issue*
but im leaning towards no.

take it to the dealer

5style
02-07-2012, 12:55 AM
hrmmm ... sort of sounds like it could be wastegate rattle.... *google that issue*
but im leaning towards no.

take it to the dealer

I don't think so, would the wastegate open/close at idle like that? shurg?:confused:

5style
02-07-2012, 01:00 AM
Watched some stuff on youtube, doesn't sound like the wastegate rattle, but shurg! who knows, do ac test first, i still think its the AC clutch pulley being noisy

Merkley
02-07-2012, 08:34 AM
^ thanks! I'll do some more google'ing and reading on the AC system. I like to at least pretend I know what I am talking about when I talk to the SA's.

Have appointment tonight after work.

SiR
02-07-2012, 09:02 AM
I don't think so, would the wastegate open/close at idle like that? shurg?:confused:

... i see you googled the issue after ;) . its quite a common problem on the car. and I agree Im leaning towards no of it being the cause.

but OP should just stop having us playing internet guessing games and take it to the dealer before warranty expires.

T.Dot_E30
02-07-2012, 09:10 AM
Did you atleast check the oil level ? e90s dont have dipsticks right? Does the computer tell you the oil level or just life?

Probably not the issue, start with the basics, low oil level can cause lifter noise, as well as many other things like wrong oil, broken down oil, etc..
Plus if you follow BMWs oil change interval, then there is a higher chance it's low on oil if you're towards the end of that interval.

Merkley
02-07-2012, 10:03 AM
Did you atleast check the oil level ? e90s dont have dipsticks right? Does the computer tell you the oil level or just life?

Probably not the issue, start with the basics, low oil level can cause lifter noise, as well as many other things like wrong oil, broken down oil, etc..
Plus if you follow BMWs oil change interval, then there is a higher chance it's low on oil if you're towards the end of that interval.

It's not an oil LEVEL issue according to the car. IDK what oil they used, but since it's the dealership I expect that it's the proper kind. The car was supposedly just serviced and brought to CPO (Certified Pre-Owned) status. That's part of what disappoints me. Paid EXTRA for this because I got it from a dealer it was supposed to be in perfect condition. (to their credit, I have new tires, pads and rotors and all the other "check" systems in the car show 10K+ kms until service)

jmack
02-07-2012, 10:16 AM
If you bought it CPO they should be dealing with these issues, let them sweat it.

Havok_2011
02-07-2012, 11:30 AM
If you bought it CPO they should be dealing with these issues, let them sweat it.

I agree...I would head to downtown BMW, and like I originally stated tell them the car is making noises, and you don't feel safe driving it.

They have an obligation to check and correct the issue.

I would be livid with them if they said no. But Downtown BMW has always been friendly when I go there. I can't imagine them turning you away.

2bmw2
02-07-2012, 12:46 PM
It's not an oil LEVEL issue according to the car. IDK what oil they used, but since it's the dealership I expect that it's the proper kind. The car was supposedly just serviced and brought to CPO (Certified Pre-Owned) status. That's part of what disappoints me. Paid EXTRA for this because I got it from a dealer it was supposed to be in perfect condition. (to their credit, I have new tires, pads and rotors and all the other "check" systems in the car show 10K+ kms until service)

You should just take it to the dealer, you can't easily make a diagnosis remotely.

5style
02-07-2012, 01:41 PM
In for what they say, my money is on the compressor clutch pulley being noisy

Merkley
02-07-2012, 01:57 PM
You should just take it to the dealer, you can't easily make a diagnosis remotely.

Yep, headed there today after work. The problem I have is that it's intermittent and that's why I recorded it. I have a feeling that the noise will not be there when I arrive at the dealership and they are going to give me some line "well it's not there now". I don't want to leave my car there for days because I am still discovering little 'things' on it that I want address while the ink is fresh on the sale AND while I am under the new car warranty (until the 26th only!)

