General Category > General Discussion
Problem with cooling system S1000RR
jakutash:
--- Quote from: Kogeltje on October 17, 2021, 12:21:45 PM ---I also had some cooling issues last year.
Replaced the Coolant and bleeded all the air.
Make sure you bleed Out all the air from the system.
Turns out my radiator cap was broken. Replaced That and No issues anymore.
Brentuning also adjusted the fan temp to 85celcius. So the bike runs cooler.
It would be a great feature to set the fan temp with the GS-911.
--- End quote ---
Hi bro. Yeah first of all i change my radiator cap. Then new coolant. i Also have BT flash/ but was steel hot. Then i changed termostat, i cant correctly check it, because it is very cold outside...
By the way how to check this: Make sure you bleed Out all the air from the system.
How correctly?
BMWS1KRR:
--- Quote from: Ruan on September 09, 2021, 09:57:52 AM ---Hi Jakutash
For diagnosing and issue like this, the GS-911 can be used to run an autoscan/read fault codes on your engine ECU, which will display any faults that are detected as either previously present, or currently present. What this means is that in the event that the thermostat is not sending the expected values to your bike's ECU, a fault code will be thrown on your ECU - this can be used to confirm that the problem is in fact the thermostat, and you can proceed to replace it.
The GS-911 also allows reading and logging of real time values - this can be used to check specific values relating to your cooling system, which can also help to identify where exactly the problem is.
Please feel free to let us know if you have any questions.
Kind regards
Ruan
--- End quote ---
Here is your possible problem. Speed vs air flow.
First of all the S1000RR was not designed for commuter traffic. You cannot poke along at 20-40KPH and get enough air flow across the radiator for the cooling effect to be efficient. So then there is the electric fan. Turning on the electric fan does nothing for the S1000RR because it is too small and there is only one. There is only one for weight saving. There is only one because BMW Motorrad never designed the S1000RR to be anything but a canyon carving / road racing bike. Riding on the street is a luxury that can be done, as long as you are moving at least 50KPH.
Turing the fan on early can effect the fueling on cold start up mornings as well. The engine is designed around 180-205F. Fan on is 212F ( 100C ) .. that is when some cooling can take effect to help in dissipate heat back to 180-205F
jakutash:
--- Quote from: BMWS1KRR on November 26, 2021, 08:37:46 PM ---
--- Quote from: Ruan on September 09, 2021, 09:57:52 AM ---Hi Jakutash
For diagnosing and issue like this, the GS-911 can be used to run an autoscan/read fault codes on your engine ECU, which will display any faults that are detected as either previously present, or currently present. What this means is that in the event that the thermostat is not sending the expected values to your bike's ECU, a fault code will be thrown on your ECU - this can be used to confirm that the problem is in fact the thermostat, and you can proceed to replace it.
The GS-911 also allows reading and logging of real time values - this can be used to check specific values relating to your cooling system, which can also help to identify where exactly the problem is.
Please feel free to let us know if you have any questions.
Kind regards
Ruan
--- End quote ---
Here is your possible problem. Speed vs air flow.
First of all the S1000RR was not designed for commuter traffic. You cannot poke along at 20-40KPH and get enough air flow across the radiator for the cooling effect to be efficient. So then there is the electric fan. Turning on the electric fan does nothing for the S1000RR because it is too small and there is only one. There is only one for weight saving. There is only one because BMW Motorrad never designed the S1000RR to be anything but a canyon carving / road racing bike. Riding on the street is a luxury that can be done, as long as you are moving at least 50KPH.
Turing the fan on early can effect the fueling on cold start up mornings as well. The engine is designed around 180-205F. Fan on is 212F ( 100C ) .. that is when some cooling can take effect to help in dissipate heat back to 180-205F
--- End quote ---
do you recommend me to turn on the fans early or still stock value?
about airflow and design is questionable because I have friends who ride these bikes in Dubai and they say they have never experienced such problems
BMWS1KRR:
Look at the fan. Do you really think it is large enough to create maximum cooling effect at low speeds to sitting at a red light? Its designed to work in a pit lane situation where you are waiting on the release of the bikes on the track.
This guy wrote a good reference to the cooling system and design.
https://www.bmwhp.com/should-changes-be-made-to-fan-on-temperature-setting-in-ecu/
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