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2Addicts | BMW 2-Series forum Technical Topics B58 (M240i) Engine, Transmission, Exhaust, Tuning B58 downpipe/midpipe clamp (nut) spinning freely

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      07-29-2024, 12:34 PM   #1
Evanp363
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B58 downpipe/midpipe clamp (nut) spinning freely

I had to put a ton of torque on the nut for it to start moving in the first place, but now the bolt just spins whenever i try to loosen the nut. i can’t find a size socket that fits on the top of the bolt. i don’t know what to do.
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      07-29-2024, 12:49 PM   #2
Dantesboyz
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Might have to get a wrench/ratchet on it from both ends.

If you got it broke loose a few turns and then this happened... it's likely the slots of the clamp are not holding the hex head of the bolt on the underside, no worries.
Sometimes the clamp doesn't spring open as you loosen the bolt, so the gravity let's the "trapped" hex head move out the slot of the clamp where it can spin freely.

Hope that helps
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2017 F22 M240i, Xdrive, M Performance Package
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To do next list- #1- Wheel Spacers & Tires, #2- B58 TU Pump, #3- Flex Fuel Kit
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      07-29-2024, 12:52 PM   #3
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Quote:
Originally Posted by Dantesboyz View Post
Might have to get a wrench/ratchet on it from both ends.

If you got it broke loose a few turns and then this happened... it's likely the slots of the clamp are not holding the hex head of the bolt on the underside, no worries.
Sometimes the clamp doesn't spring open as you loosen the bolt, so the gravity let's the "trapped" hex head move out the slot of the clamp where it can spin freely.

Hope that helps
Yeah i believe that’s what happened as well. i just have to figure out what size the hex is. none of my sockets fit i think because it is rusty
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      07-29-2024, 02:13 PM   #4
Dantesboyz
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Trying to remember what mine was from last year, I think a 13 or 14 mm.

Kern might reference in his dp install video
kern YT DP band vid
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2017 F22 M240i, Xdrive, M Performance Package
Active Autowerke Downpipe, Dinan Carbon Fiber Intake, Dinan Carbon Fiber Turbo Inlet, Dinan Mid-pipe, xHP Flashtool, MHD Stage 2
To do next list- #1- Wheel Spacers & Tires, #2- B58 TU Pump, #3- Flex Fuel Kit
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      07-29-2024, 03:43 PM   #5
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Quote:
Originally Posted by Dantesboyz View Post
Trying to remember what mine was from last year, I think a 13 or 14 mm.

Kern might reference in his dp install video
kern YT DP band vid
I just checked from the engine bay and the top is a carriage bolt. I’m not exactly sure how to get it out now because I think the part of the clamp that was holding the carriage bolt still is probably broken or it just wasn’t supposed to be a carriage bolt in the first place. It’s completely smooth on the top and I can’t get anything to hold it still.
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