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General E46 Forum
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Old 09-22-2012, 05:31 PM   #1
Bobobo-bo Bo-bobo
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Rattling noise from engine

I have a rattling noise coming from my engine bay. Im hoping there isn't something wrong
with my engine and its something minor. Anyone know what the noise is from? Thanks.

Last edited by Bobobo-bo Bo-bobo; 09-25-2012 at 04:28 PM.
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Old 09-23-2012, 06:51 AM   #2
tkrotchko
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The DISA valve can make a clattering noise (when mine went bad, it sounded like a valve problem).

The procedure to check takes 5 minutes and requires no tools:
http://forum.e46fanatics.com/showthread.php?t=748124


Quote:
Originally Posted by Bobobo-bo Bo-bobo View Post
I have a rattling noise coming from my engine bay. Im hoping there isn't something wrong with my engine and its something minor. Anyone know what the noise is from? Thanks.
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Old 09-23-2012, 08:17 AM   #3
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Suggest you read the DISA section in the first link below in my signature.
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Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose fan switch O-ring - BMW #13621743299
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Old 09-25-2012, 03:32 PM   #4
Bobobo-bo Bo-bobo
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my disa valve is running fine. The rattle comes more from the front. It doesnt get louder when I drive the car but it doesnt go away. Sounds more like something is wobbling around loose. its not a uniform rattle

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Old 09-25-2012, 04:03 PM   #5
lsteg
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video of the rattle?
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Old 09-25-2012, 04:29 PM   #6
Bobobo-bo Bo-bobo
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Originally Posted by lsteg View Post
video of the rattle?
Video fixed
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Old 09-28-2012, 10:15 PM   #7
Bobobo-bo Bo-bobo
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Idky my video keeps turning into a picture but the rattle seems to be coming from the front of the engine like one of the tensioners or the pumps. More towards the left side.

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Old 09-30-2012, 04:09 PM   #8
Bobobo-bo Bo-bobo
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Looks like its coming from water pump cover.

Last edited by Bobobo-bo Bo-bobo; 10-01-2012 at 01:38 AM.
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Old 10-02-2012, 01:31 PM   #9
Bobobo-bo Bo-bobo
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Water pump pulley is a little wobbly does this mean the water pump bearings are diekng and the pump needs to be replaced or can I replace just the bearing

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Old 10-02-2012, 02:52 PM   #10
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You'll have to replace the entire water pump. I picked up a Saleri (OEM) water pump from AutohausAz for $55 and the BMW coolant for another $20. Total with tax came out to right under $80. It's a good time to replace the thermostat as well, but I'm going to wait on that. $$$ is a little tight.
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Old 10-05-2012, 05:17 PM   #11
Bobobo-bo Bo-bobo
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Ok ill replace the pump, hopefully thatll fix the noise
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Old 10-05-2012, 10:05 PM   #12
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I had a rattle from the front and it was also my water pump. Old one was plastic and the new one is metal so it a repair and upgrade as well. give it a try, doesn't hurt since you car is most likely due for a pump anyway.
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Old 10-06-2012, 04:32 PM   #13
Bobobo-bo Bo-bobo
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Quote:
Originally Posted by shahbaz99 View Post
I had a rattle from the front and it was also my water pump. Old one was plastic and the new one is metal so it a repair and upgrade as well. give it a try, doesn't hurt since you car is most likely due for a pump anyway.
I bought OEM with composite impeller. Not the best but OEM bearings supposedly last longer than aftermarket and since my bearings are the issue I thought id get the pump with strongest bearings.
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