[Moffo]

Hey yall, I made a very rookie mistake of overtightening my lug bolts on my 2017 F32 coupe. Around 1-2 are stripped on each hub. Is it possible to retap the threads for the wheel hub or perhaps use helicoils? I heard helicoils were a lot safer to do and relatively cheaper than replacing hubs. If I were to do helicoils, what places could do the labor for me? If I were to get all new hubs, how much would that run me? Thank you in advance!

[328iX]

Originally Posted by Moffo

Hey yall, I made a very rookie mistake of overtightening my lug bolts on my 2017 F32 coupe. Around 1-2 are stripped on each hub. Is it possible to retap the threads for the wheel hub or perhaps use helicoils? I heard helicoils were a lot safer to do and relatively cheaper than replacing hubs. If I were to do helicoils, what places could do the labor for me? If I were to get all new hubs, how much would that run me? Thank you in advance!

Damn what in the world did you use to tighten them I've seen them over 150ft lb without issue lol.

I would replace the hub personally so you don't have to deal with using different size bolts as well as a safety concern.

[Wires]

Replace hub or experience potential injury or death. You had to go REALLY hardcore to do that.

[AlmondJayRoM3]

Get your car towed towed to a shop and get the hubs replaced. Not worth the risk with helicoils. While the car is in a shop get a torque wrench so this doesn’t happen again.

[psyki]

I have a hard time believing that you actually stripped threads unless you had the world's most powerful impact gun or a long ass breaker bar. Chances are you just cross threaded it but still there no decent fix for ruined threads there, replace the hub and get a torque wrench.

[John in VA]

You could try a thread chaser to clean up the threads if you cross-threaded them.

[Billfitz]

Tap them for 16mm x 1.5 bolts. The drill size for the 16mm tap is 14mm, the same as the original bolt diameter. Do them all, you don't want to be messing with two different size bolts. You may have to drill the wheels to fit the new bolts.

[Moffo]

Originally Posted by 328iX

Damn what in the world did you use to tighten them I've seen them over 150ft lb without issue lol.

I would replace the hub personally so you don't have to deal with using different size bolts as well as a safety concern.

I asked my friend about it, after you mentioned that. At the time, I was running 4 lug bolts each wheel cause my aftermarket ones were coming in. He actually gave me his spare lug bolt which he thought was 14x1.25 but it was actually 14x1.5 so I'm pretty certain that played a part into why I was able to strip them. I can't even place my oem bolts into that slot without using a lot of force anymore. Yeah, one stupid mistake lol.

[Moffo]

Originally Posted by psyki

I have a hard time believing that you actually stripped threads unless you had the world's most powerful impact gun or a long ass breaker bar. Chances are you just cross threaded it but still there no decent fix for ruined threads there, replace the hub and get a torque wrench.

Any idea how much 4 new hubs and replacement labor would run me?

[bbq]

Originally Posted by Moffo

I can't even place my oem bolts into that slot without using a lot of force anymore. Yeah, one stupid mistake lol.

If the bolt won't go in easily then it sounds more like it is cross threaded. If the thread is stripped it would go in with almost no effort or just spin.

Try a thread chaser (not a tap) first before doing anything else.

[Moffo]

Originally Posted by bbq

If the bolt won't go in easily then it sounds more like it is cross threaded. If the thread is stripped it would go in with almost no effort or just spin.

Try a thread chaser (not a tap) first before doing anything else.

Relatively unfamiliar with this but is there any sort of brand/size/anything I should know to purchase the right kit? And what sort of shops may be able to do this for me because I'm afraid to fuck it up more. I cross threaded with 14x1.5mm if that helps.

[BWbimmer]

I guess we would be looking for something like this

https://www.amazon.de/DIN13-Manual-R...dDbGljaz10cnVl

Me personally would not take the risk.

Hardware around 400$ for the front axle and 200$ for the rear, OEM parts.

