BMW K bikes (Bricks)

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1Back to top Go down   pump done new problem  Empty pump done new problem on Sat Apr 25, 2020 9:05 am

dakelvinator

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Hi again,
             I have fitted new seals to the pump using motoworks prototype tool (more on that later!). I refitted the pump using 3 bond and refilled the rad with coolant (slowly and squeezing pipes to help remove air). Filled the the reservoir to max. Now the temp gauge is very jumpy and the fan kicks in just after the blue marks which is a lot earlier the it use to?. I have run the bike at idle it and from cold it takes about 15mins then the fan kicks in (as above on the gauge). I don`t appear to have any leeks (left over night) I have pressure in the rad pipes. Has anyone had this? could it be a sticky thermostat? (it did sit about 2 weeks with any fluids in it) could the gauge be faulty? or do I still have air in the system?
I ran the bike without the rad cap on and as the coolant rose I put the cap back on, Their was a slight change in the level on the reservoir? 
Any suggestions? thanks in advance K.

    

2Back to top Go down   pump done new problem  Empty Re: pump done new problem on Sat Apr 25, 2020 11:38 am

dakelvinator

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Update, I think the temp sensor is dead! the temp gauge really started to play up then then was unresponsive. I earthed the gauge and it responded (going to max hot position). K.

    

3Back to top Go down   pump done new problem  Empty Re: pump done new problem on Sat Apr 25, 2020 4:29 pm

Dai

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@dakelvinator wrote:I don`t appear to have any leeks (left over night)
Nor do I. We ate them all.


__________________________________________________
1983 K100 upgraded to K100RS spec, 1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

4Back to top Go down   pump done new problem  Empty Re: pump done new problem on Sat Apr 25, 2020 4:45 pm

brickrider2

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pump done new problem  44271


__________________________________________________
1996 K1100LT
    

5Back to top Go down   pump done new problem  Empty Re: pump done new problem on Sat Apr 25, 2020 5:55 pm

92KK 84WW Olaf

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How did you drain the system to start with?


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 37,190 miles
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles.
    

6Back to top Go down   pump done new problem  Empty Re: pump done new problem on Sun Apr 26, 2020 5:44 am

Stumpy

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I would suspect that you have an airlock, release pressure and run the engine without the cap until it warms up. Watch out for the spray as the coolant goes everywhere.


__________________________________________________
BMW K100RT 0095857
    

7Back to top Go down   pump done new problem  Empty Re: pump done new problem on Sun Apr 26, 2020 6:17 am

dakelvinator

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@92KK 84WW Olaf wrote:How did you drain the system to start with?
Hi Olaf 
         I just undid the hose pipe so I wonder if when I was cleaning the pump and fitting the seals i damaged the sensor? or may be it had just run its course? do you know if this sensor on the pump only controls the gauge or does it act as a fan switch? (I know there`s a temp sensor on the block just under the rad is this the fan switch?). K.

    

8Back to top Go down   pump done new problem  Empty Re: pump done new problem on Sun Apr 26, 2020 6:18 am

Dai

Dai
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As Stumpy says. They can get airlocked at the bottom of the radiator if you fill it quickly. Fill slowly and squeeze both the filler pipe and the big fat pipe on the left side. Yuo'd be surprised how much air that drives out.

The pump sensor drives the temperature gauge - nothing else. The temperature sensor under the radiator drives the fan and tells the ECU when to not allow the bike to start.


__________________________________________________
1983 K100 upgraded to K100RS spec, 1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

9Back to top Go down   pump done new problem  Empty Re: pump done new problem on Sun Apr 26, 2020 6:29 am

dakelvinator

dakelvinator
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@Dai wrote:As Stumpy says. They can get airlocked at the bottom of the radiator if you fill it quickly. Fill slowly and squeeze both the filler pipe and the big fat pipe on the left side. Yuo'd be surprised how much air that drives out.

The pump sensor drives the temperature gauge - nothing else. The temperature sensor under the radiator drives the fan and tells the ECU when to not allow the bike to start.
Thanks for confirming about the sensor Dai, I have ordered a new sensor so I will drain the system to fit that and try again, I wont need to use the bike anyway so I don`t need to risk causing any damage just in case their is an air lock. Hopefully it will stay "leak/leek" free Razz. K.

    

10Back to top Go down   pump done new problem  Empty Re: pump done new problem on Thu Apr 30, 2020 12:20 pm

dakelvinator

dakelvinator
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Got new temp sensor all good so far! cheers (just on idle need to give it a good drive), the one I removed from my pump had a blue collar this must have been off a k100? the new one has a black collar. whats interesting is my temp gauge would be on the second bar when the fan kicked in and now the fan kicks in on just before the half way mark. Am I right in thinking the the blue collar sensor and the black collar sensor have different temperature ranges? hence why their is one for the k100 and a different one for the k1100.  K.

    

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