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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 10-15-2013, 11:33 PM   #1
patriot_man
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Join Date: Feb 2011
Location: Mountain View
Posts: 77
My Ride: BMW 330i 2001
Solved: Engine mounts

So today I was merging onto an expressway (redlining) and then I start to get a slight vibration coming from the pedals and steering wheel.

I stop at a stop light and the vibration is very heavy. I mean very heavy. RPMs are fine, no rough idle. Power is fine and same as always. SES came on.

From outside of the car sounds perfectly normal and you wouldn't even think that the car is vibrating but inside the car vibrates heavily.

Could it be the engine mounts? Is it even possible that they gave out so quickly and without notice during my short and rapid merge? I'm not sure if these codes have anything remotely to do with the vibrating. Perhaps the CAT/O2 stuff?


I went home and plugged in DIS and pulled the following codes. I have since deleted the codes and drove a few miles with no codes popping back up but still vibrating heavily.



Last edited by patriot_man; 10-22-2013 at 11:00 PM.
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Old 10-16-2013, 05:20 AM   #2
patriot_man
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Join Date: Feb 2011
Location: Mountain View
Posts: 77
My Ride: BMW 330i 2001
I just checked my PS fluid and it was almost to the bottom. Wtf I just checked it a week ago. I'm guessing I have a leak somewhere.

I'm going to fill it and check back in.
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Old 10-17-2013, 12:55 AM   #3
patriot_man
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Join Date: Feb 2011
Location: Mountain View
Posts: 77
My Ride: BMW 330i 2001
Solved: Engine mounts

Hmmm vibrations are still pretty bad. I'm going to say it's the motor mount. I've had enough of fixing the car myself lol I'm taking it in. I'll report back in with what I find was wrong.

Also cleared the codes yesterday and 3 popped up again today.

Already replaced every vacuum line known to man and the CCV. I ran the test for the secondary pump and I can hear it activating and remaining active for the test period

p0491
p0492
p0505

Last edited by patriot_man; 10-22-2013 at 11:00 PM.
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Old 10-19-2013, 01:55 AM   #4
ocellatus
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Join Date: Apr 2013
Location: Tehran, Iran
Posts: 34
My Ride: 325i 2005
Have you checked the fan blade? Once I had the car heavily vibrating while the engine was working fine, came out to be just a broken blade. Unbalanced fan also cracked the water pump pulley.
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Old 10-19-2013, 05:11 PM   #5
patriot_man
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Join Date: Feb 2011
Location: Mountain View
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My Ride: BMW 330i 2001
I suspected it might have been the fan blade but on red lining the car I think I actually feel the engine moving around and hear a sound from the engine bay.

I guess this is what I get for going around corners too fast and redlining the car every drive. I have yet to check the mounts but once I get the subframe welded I'll check and report back.
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Old 10-19-2013, 06:12 PM   #6
Tangent_
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Join Date: Jun 2006
Location: San Jacinto, CA
Posts: 2,038
My Ride: '01 330i
If your power steering reservoir was almost dry there's a good chance you introduced air into the system. Get your reservoir to the proper level, lift the front of the car to get the tire off the ground, and slowly go fully lock-to-lock to purge the air from your power steering system. Make sure the fluid level stays where it should while you do this since you're displacing air. Air bubbles will cause a chattering noise and vibration you'll definitely feeling in the steering wheel.
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Old 10-19-2013, 06:30 PM   #7
patriot_man
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Location: Mountain View
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Gotcha I'll try that today. Thanks.
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