Q&A
Ask Your Question2001 BMW 330i
Question: A very annoying high pitch sound
Question
I recently acquired a 330i. Everything is good. Just when it speeds up to 20 mph, I can hear a high pitch sound. It goes to a higher frequency when I push the gas paddle. On freeway, it comes and goes. The noise usually comes back when I starts to accelerate, goes away when gas is let go, and comes back again when accelerating. Please help me! It drives me crazy!
-
Answer #1
patrick mannion from Greg Solow's Engine Room, July 07, 2009, 23:45Reply
MasterIts so hard to guess at the source of a noise without being able to hear it first hand. I would start by checking the condition and tightness of the fan belts/drive belts at the front of the engine. A loose fan belt may squeal when the alternator is under load, the air conditioning or steering is operated.
Vacuum leaks can cause a intermittent squeal but would disappear when the car is accelerated under load as engine vacuum decreases on acceleration.Flag ThisLike | 1 person likes this1 -
Answer #2
Letimus September 28, 2009, 17:26Reply
RookieSounds like what was happening to my 2001-325i; Turned out to be rear wheels--wheel bearings going bad. Had them changed (both were bad) at about $300.00 each. Good Luck!
Flag ThisLike | 1 person likes this1 -
Answer #3
ohhholmes February 19, 2010, 16:46Reply
Rookiesounds like you got a blow off valve.
Flag ThisLike | 1 person likes this1 -
Answer #4
Visitor, October 02, 2010, 16:40Replyi have a 330i and had the same problem. took a while to figure it out. its most likely coming from the lower intake boot. its a rubber elbow which is ripped from ribbed part of the tube. its going to cost u 28$ from bmw dealer ship and u can also find a video on youtube which shows u how to get it done
Flag ThisLike0
Featured Shops and Dealerships
This week's top 10
| 1 globalhelper | 6 ttcurtis |
| 2 mastertech6371 | 7 dale45 |
| 3 gmc4me | 8 CHautowerks |
| 4 csubak30 | 9 tunnelram |
| 5 Hal... | 10 Camster |