LoudBimmer Posted August 20, 2010 Report Share Posted August 20, 2010 Hello today when i was driving i heard whistling noise coming from engine. It usually start's when RMP get's over 2000. Sound's like it coming from alternator. What could it be? it's 2001 bmw 325i. Quote Link to comment Share on other sites More sharing options...
bassHZ Posted August 20, 2010 Report Share Posted August 20, 2010 alternator whine ? when ur rca's are close to ur power cables Quote Link to comment Share on other sites More sharing options...
BulletInjection Posted August 20, 2010 Report Share Posted August 20, 2010 Could be that or your intake. When I rev mine up quick and let off my intake sounds like a blow off valve lol Quote My build: http://www.stevemeadedesigns.com/board/ind...8920&st=100 http://www.youtube.com/Bulletinjection Link to comment Share on other sites More sharing options...
Loudcivic Posted August 20, 2010 Report Share Posted August 20, 2010 check for a vacuum leak. look for split or broken hoses around the top of the engine were the intake hooks up to the motor. a noise like that is usually a vacuum leak. possibly could be a bearing going bad to. take a video of it and put it up on youtube and post it here so we can hear the noise if possible Quote 2015 silverado crew cab nothing atm but soon... Link to comment Share on other sites More sharing options...
LoudBimmer Posted August 20, 2010 Author Report Share Posted August 20, 2010 other thing is, when i start my car up it shake little bit. could that be connected to that noise in engine? Quote Link to comment Share on other sites More sharing options...
Livin Loud 906 Posted August 21, 2010 Report Share Posted August 21, 2010 If your car has a vacuum leak like Civic said that would contribute to a rough idle. So yeah it could all be related. Quote Link to comment Share on other sites More sharing options...
Boon Posted August 23, 2010 Report Share Posted August 23, 2010 other thing is, when i start my car up it shake little bit. could that be connected to that noise in engine? Either you've got a vacuum leak as mentioned, which is causing the whistle and the rough idle because the engine is running a bit lean (air bypassing the AFM/MAF or whatever those cars use) OR what you're hearing is actually a squealing from a shagged bearing and your engine is on the way out, which is why it's running rough. Checked your oil level recently? When was the car last serviced? Quote 10.x volts fo' life! Link to comment Share on other sites More sharing options...
Gotloud555 Posted October 6, 2010 Report Share Posted October 6, 2010 If you engine start to shake it could be a problem in general. I would start looking at the engine mount on each side, behind, and side to see any tear or crack.. Quote Link to comment Share on other sites More sharing options...
Mosin Posted October 9, 2010 Report Share Posted October 9, 2010 With vehicle idling take some starting fluid and spray it up and down the vacuum lines and if the idle changes at all, you've found your leak. Quote Derp. Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.