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Discussion Starter · #1 · (Edited)
Car: 2004 325i SULEV

I have had this noise since the last 10 months suddenly after I put some strange gazoline in Germany. All pumps are blue and I was a bit confused as to what to use, I asked once, but people were not sure...No mention of Techron fuel etc.

Nothing on GT1 computer, been inspected by 2 dealerships and 1 indy.
For them this noise in normal. One dealer told me this noise is my injectors but there is nothing to worry about.
The car has 22k miles.

Video link:
http://www.dailymotion.com/fooljam/video/x6g46o_bmw-e46-325i-engine-cricket-noise

Since this noise appeard the car also started to vibrate.

What I did since:

- New air filter
- MAF cleaned
- New ignition coils
- Engine/Injectors cleaners (Both in tank and air intake directly), several times.

I am out of idea.

Can I have your opinion guys, this cricket noise and vibration is getting on my nerve, even if from the inside, the noise is barely heard.
 

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Discussion Starter · #6 ·
hmmm....okay.....have you changed the water pump? maybe the sound is coming from the water pump propeller hitting the engine block....something defiantly not right with your engine
I found some threads which are similar but not 100% related.
Most people cleaned it up and it went away.
http://forum.e46fanatics.com/showthread.php?t=342081&page=3
http://forums.bimmerforums.com/forum/showthread.php?t=900798

Even if disconnected but very dirty could the sound come from here?

I am pretty sure it comes from the top of the engine, manifold area, I removed the engine cover as you can see. I might be wrong, sounds are travelling..
 
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