F30 N20 motor mounts?

sigtwenty · 04-29-2021, 10:29 PM

been noticing a vibration lately, I can feel it in my left foot on the floorboard.
engine shakes a bit and funky that it's not all the time. car drives fine, no changes in power or running etc, took a stethoscope to the timing chain area and heard nothing loud or abnormal from there.
but I did take a video of the car. let me know if you think it's motor mounts.

is that too much movement for these cars leading to the culprit being motor mounts?

sigtwenty · 05-15-2021, 08:30 PM

anyone?

Billfitz · 05-15-2021, 09:56 PM

That's a pretty fair amount of movement. Changing them shouldn't be that bad of a job. Most of the process involves taking off the bottom shield and charge pipe. You may only need to change the left side.

sigtwenty · 05-16-2021, 11:36 AM

Quote:

Originally Posted by Billfitz

That's a pretty fair amount of movement. Changing them shouldn't be that bad of a job. Most of the process involves taking off the bottom shield and charge pipe. You may only need to change the left side.

thanks. the other day I put my foot as far forward against the floorboard and i felt tapping under it. and I've also noticed it only does it under certain conditions such as on a hill.

literally no noise under the timing cover at all. I put a stethoscope all along the front cover and along the timing chain areas and heard almost nothing.

Billfitz · 05-16-2021, 12:22 PM

A hill puts more stress on the drive train, so a bad motor mount will be more evident there. You don't need a stethoscope to hear timing chain whine, just remove the oil filler cap.

wilbur_the_goose · 05-18-2021, 02:42 PM

I had some busted mounts on my E92 a few years ago. Was driving about 40 MPH and all of a sudden, it started vibrating like crazy. Drove it about 10 miles home and had it lifted to the BMW dealer (warranty repair). They had it for about a week. but got it done.

It's a safety concern - I wouldn't drive your car with bad mounts.

04-29-2021, 10:29 PM	#1
sigtwenty Private First Class 71 Rep 113 Posts Drives: 2015 F30 / 2001 E38 Join Date: Dec 2019 Location: Las Vegas iTrader: (0)	F30 N20 motor mounts? been noticing a vibration lately, I can feel it in my left foot on the floorboard. engine shakes a bit and funky that it's not all the time. car drives fine, no changes in power or running etc, took a stethoscope to the timing chain area and heard nothing loud or abnormal from there. but I did take a video of the car. let me know if you think it's motor mounts. is that too much movement for these cars leading to the culprit being motor mounts?
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05-15-2021, 08:30 PM	#2
sigtwenty Private First Class 71 Rep 113 Posts Drives: 2015 F30 / 2001 E38 Join Date: Dec 2019 Location: Las Vegas iTrader: (0)	anyone?
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05-15-2021, 09:56 PM	#3
Billfitz General 9798 Rep 18,312 Posts Drives: '15 328iX GT Join Date: Jan 2015 Location: New Hampshire iTrader: (0)	That's a pretty fair amount of movement. Changing them shouldn't be that bad of a job. Most of the process involves taking off the bottom shield and charge pipe. You may only need to change the left side.
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05-16-2021, 12:22 PM	#5
Billfitz General 9798 Rep 18,312 Posts Drives: '15 328iX GT Join Date: Jan 2015 Location: New Hampshire iTrader: (0)	A hill puts more stress on the drive train, so a bad motor mount will be more evident there. You don't need a stethoscope to hear timing chain whine, just remove the oil filler cap.
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05-18-2021, 02:42 PM	#6
wilbur_the_goose Major 431 Rep 1,321 Posts Drives: 2023 G30, 2024 F44 Join Date: Apr 2010 Location: Metro Philly iTrader: (0)	I had some busted mounts on my E92 a few years ago. Was driving about 40 MPH and all of a sudden, it started vibrating like crazy. Drove it about 10 miles home and had it lifted to the BMW dealer (warranty repair). They had it for about a week. but got it done. It's a safety concern - I wouldn't drive your car with bad mounts.
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