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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Mechanical Maintenance and TSBs: Break-in / Oil & Fluids / Servicing / TSBs and Service Bulletin > Oil drain plug snapped
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      09-27-2019, 05:07 AM   #1
NYOreo23
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Exactly what it says fellas.
Doing an oil change on her which I've done a bunch already and the head of the plug snapped.

Very slow drain of oil tells me that the other part of the plug is still screwed into the thread. Got late so I just left the car on jacks to drain the rest of the night so I can try to extract with a screw extractor in the morning.

Gonna have to stop by the dealer and get a new plug, hopefully they have some in stock. Parts department was closed when I called

Any tips? I now for sure if imma use the extractor don't fully drill a whole in it, avoid metal shavings inside as much as possible.
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      09-27-2019, 01:09 PM   #2
montr
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You will need a left-hand drill bits and a screw extractor.
https://www.harborfreight.com/screw-...-pc-61981.html

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      09-27-2019, 01:14 PM   #3
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Oh man, that sucks. Just take it slow. Hopefully you won't have to drop the pan.
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      09-27-2019, 02:12 PM   #4
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Literally saved.

Once I got a clear view of it in the light, I noticed there was little bit of lip still left on bolt. Was able to slowly back it out of the threads with a small flat head.
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      09-27-2019, 02:41 PM   #5
n00bkiller944
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Nice save!
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      09-27-2019, 03:10 PM   #6
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Like a boss!
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      09-27-2019, 04:41 PM   #7
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Is the plug aluminum?
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      09-27-2019, 05:18 PM   #8
F32Fleet
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Whew....
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"Drive more, worry less. "

435i, MPPK, MPE, M-Sport Line
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      09-28-2019, 01:16 PM   #9
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Is that an aftermarket drain plug? Looks like a magnetic pick-up on the end. Looks like it might be aluminum with the magnetic insert?
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      09-28-2019, 02:20 PM   #10
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The composition of the plug looks like aluminum. Maybe this one:
https://www.amazon.com/PitVisit-Magn...75334576&psc=1
It's not as durable as a steel plug, but if you're going to strip some threads better to do it to the plug than the pan. The rod in the center is a magnet.
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      09-28-2019, 03:35 PM   #11
catskillclimber
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I don't think you'll find many aluminum fasteners spec'd for reuse. The fracture appears to be right at a stress point, where the threads start. Heat cycles, repeated stretching, and a material with fatigue issues...not a good combination.
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      09-29-2019, 10:32 PM   #12
NYOreo23
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Quote:
Originally Posted by Billfitz View Post
The composition of the plug looks like aluminum. Maybe this one:
https://www.amazon.com/PitVisit-Magn...4576&psc=1
It's not as durable as a steel plug, but if you're going to strip some threads better to do it to the plug than the pan. The rod in the center is a magnet.
Yea it's that exact one. Definitely learned my lesson, got two uses out of it. Kinda got suckered into the whole good to have magnetic plug just as a precaution.

Went back to the OEM steel plug real quick haha
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      09-30-2019, 08:32 AM   #13
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I have one that I got from ECS, three oil changes so far, no problems. Looking about magnetic plugs all seem to be aluminum. I bet there has to be a break in the magnetic field between the magnet and the steel of the pan, otherwise debris won't stick only to the magnet. Using aluminum for a non-load bearing bolt shouldn't be a problem, but it certainly won't withstand over-torquing to the extent that steel will.
IMO the main benefit to a magnetic plug isn't debris removal, it's that you'll see debris on it, telling you that you've got a problem and you should get the engine checked out or sell the car post haste.
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      09-30-2019, 09:01 AM   #14
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From my materials lab school, the fracture shape looks like a classic over torque problem.
Can't be a he man on aluminum fasteners.
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