Of course you're right, I meant coolant temperature.
R1250GS Rattling noise
- Thread starter scarab1987
- Start date
I filed mine under 'cheap shit fuel' but the rattle is there at times but certainly no where near as bad.
Like the poster above I am thinking there is a relationship with high air temperatures as it was a really hot day when I experienced severe rattle.
Like the poster above I am thinking there is a relationship with high air temperatures as it was a really hot day when I experienced severe rattle.
The FI system on the Hexhead had an air intake temperature sensor in the air box. Does the 1250 have the same? I assume it would.
If the noise is related to ambient air temperature, this would be a correction factor in the FI mapping, which could be the cause of the problem or at least a major factor.
If the noise is related to ambient air temperature, this would be a correction factor in the FI mapping, which could be the cause of the problem or at least a major factor.
scarab1987
Registered user
Of course it has an intake air temperature sensor.
Incase anyone wants to consider the temperature possibiity.
Ride out today.
Ambient air temps ranged from 15 to 21 deg.
Coolant temp cycled between 78 and 88 deg as thermostat open and closed.
End of ride manouvering on the drive coolsnt temp reached 100deg. Fans kicked in and out at 96deg. Otherwise never heard them all day.
Ride out today.
Ambient air temps ranged from 15 to 21 deg.
Coolant temp cycled between 78 and 88 deg as thermostat open and closed.
End of ride manouvering on the drive coolsnt temp reached 100deg. Fans kicked in and out at 96deg. Otherwise never heard them all day.
Forgot to add the bike ran flawlessly. Only once did I detect a slight rattle under moderate acceleration .
sven
Registered user
The dealer has asked BMW if they can replace the engine, but BMW reckon the issue is rattling throttle bodies. Let’s see if this cures the problem…..Well, I’m down in Wales for the weekend on the loan RT as there’s been no update since last week when they said the exhaust change had made no difference and they hadn’t tried owt else as they were busy with “booked jobs”. Obviously the £18k I spent on the GSA in their shop doesn’t make me a valued customer. It’s not like I’ve been a customer of theirs for 25 years
At least I’ve still got the RT for weekend fun.
scarab1987
Registered user
There is a noise that comes from throttle butterflies but this thread doesn't describe this noise. Throttle bodies produce a whistling noise under acceleration. Imagine that there are dealers that replaced complete engines because of this rattling, and BMW factory accepted that. If were throttle bodies, they wouldn't accept replacement.
A mates late model 1150GSA developed a ticking noise from his throttle bodies, very noticeable at idle, it was the butterfly shafts. ISTR you could get a kit to modify them (made by Bing ?) by replacing the throttle butterfly arm bushings. In his case he had new ones fitted which cured it.
I don't buy into BMW's hypothesis regarding the 1250 throttle butterflies..
If the throttle butterflies really are rattling on the 1250 they must be pretty badly worn to heard at 2500rpm+ over the wind and road noise ? I appreciate they are much higher up above the cylinders but even so, you should be able to replicate the noise whilst on the centrestand.
I don't buy into BMW's hypothesis regarding the 1250 throttle butterflies..
If the throttle butterflies really are rattling on the 1250 they must be pretty badly worn to heard at 2500rpm+ over the wind and road noise ? I appreciate they are much higher up above the cylinders but even so, you should be able to replicate the noise whilst on the centrestand.
Are they going to pay you the difference in cost?
sven
Registered user
I'm extremely cynical myself given that it only rattles under load. I think they're grasping at straws to avoid replacing the engine. The dealer doesn't want to strip and rebuild the engine due to the labour hours involved, hence wanting BMW to replace the complete motor, and I don't want a rebuilt engine on a bike that's had a latent defect from the date of purchase.
