Warranty stuff » Damaged threads

Recently changed out the front tire on my new 2020RS - about 2800 miles. When I removed the calipers, the top bolt on the left hand caliper felt like it had blue loctite on it as there was a constant drag while unscrewing the bolt. To my knowledge the calipers have not been touched since factory assembly.
Inspected the bolt and found a fragment of aluminum wrapped in the bolt thread. The end of the bolt looks like it had been damaged with a chisel. Borescoped the internal threads and they are pretty well mucked up.

When I first got the bike, I had a similar issue with one of the attachments for the rear pannier mounts.

Just curious if anyone has seen this issue before on a "new" bike. I have had several bikes over the years and this is the first time I have experienced this issue.

TIA,
Bill

Makes sense. Had not thought of the front wheel being installed as part of dealer preparation for delivery.

Will be interesting when I take the bike into the dealer next week.

Zitat von Unkgd im Beitrag #1

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Recently changed out the front tire on my new 2020RS - about 2800 miles. When I removed the calipers, the top bolt on the left hand caliper felt like it had blue loctite on it as there was a constant drag while unscrewing the bolt. To my knowledge the calipers have not been touched since factory assembly.
Inspected the bolt and found a fragment of aluminum wrapped in the bolt thread. The end of the bolt looks like it had been damaged with a chisel. Borescoped the internal threads and they are pretty well mucked up.

When I first got the bike, I had a similar issue with one of the attachments for the rear pannier mounts.

Just curious if anyone has seen this issue before on a "new" bike. I have had several bikes over the years and this is the first time I have experienced this issue.

TIA,
Bill

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Zitat von JohnnyRockett im Beitrag #5

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Zitat von Unkgd im Beitrag #1

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Recently changed out the front tire on my new 2020RS - about 2800 miles. When I removed the calipers, the top bolt on the left hand caliper felt like it had blue loctite on it as there was a constant drag while unscrewing the bolt. To my knowledge the calipers have not been touched since factory assembly.
Inspected the bolt and found a fragment of aluminum wrapped in the bolt thread. The end of the bolt looks like it had been damaged with a chisel. Borescoped the internal threads and they are pretty well mucked up.

When I first got the bike, I had a similar issue with one of the attachments for the rear pannier mounts.

Just curious if anyone has seen this issue before on a "new" bike. I have had several bikes over the years and this is the first time I have experienced this issue.

TIA,
Bill

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I had a similar issue on a car ( not under warranty) I had to use stainless steel helicoils on the threaded holes.. and they are now arguably stronger than before. Manufacturers seem to use the strongest thread lock fluid ,which when using a steel bolt in an alloy threaded hole, can rip the alloy thread out. Replacement forks or helicoils are the only solution. BMW might blame you for the damage.. which would be unfair.. good luck with this .. caliper bolts should only have the weaker thread lock fluid not the super strong one.

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Not always

Took the bike into the dealer yesterday and the response was as expected. They have to check with BMW but think BMW will decline to warranty.

I took pictures of the damaged threads and the bolt and sent them to the dealer today.

Will be interesting to see what the reply will be.

Bill

PS- There was no Loctite applied to the bolt. I was trying to indicate what the drag felt like as I was removing the bolt.

in the absence of loctite, then the only explanation can be the

'ham-fisted Gorilla who cross threadded the bolt but kept on turning the wrench until it was someone else's problem.... '

if they refuse to honour your warranty, then an engineering company will Helicoil the bolt holes for you, and it will be stronger than before, and use the same size bolts.

Again good luck,

It can be repaired.

you could even do it yourself... I did on my car caliper mount .

here is a how to vid i found on Youtube
https://youtu.be/9rtiFBC0wms

Zitat von Unkgd im Beitrag #8

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Took the bike into the dealer yesterday and the response was as expected. They have to check with BMW but think BMW will decline to warranty.

I took pictures of the damaged threads and the bolt and sent them to the dealer today.

Will be interesting to see what the reply will be.

Bill

PS- There was no Loctite applied to the bolt. I was trying to indicate what the drag felt like as I was removing the bolt.

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Quick Update - Finally got a response late Tuesday this week that BMW will cover the replacement (labor and parts) of the damaged lower stanchion. Took a bit longer than a month to get both BMW and the dealer to finally resolve the issue. Dealer wanted to be assured that the cost of the repair would be covered. COVID-19 apparently precludes site visits any more from the BMW area representative, so everything was communicated via email.

Dealer states the parts are on order and I expect that the bike will be in for repair in the next two weeks.

Good thing I have a few other bikes to ride in the interim :-).

Bill

Thats a great result... well done!

First, there's a video on youtube that shows an R1250RS being uncrated and the front wheel is installed.

Next, I installed the MaMo X heads on mine and when I went to install the bottom screws, I slightly cross threaded the rear bottom screws on both sides. Or, I thought I did. When it didn't feel right, I stopped and chased the threads with the right size tap.

On the one hand, the way the X Heads are designed, it makes it easy to cross thread because the rubber needs to be compressed a bit to align the holes. On the other hand, I did that and I'm not convinced the threads weren't bunged up from the start.

Zitat von Unkgd im Beitrag #1

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Recently changed out the front tire on my new 2020RS - about 2800 miles. When I removed the calipers, the top bolt on the left hand caliper felt like it had blue loctite on it as there was a constant drag while unscrewing the bolt. To my knowledge the calipers have not been touched since factory assembly.
Inspected the bolt and found a fragment of aluminum wrapped in the bolt thread. The end of the bolt looks like it had been damaged with a chisel. Borescoped the internal threads and they are pretty well mucked up.

When I first got the bike, I had a similar issue with one of the attachments for the rear pannier mounts.

Just curious if anyone has seen this issue before on a "new" bike. I have had several bikes over the years and this is the first time I have experienced this issue.

TIA,
Bill

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The issue with the X-heads is the angle of the bottom 6 mm torx is "anti-intuitive". It does not go in straight. The same problem existed on the R1200. I found to "get my head around it" I used a small wooden kebab stick to help visualize the correct angle and got the thread started with finger pressure only, and a bit of WD-40.