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Thread: Running temperature

  1. #17
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    Quote Originally Posted by Nice 'n' Fat View Post
    You can also assume that if a dealer transfers the guards over from one bike to another that (regardless of make) there will not be an issue with warranty

    Plus (regardless of make) the engine will run at the same temperature as it did when a guard wasn't fitted
    The only way you can be certain is to run the full range of tests including all the extreme corner cases of ambient operating etc.

    If a dealer decides to do it then they accept responsibilty, it’s their call.

    P.S. assumption is the mother of all cock ups.

  2. #18
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    It only holds 250 ml of coolant so that's why it's up and down all the time-- small volume doesn't take much heating/ cooling.
    Slow speed work sees mine creeping up to 95° before the fan cuts in and rapidly brings it down again.

  3. #19
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    Quote Originally Posted by steadysteve View Post
    It only holds 250 ml of coolant so that's why it's up and down all the time-- small volume doesn't take much heating/ cooling.
    Slow speed work sees mine creeping up to 95° before the fan cuts in and rapidly brings it down again.
    250ml doesn’t have much heat capacity so that makes complete sense

  4. #20
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    Quote Originally Posted by steadysteve View Post
    It only holds 250 ml of coolant so that's why it's up and down all the time-- small volume doesn't take much heating/ cooling.
    Slow speed work sees mine creeping up to 95° before the fan cuts in and rapidly brings it down again.
    Is that the 250ml figure is a spec from some official date sheet? It doesn’t seem very much when one considers that the bike has two,albeit small radiators and the pump and associated pipe work. It’s less than half a pint - there’s more than that, surely?
    Alan R

  5. #21
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    Quote Originally Posted by Engineer View Post
    I am sure BMW have done their homework.
    Very true. BMW do not make mistakes.

  6. #22
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    Quote Originally Posted by Alan R View Post
    Is that the 250ml figure is a spec from some official date sheet? It doesn’t seem very much when one considers that the bike has two,albeit small radiators and the pump and associated pipe work. It’s less than half a pint - there’s more than that, surely?
    Alan R
    I think it's from the Haynes manual. Not at home at the moment to confirm but it stuck in my mind because it got me wondering how much BMW would charge to change the fluid, as and when the accountants dictate it needs doing.

  7. #23
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    The header tank must be about that capacity. I must resist the temptation to drain my bike to find out!
    Alan R

  8. #24
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    Quote Originally Posted by FormbyGSA View Post
    Oh brilliant feel relieved thought I had bought a dud

    Sent from my ONEPLUS A5010 using Tapatalk
    Water / air cooled, less water in the system as heads main water cooled components - leads to fluctuating temperature, perfectly normal on these bikes

  9. #25
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    Haynes says 1.75 litres coolant incl reservoir

  10. #26
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    Quote Originally Posted by Carlosfandango View Post
    Haynes says 1.75 litres coolant incl reservoir
    That sounds more like it, 250 ml is about the volume of spray going through a puddle.

  11. #27
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    My previous lc bikes 2013 2015 temperature range stayed more constant than my current euro 4 16 , I questioned this at my local dealer and they looked into it agreed that it was up and down like a whores draws , but after comparing with other bikes at the dealership concluded that all was normal and don't worry ...so I don't now but at the time I did .

  12. #28
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    What does it matter that the temperature fluctuates, as long as the max and min are within the safe range?

  13. #29
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    Quote Originally Posted by MrMcNamara View Post
    Water / air cooled, less water in the system as heads main water cooled components - leads to fluctuating temperature, perfectly normal on these bikes
    But strangely, there are no coolant galleries in the heads...


  14. #30
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    Quote Originally Posted by Engineer View Post
    What does it matter that the temperature fluctuates, as long as the max and min are within the safe range?
    Are you sure you're an engineer?

  15. #31
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    Quote Originally Posted by ChazzyB View Post
    But strangely, there are no coolant galleries in the heads...


    doesnt that diagram show that there are ONLY coolant galleries in the heads?

  16. #32
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    You're right, when I zoom in, I can see galleries in the head around the exhaust valves. But the main gallery is around the top of the bore. I could swear I had read there were no galleries in the head. Prolly too much beer. ��

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