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#1 (permalink) Old 05-15-2009, 12:10 PM
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Strange noises from underneath

I have an 05 325i with just under 60k miles and recently it started making this strange whining noise when i start it up in the morning. It is coming from the tranny/exhaust area but I can't figure out exactly what it is. Any ideas?
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#2 (permalink) Old 05-15-2009, 12:44 PM
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Quote:
Originally Posted by Rebekah325i View Post
I have an 05 325i with just under 60k miles and recently it started making this strange whining noise when i start it up in the morning. It is coming from the tranny/exhaust area but I can't figure out exactly what it is. Any ideas?
is it a manual transmission? if so it could be the throw out bearing. let in and out of the clutch and if the noise stops with the clutch in thats the problem.
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#3 (permalink) Old 05-15-2009, 04:15 PM
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strange noises

unfortunately it is an automatic. I am leaning towards an exhaust leak but that is mainly just wishful thinking. I can't check my fuel filter because it's inside of the fuel tank(M56) motor, and I don't have the tools necessary until next weekend to get underneath the car. Te noise is only when the car i at idle and most noticeable cold. I have also been told to look at the u-joints to see if there could be something there. I appreciate any suggestions.
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#4 (permalink) Old 05-16-2009, 07:58 AM
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Quote:
Originally Posted by Rebekah325i View Post
unfortunately it is an automatic. I am leaning towards an exhaust leak but that is mainly just wishful thinking. I can't check my fuel filter because it's inside of the fuel tank(M56) motor, and I don't have the tools necessary until next weekend to get underneath the car. Te noise is only when the car i at idle and most noticeable cold. I have also been told to look at the u-joints to see if there could be something there. I appreciate any suggestions.
well its not the u-joints if its at idle, your not moving. hard to say, maybe its a loose heat shield rattling on the exhaust??
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#5 (permalink) Old 05-17-2009, 03:41 PM
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Figured it out (maybe)

It is coming from one of the emissions components. Go California laws. I ate this state.... Anyways, my mechanic hasn't been able to dig in yet but i think it's important in case someone else runs across this problem so I will keep you posted.
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#6 (permalink) Old 05-23-2009, 07:48 PM
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I had a similar-sounding issue with my '04 325xi. Turned out it was the fuel pump and lines that were making the noises (discovered after a different dealer replaced two pulleys and belts with no effect on noises). Good luck.
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#7 (permalink) Old 09-22-2009, 08:31 AM
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My noise was from a lose air filter box mounting clip
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#8 (permalink) Old 09-26-2009, 11:00 AM
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Strange Noise Under the Hood Possibility

I don't know if you found the problem, however I just came on-line to look for DIY tips to replace my fan clutch. My engine makes noise in the morning when I start it and it goes away as the engine warms up. My buddy is a mechanic and notice the clutch fan was getting loose. The fan is wobbley when it is touched. I hope that this helped! The part cost me about $88 at Arizona Autohaus...shipped. Great service as well!

A quick thank you to everyone that participates on this forum! You folks are great!
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#9 (permalink) Old 09-27-2009, 12:41 AM
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coming back to the mentioned u-joint, my 2000 328ci 5spd makes a loud squeking noise in the rear when im driving, which started right after i drove over a big puddle. any suggestions? ive been told it could be the u-joint. i hope to hell not.

sorry, didnt feel like making a new thread or searching.
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