Little things like I can't get my pathway lighting to work. I think it's a user error, but I have tried what other posters say many times and it just does not work. The headlights come on and stay on, but not the little lights under the door. Under new car warranty its covered, under CPO it's not.

Merkley
02-07-2012, 07:23 PM
UPDATE:

Even though I had sent the video from my phone to the SA he had not been able to play it I was disappointed that they would not contact me to tell me they couldn't play the video. I could have converted to a .wav or .mp3. He also was young enough he could have sent it to his phone and played it. ANYWAY, just not great service IMO. Fine, have a problem; but wait 2 days until the customer is in the shop to tell them? BOO!

I played the video for him on my phone and he somewhat beat around the bush but did eventually say "that is not a normal sound". I was happy that he agreed without much 'fuss'. The main guy is away this week on education so I am going back next Wednesday. He also will share the video with his main guy but said he would want to hear the noise himself. I fear I will be without a car for a while if that's the case; intermittent noises can be from hell to find... seeing as I have 19 days of "new car" warranty left I am not happy to lose it for any of that time. I want to find out what else is going to break... do some hard driving, test it out.

... and my 'under the door handle' lighting IS BROKEN TOO. The whole CPO thing seems like a pretty shit process right now. In 6 days of ownership I have an engine problem and lighting failure. Makes you wonder what you get from them if you don't get a CPO vehicle!?

5style
02-07-2012, 07:38 PM
UPDATE:

Even though I had sent the video from my phone to the SA he had not been able to play it I was disappointed that they would not contact me to tell me they couldn't play the video. I could have converted to a .wav or .mp3. He also was young enough he could have sent it to his phone and played it. ANYWAY, just not great service IMO. Fine, have a problem; but wait 2 days until the customer is in the shop to tell them? BOO!

I played the video for him on my phone and he somewhat beat around the bush but did eventually say "that is not a normal sound". I was happy that he agreed without much 'fuss'. The main guy is away this week on education so I am going back next Wednesday. He also will share the video with his main guy but said he would want to hear the noise himself. I fear I will be without a car for a while if that's the case; intermittent noises can be from hell to find... seeing as I have 19 days of "new car" warranty left I am not happy to lose it for any of that time. I want to find out what else is going to break... do some hard driving, test it out.

... and my 'under the door handle' lighting IS BROKEN TOO. The whole CPO thing seems like a pretty shit process right now. In 6 days of ownership I have an engine problem and lighting failure. Makes you wonder what you get from them if you don't get a CPO vehicle!?

Eh, don't stress too much, the noise is intermitted, which means its not te turbos or the valves as those would be constant. I still say ac clutch pulley, since 99.999999% of cars turn the compressor on when you change the blower setting to window, feet and window since cold air clears condensation quicker and its dry air since the a.c. system produces dry air. Also, it sounds like its noise is consistant with the engine turning, aka, something that is belt powered, and intermittent, so that leaves Ac clutch pulley and alternator, since both don't run 24/7 but in cycles. Alternators however can be heard phasing through the radio, and otherwise are not audible even when failing.

Merkley
02-07-2012, 10:10 PM
Eh, don't stress too much, the noise is intermitted, which means its not te turbos or the valves as those would be constant. I still say ac clutch pulley, since 99.999999% of cars turn the compressor on when you change the blower setting to window, feet and window since cold air clears condensation quicker and its dry air since the a.c. system produces dry air. Also, it sounds like its noise is consistant with the engine turning, aka, something that is belt powered, and intermittent, so that leaves Ac clutch pulley and alternator, since both don't run 24/7 but in cycles. Alternators however can be heard phasing through the radio, and otherwise are not audible even when failing.

I agree that it sounds consistant with the engine turning. It's just that it was pretty loud.... it was louder than it seems on the video... lol ;)

Thanks for the details. I'll follow up after I meet with them next week... hopefully with the problem solved even.

damameke
02-08-2012, 11:41 AM
PM BMW 335, he is a member here and a SA for Maranello BMW, he can help.

Merkley
02-08-2012, 12:21 PM
^cheers!