[bbq]

Originally Posted by Moffo

Relatively unfamiliar with this but is there any sort of brand/size/anything I should know to purchase the right kit? And what sort of shops may be able to do this for me because I'm afraid to fuck it up more. I cross threaded with 14x1.5mm if that helps.

Something like this:

https://www.autozone.com/test-scan-and-specialty-tools/thread-repair/oemtools-m14-1-25-limited-access-thread-chaser/607068_0_0

This basically "clean" up your existing thread.

[Billfitz]

Originally Posted by Moffo

Relatively unfamiliar with this but is there any sort of brand/size/anything I should know to purchase the right kit?

I already told you what to get, 16mm x 1.5 bolts, 16mm x 1.5 tap, 14mm drill bit. A well equipped shop should already have the tap and drill bit. This job is well within the scope of any halfway competent DIY mechanic.

Any idea how much 4 new hubs and replacement labor would run me?

I'd guess around a grand. Two grand at a BMW dealer.

[Juice247]

My BMW shop charged $760 to replace one hub my tire guy messed up. Hub and 4 bolts (the ones that hold the hub on must be replaced as they are one time use only) on FCP Euro are around $340 per wheel. Then you'll also want new studs.

If you can do brakes, you can do a hub, but the bolts in the back are a pain to get to.

[dmaxdmax]

OP, I would start first, as suggested, by trying to chase the threads and see what torque you can hold on it after that.

Your wheels will stay on with only four bolts, but I wouldn't track or drift. You don't need to panic too much about your safety, unless you're planning on speeding stupid fast on public roads.

If it doesn't take the torque you need, then I like Bill's idea of tapping that hole and using a larger lug bolt. I'd do that before buying four new hubs.

I had a stripped thread before...took 10 mins. for my shop to chase the threads--bet you'll find enough. Easy to find the proper tap and technique to use it--it'll cost you maybe $20.

[BWbimmer]

Save yourself the cost for the front:

https://www.youtube.com/watch?v=TV-eK2i0fbs

[Moffo]

Originally Posted by Billfitz

I already told you what to get, 16mm x 1.5 bolts, 16mm x 1.5 tap, 14mm drill bit. A well equipped shop should already have the tap and drill bit. This job is well within the scope of any halfway competent DIY mechanic.
I'd guess around a grand. Two grand at a BMW dealer.

Yeah I appreciate it the reply but I wanna see if I can chase the thread first likes the others said, if not I will try out your suggestion and thank you for the quote!

[Moffo]

Originally Posted by dmaxdmax

OP, I would start first, as suggested, by trying to chase the threads and see what torque you can hold on it after that.

Your wheels will stay on with only four bolts, but I wouldn't track or drift. You don't need to panic too much about your safety, unless you're planning on speeding stupid fast on public roads.

If it doesn't take the torque you need, then I like Bill's idea of tapping that hole and using a larger lug bolt. I'd do that before buying four new hubs.

I had a stripped thread before...took 10 mins. for my shop to chase the threads--bet you'll find enough. Easy to find the proper tap and technique to use it--it'll cost you maybe $20.

Yeah I have no plans for track or drift currently. I found a shop that said they can chase the thread or restore it to how it was, they just need the OEM bolts which I ordered. Will definitely see how they can fix it and if they are able to apply the PROPER torque needed for the wheel lugs.

[Moffo]

Originally Posted by BWbimmer

Save yourself the cost for the front:

https://www.youtube.com/watch?v=TV-eK2i0fbs

Thank you! I will likely replace the hubs down the line when I get some more money since I dropped money on wheels which should come in a few months. Maybe by then, I'll have enough for new hubs if the threads can be chased properly!

[BWbimmer]

Originally Posted by Moffo

Thank you! I will likely replace the hubs down the line when I get some more money since I dropped money on wheels which should come in a few months. Maybe by then, I'll have enough for new hubs if the threads can be chased properly!

Keep us updated

[Moffo]

Originally Posted by BWbimmer

Keep us updated

Will do! New lug bolts should be here soon and will be hitting shop probably early next week!