Hi Guys,

Got a (intermittent teapot whistling noise) coming from under the hood or underneath in the middle of the car with cold-engine start. The noise last about 30-45 secs and then it goes away. Can't figure out what it is, anyone hear this on their V8s?

The noise is not from the (Both PCV "Positive Crankcase Ventilation", serpent belt, ac belt, belt tensioner or the deflection pulley) since they were all recently replaced.

Thanks,
seahawk
2006 550i

 

None of you with v8 with this issue here?

 

Did you ever solve for this? My 2006 550i is doing exactly the same thing. I believe it has something to do with the alternator or charging strategy. If I let the car sit at idle while the whistling is going on, it will start to stumble and misfire, eventually triggering the check engine light. Once the whistling stops, it runs smooth as silk.


Thoughts anyone?

 

Check for secondary air injection pipes cracked and leaking air. Or, maybe crankcase ventilation valves faulty.

 

E-Box fan definitely whistles "like a teapot" had to replace mine before. Listen to see if the noise comes from the glove box area when it happens if so you know exactly what it is.

 

I believe the N62TU, i.e. 4.8L V8, does not come equipped with the secondary air system as installed on the 4.4L.

 

ive heard this noise on my '10 550i , kinda sounds like its from a pulley but its more like 10-15sec and its gone no rough idle or cel...

 

Hi Ghost550i,

I'm currently living with this and think about getting the water pump done as was suggested from a member on bimmerfest, let me know if you do find out what the cause of this.

seahawk

 

I replaced the water pump about 9 months ago. There was a squeaky noise audible at idle...After pulling the drive belt, I could see that there was slop in the water pump pulley. This "teapot" noise is definitely a different issue.

 

Wonder if anyone would know where is this "teapot" noise coming from. It's been like this for a year now.