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Old 01-28-2013, 10:50 PM   #1
Codewheeney OP
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Joined: May 2003
Location: Morgan Hill, CA
Oddometer: 2,634
Skid plate mounting bolt replacement nut

Or, as it's called on the BMW Parts Fiche, "Underride protection"

Picked up my new bike, R1200GS, on Saturday. I was riding today, at about 150 miles on the odometer, and I started to hear a tickity-tick-tick, like I picked up a nail in a tire or something.

Pulled over, and noticed this:



I couldn't find the nut (it was somewhere up the road, I suppose), so I put the bolt back in place and cruised gently into town to the nearest Ace. I bought a stainless lock washer and a stainless nylon lock nut. It's all buttoned up now, but I was thinking:

1. Is this location too hot for a nylon lock nut? Seems like they're good to 250 F, so I think that's fine for something bolted to the bike, but should I just go with a normal nut?

2. Is stainless appropriate since the bolt is not stainless?

3. A quick search didn't show anything pathological, but any wisdom on what else to check for tightness on a newly delivered machine

Thanks,
JC

PS - calling dealer tomorrow to say WTF.
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Old 01-29-2013, 01:25 AM   #2
holckster
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Should be fine.
Are there enough bolt threads beyond the nylock nut for 2nd nut (jam nut)?
Way to clean, better do something about that.

Stop by next time you head for foothills, I'm just off Hwy 88 near Lockeford.
I know some great backroads with lunch destinations thrown in.
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Old 01-29-2013, 05:40 AM   #3
Dan Căta
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Should you not be back in 800 kms since new, back to the dealer, to re-tighten the engine bolts? Is that an engine bolt? QED

I do not think that the nylon on the not will melt from the heat, it is in direct air flow. As for the issue itself, I am thinking that the bike came w/o the protection and the dealer had it mounted locally. Hence the fault. I really doubt Hans at the BMW factory would have left it like that, he would have nightmares at night because of that. Ze germans...

Dan.
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Old 01-29-2013, 05:41 AM   #4
Twilight Error
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McMaster sells high temp locknuts that don't have a nylon insert, the nut uses a deforming metal section for the lock.
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Old 01-29-2013, 08:28 AM   #5
LaurelPerryOnLand
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Lesson learned?

You've now had the opportunity to learn a very valuable lesson:

You need to check the work of anybody else who's tinkered with/serviced your bike.

The most DANGEROUS time to ride is right after some mechanic (you/other/dealer) has removed parts to install or service some other part(s).

Take the time to meticulously go over your bike immediately when you get it back.
Look at and TOUCH everything to insure it's TIGHT or works as it should.

Someday...ask me about the airplane mechanic who just finger tightened 3 of the 6 fuel injectors in my airplane.
I found out about it at 12,000 feet!
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Old 01-29-2013, 08:43 AM   #6
milo
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I agree. My friend took his new GS for it's first service then rode it 125 miles home. Next day it was parked in my drive and we were admiring the bike when we noticed oil dripping. The engine oil drain bolt was backing out, not even finger tight! It could have been pretty bad when the bolt came all the way off and dumped the oil out. But we were actually quite relieved that the dripping wasn't coming from the rear main or counter-balance shaft seal.
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Old 01-29-2013, 09:15 AM   #7
Codewheeney OP
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Thanks for the input. I'll stick with my fix for now.

LPOL: this ain't my first rodeo, that's for sure. I had my 1150 come back from a service (different dealer) with a loose transmission filler plug, so I give the bike a good once over when someone else touches it. Fresh from the factory floor (or dealership floor) is most double plus un-good, however. Thorough inspection scheduled for this afternoon... but, gotta ask - I guess the three fully tightened fuel injectors were enough to get you home? Any fire from the three loose ones?
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Old 01-29-2013, 09:29 AM   #8
LaurelPerryOnLand
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Quote:
Originally Posted by Codewheeney View Post
Thanks for the input. I'll stick with my fix for now.

LPOL: this ain't my first rodeo, that's for sure. I had my 1150 come back from a service (different dealer) with a loose transmission filler plug, so I give the bike a good once over when someone else touches it. Fresh from the factory floor (or dealership floor) is most double plus un-good, however. Thorough inspection scheduled for this afternoon... but, gotta ask - I guess the three fully tightened fuel injectors were enough to get you home? Any fire from the three loose ones?
No...it was the dead of Winter. Mechanic who discovered/fixed when I made it one hour to my destination advised me that the results would have been different during the Summer. The 3 loose injectors were UNFORTUNATELY on the same side of the engine as the HOT MUFFLER! Atomized mist went right past the muffler.

Glad to hear you're a rodeo veteran.

Perhaps some noob will read my post and potentially benefit.
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Old 01-29-2013, 09:55 AM   #9
Codewheeney OP
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Quote:
Originally Posted by LaurelPerryOnLand View Post
No...it was the dead of Winter. Mechanic who discovered/fixed when I made it one hour to my destination advised me that the results would have been different during the Summer. The 3 loose injectors were UNFORTUNATELY on the same side of the engine as the HOT MUFFLER! Atomized mist went right past the muffler.
Failure at 0 feet, I can handle. Failure at 12K is really scary.

Quote:
Originally Posted by LaurelPerryOnLand View Post
Perhaps some noob will read my post and potentially benefit.
And buy Loctite by the gallon....

JC
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Old 01-29-2013, 08:00 PM   #10
slartidbartfast
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If you used a stainless locknut in addition to a nylock nut then who cares of the nylon melts (it won't BTW)
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