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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > Motor mount bracket to block



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      02-11-2019, 08:17 PM   #1
Mrclean67
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Motor mount bracket to block

While replacing my oil pan gasket I noticed the rear bolt on the motor mount bracket broke. This would be the bolt that goes thru the bracket into the block. I thought this very odd, motor mounts seem in decent shape but I am replacing them while I have the sub frame lowered. Seeing if anyone has run into this before? 07' 328i coupe MT. Keep in mind this was an extremely well maintained BMW, I have every receipt since it was new and 98% of the work was done by BMW. I understand that flukes happen but there's nothing in the receipts that would indicate any work done that would have involved removing that bracket.
I believe from initially looking at it there may be enough bolt sticking out of the block to get a hold of if I remove the mount. Any advice would be greatly appreciated. Ken
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      02-11-2019, 10:01 PM   #2
Mrclean67
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Well I dodged a bullet on that one. Removed the other 3 bolts and bracket and used a regular pair of pliers and it came right out. Whew! Bentley manual states 28 ft\lbs torque, seems low but being aluminum I guess it works.
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      02-12-2019, 01:22 AM   #3
desertman123
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Lucky you! That could've been a big pain in the ass.

And yeah for the torque-to-yield bolts the torque is nice a low.
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      02-12-2019, 02:50 AM   #4
Mrclean67
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Yep I was actually shocked, never got that lucky with a broken bolt before!
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      02-12-2019, 02:21 PM   #5
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this is a common issue with jeep 4.0 motors as well.

nobody has every figured out an answer, other than to make new plates that catch more bolt holes in the block.

the bolts come right out after you break the heads because now there's no more tension on the threads. So unless they're corroded they usually just back out.
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      02-12-2019, 02:49 PM   #6
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Yep nice thing about aluminum to aluminum, steel to steel is a whole different story. And I somehow managed to order the wrong motor mount bolts but just happened to be the bolts for the mounting bracket to block.😁
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