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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Well that was fun, change your motor mounts if low



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      01-12-2018, 02:07 PM   #1
redWhino
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Well that was fun, change your motor mounts if low

2007 e91 135k miles
330 intake, AA headers, AA tune

The PPI I got on the car a couple years ago said one motor mount was sitting a little low. My dumbass forgot about it til just recently, though I never have heard of a motor mount imploding.

Sure enough, driving relatively easy compared to my usual, I downshifted to second while entering a roundabout. Immediately upon full clutch engagement I get a yellow battery light, yellow engine light, and the car seemed to go into limp mode/worse. I immediately pulled over and cut the engine.

It turns out my front passenger side motor mount just disintegrated. If I'm remembering what my mechanic told me correctly, the engine torqued down on my sub-frame, and killed my water pump and the wiring to the pump and blew a few fuses. I'm trying to get pictures of the old and new motor mount side by side. The difference in height is easily an inch. Looking squarely at the old mount, the entire black rubber piece from which the screw comes out is flush with the top of the metal, as opposed to sitting an inch higher like the new mount.

All in all $1400 later I have new motor mounts, water pump, and thermostat. So I got that going for me, which is nice. I'm aware that BMW's are best driven hard and all fixes preventative as opposed to after something breaks. Lesson learned.
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      01-12-2018, 02:22 PM   #2
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Quote:
Originally Posted by redWhino View Post
2007 e91 135k miles
330 intake, AA headers, AA tune

The PPI I got on the car a couple years ago said one motor mount was sitting a little low. My dumbass forgot about it til just recently, though I never have heard of a motor mount imploding.

Sure enough, driving relatively easy compared to my usual, I downshifted to second while entering a roundabout. Immediately upon full clutch engagement I get a yellow battery light, yellow engine light, and the car seemed to go into limp mode/worse. I immediately pulled over and cut the engine.

It turns out my front passenger side motor mount just disintegrated. If I'm remembering what my mechanic told me correctly, the engine torqued down on my sub-frame, and killed my water pump and the wiring to the pump and blew a few fuses. I'm trying to get pictures of the old and new motor mount side by side. The difference in height is easily an inch. Looking squarely at the old mount, the entire black rubber piece from which the screw comes out is flush with the top of the metal, as opposed to sitting an inch higher like the new mount.

All in all $1400 later I have new motor mounts, water pump, and thermostat. So I got that going for me, which is nice. I'm aware that BMW's are best driven hard and all fixes preventative as opposed to after something breaks. Lesson learned.
Glad to see you got that worked out.

BMWs are best driven hard?
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      01-12-2018, 02:27 PM   #3
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Yeah I was thinking of doing mine this summer. The N55 looks fairly straight forward.
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      01-12-2018, 02:27 PM   #4
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BMWs are best driven hard?
Not just BMWs, women as well.
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      01-12-2018, 02:34 PM   #5
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Curious to why not just get the Oil Pan Gasket done as well since the tech was all up under there already?
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      01-12-2018, 03:20 PM   #6
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Quote:
Originally Posted by redWhino View Post
2007 e91 135k miles
330 intake, AA headers, AA tune

The PPI I got on the car a couple years ago said one motor mount was sitting a little low. My dumbass forgot about it til just recently, though I never have heard of a motor mount imploding.

Sure enough, driving relatively easy compared to my usual, I downshifted to second while entering a roundabout. Immediately upon full clutch engagement I get a yellow battery light, yellow engine light, and the car seemed to go into limp mode/worse. I immediately pulled over and cut the engine.

It turns out my front passenger side motor mount just disintegrated. If I'm remembering what my mechanic told me correctly, the engine torqued down on my sub-frame, and killed my water pump and the wiring to the pump and blew a few fuses. I'm trying to get pictures of the old and new motor mount side by side. The difference in height is easily an inch. Looking squarely at the old mount, the entire black rubber piece from which the screw comes out is flush with the top of the metal, as opposed to sitting an inch higher like the new mount.

All in all $1400 later I have new motor mounts, water pump, and thermostat. So I got that going for me, which is nice. I'm aware that BMW's are best driven hard and all fixes preventative as opposed to after something breaks. Lesson learned.
Looking forward to pics. At a 135k, that's pretty impressive for the original motor mounts to last that long.
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      01-12-2018, 04:43 PM   #7
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I feel BMW's run better longer when driven spiritedly, engine specifically. That being said it also requires diligent maintenance. I'm not talking power shifting, red lining, long drives without a cool down. I simply mean spirited driving, pulling through 5-6k+ rpm's now and again. You know, a good old fashioned 'Italian tuneup' lol. Maybe I'm just an asshole who likes to drive fast.

As far as the oil pan gasket, that is next to be addressed. I didn't get it done because he wasn't exactly "right there already", and I already had a $1460 bill three days after Christmas.

Oil pan gasket, valve cover gasket, and vanos/vanos solenoid are coming within a month or so.
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      01-12-2018, 05:44 PM   #8
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Doing mine this weekend actually. When I did my turbos a while back I could tell they were definitely on their way out, I've been worried since but finally going to get it done.
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      01-12-2018, 06:13 PM   #9
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Originally Posted by IllSic_Design View Post
Doing mine this weekend actually. When I did my turbos a while back I could tell they were definitely on their way out, I've been worried since but finally going to get it done.
How miles are you at right now if you don't mind me asking?
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      01-12-2018, 07:31 PM   #10
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Quote:
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How miles are you at right now if you don't mind me asking?
159.7k
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