sven
Registered user
Been back to the dealers today and changing the throttle bodies has made no difference. Apparently BMW aren’t admitting a fault and have basically said suck it up, buttercup Looks like I’m stuck with a rattly bike. I did enquire about a 1300 but the sales guy, who’s sold me a few bikes, said wait for the teething troubles to be ironed out…
Looks like I’m stuck with a rattly bike. I did enquire about a 1300 but the sales guy, who’s sold me a few bikes, said wait for the teething troubles to be ironed out…scarab1987
Registered user
Ask them if they did complete cam timing without passing any step. Most of techs at the dealers don't install the chain tensioner tool because they think that does no difference. That is not true because this small tool does all the difference. I have exact same experience from my dealer, and luckily I was there during cam timing and ask the tech to install that tool. And boom, rattle is gone. After few thousands kms rattle will come back. I know it, that's why my opinion is that the cam gears slip from camshafts after kms passing. Next movement will be tge replacement of friction plates between cam gears and camshafts.Been back to the dealers today and changing the throttle bodies has made no difference. Apparently BMW aren’t admitting a fault and have basically said suck it up, buttercup
scarab1987
Registered user
Same sound but longer when is Dunamic.
yawhgih_gser
Registered user
Same issue, on my bike. R1250GS 2023 (produced in dec 2022), with 28.700 km, bought new with 3km on board, and always used good quality fuel.
I had 0 issues until the 20k service. After this, it started consuming oil ~ 130ml/1000 km (ofc the dealer said it’s ok….) and since a few hundred kms ago (max 1k km) it developed this annoying rattle. Now that I’ve noticed it, it’s hard to ignore it. In my case I can hear it while driving (it comes and goes) or in neutral when the bike is on the side stand.
To replicate the issue, I give it some gentle throttle, release it and then hit the throttle again, the sound it’s clear as daylight, it appears around 3k-5k rpm.
It’s a bit louder in 1st gear when I take off, and engage the clutch (2.5-3.5 k rpm). Even though I ride with earplugs and sometimes with background music at low volume, I can still hear the rattle (Rode/ECO mode, didn’t got the change to test in Dynamic yet)
I had 0 issues until the 20k service. After this, it started consuming oil ~ 130ml/1000 km (ofc the dealer said it’s ok….) and since a few hundred kms ago (max 1k km) it developed this annoying rattle. Now that I’ve noticed it, it’s hard to ignore it. In my case I can hear it while driving (it comes and goes) or in neutral when the bike is on the side stand.
To replicate the issue, I give it some gentle throttle, release it and then hit the throttle again, the sound it’s clear as daylight, it appears around 3k-5k rpm.
It’s a bit louder in 1st gear when I take off, and engage the clutch (2.5-3.5 k rpm). Even though I ride with earplugs and sometimes with background music at low volume, I can still hear the rattle (Rode/ECO mode, didn’t got the change to test in Dynamic yet)
I had very noticable sound in Dynamic, but when riding in Road now, i cant hear it unless i am on cruise control in low rpm. I have also adjusted the cams..
-Strange thing, but will be riding it in Road mode to avoid getting irritated
So what changes between the road and dynamic modes ?
Throttle response (rate of change) and suspension ?
Throttle response (rate of change) and suspension ?
Throttle respons i think.
GelandeStress
Registered user
Hi all, It's been a while and I have an update.
At 15,000 miles, BMW replaced my entire engine (clutch and gearbox included). It rides just like a brand new bike.
This was after they individually replaced the clutch, any worn engine parts, and adjusted the valves with no improvement.
I would suggest to any R1250 owner who's bike has the same rattle as my videos (posted above in the thread) that you contact BMW on social media (if you contact them privately then they will try to ignore you) and demand they replace your engine if they 'can't isolate or diagnose the fault'. It's not safe to have an undiagnosed noise on your vehicle.
Ride safe. GleanedStrasse Stress.
At 15,000 miles, BMW replaced my entire engine (clutch and gearbox included). It rides just like a brand new bike.
This was after they individually replaced the clutch, any worn engine parts, and adjusted the valves with no improvement.
I would suggest to any R1250 owner who's bike has the same rattle as my videos (posted above in the thread) that you contact BMW on social media (if you contact them privately then they will try to ignore you) and demand they replace your engine if they 'can't isolate or diagnose the fault'. It's not safe to have an undiagnosed noise on your vehicle.
Ride safe. Gleaned
Similar threads
