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#1
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weird whistling noise
01 3.0 x5. I have no codes. also, when its above 50 degrees or so outside, this does not happen. also, it does not happen once the car is warmed up. basically I'll get in and crank up the x5 for the first time. idles/sounds just fine. put it in gear and get going. once I get to about 15~20mph and not under hard acceleration, I hear a whistling noise. imagine having a referee whistle in your mouth but you're sort of half heartedly blowing on it. thats what this sound is. let off the gas, it goes away. feather to half into the gas, its there. once I'm over about 30mph it goes away. also, once I get out of the neighborhood and about a mile away at the first good stop light. its gone and done. doesnt come back unless the car is completely cold again and cold outside as well. no driveability issues. just annoying as heck when you're running around in a quiet neighborhood sounding like you're half stupid playing with a referee whistle lol. any clues at all? |
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#2
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How do you make a whistling sound? By blowing air across a Small opening. When it is cold, stuff tends to shrink except for water and milk. Something is shrinking enough when it is cold outside that it creates an opening that is allowing air to pass through it. Once the engine is warm, the item that shrunk expands so the small opening is no longer there. I would suggest that you look at all the hose clamps in the intake system and give them a turn to tighten them.
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2006 Infiniti G35 2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD Lotus Europa 1970 Destroyed by fire Lotus Europa 1970 S2 Renault Powered Lotus Type 52 1970 Twincam Webers Powered PORSCHE 911 Targa 1982 The Garage Queen Audi Avant donated to Kars for Kids BMW 525IT Sold Audi 4000CS Quattro Sold Jensen Healey Lotus Powered Sold Opel 1900 Sold Triumph Spitfire 1971 Sold Triumph Spitfire 1968 Sold Plymouth "Cuda" 340 Six pack SOLD |
#3
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I remember some posts about DISA valve whistling? Been a while.
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Sent via Telegraph Wires using my Morse Key. 2015 X5 xDrive35i MSport 2013 X5 xDrive35i |
#4
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^I had a whistling problem at one time and the DISA flap was indeed trashed. My intake boot was also torn. Replaced all of those at the same time so I'm not sure which was causing the whistling, it was gone after I replaced all that stuff.
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04 X5 3.0i auto 03 X5 4.6is |
#5
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What they said above. You need to check the rubber intake boot as well as the DISA valve.
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2002 BMW X5 4.6is soon to be LSX swapped. Silver on Imola 2003 BMW X5 3.0i 5 Speed Manual, Sport Pkg, 190,xxx miles and counting. Black/ Black 20" 4.6is Wheels, OEM Stainless Steps, ZHP Shift Knob |
#6
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#7
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The parts that usually break is number 8. Number 8 is called the intake boot.
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2006 Infiniti G35 2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD Lotus Europa 1970 Destroyed by fire Lotus Europa 1970 S2 Renault Powered Lotus Type 52 1970 Twincam Webers Powered PORSCHE 911 Targa 1982 The Garage Queen Audi Avant donated to Kars for Kids BMW 525IT Sold Audi 4000CS Quattro Sold Jensen Healey Lotus Powered Sold Opel 1900 Sold Triumph Spitfire 1971 Sold Triumph Spitfire 1968 Sold Plymouth "Cuda" 340 Six pack SOLD |
#8
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^yup, that's what I replaced.
They like to start cracking at the folds over time.
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04 X5 3.0i auto 03 X5 4.6is |
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