BMW K bikes (Bricks)

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Chocolate

Chocolate
Life time member
Life time member
Hello!

In The moment I'm doing some electric maintenance, under the tank and anything I can find.
I'm using electrical contact cleaner contact 60 (about the same like DeoxIT) and to finish dielectric grease.
We have some snow and I can't ride, so I have to do something with the bike :-)
Afterwards Sauna & therm

I'm not sure what this sensors are
Picture 1 this must be the water sensor!?
Sensor? | electric contact cleaning/maintenance Pics_010



Picture 2 is this the drain plug (number 2) and (number 1) the oil pressure sensor?!
For draining I normally unplug the water hose and not the drain plug.
Sensor? | electric contact cleaning/maintenance Dsc04814


If you have any tips what more/else to do, I'll be glad to hear you!


Thanks for your help
Cheers espresso


__________________________________________________
Only a few activities make me experience my senses in a way motorcycle riding does, it is like swimming in the nude in a river.
K75 BA/1992 ABS, K75 BA/1991 noABS, Ducati, Mobylette M1/1973
    

charlie99

charlie99
VIP
VIP
yes correct on both

note

you have a little oil at the bottom of the tell tale hole (from the oil- water pump )  you can see it on the leading edge of the sump

Sensor? | electric contact cleaning/maintenance Dsc04810


you have a leaking oil seal.....or just not cleaned up properly

keep an eye on it

you may have to replace the water and oil seals in the water pump housing in coming months of riding

have fun !!



Last edited by charlie99 on Sat Nov 28, 2015 11:19 am; edited 2 times in total


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OSensor? | electric contact cleaning/maintenance Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

robmack

robmack
Life time member
Life time member
There are two water temp sensors on a K-bike.  One sensor is in the stand pipe [the one depicted in your first photo] on the left front of the block and is used to feed the temperature relay and the ECU engine temperature information.  

The other water sensor is installed on the water/oil pump housing in the drain hole [depicted in your second photo] and is used to supply information for the optional water temperature gauge.  The single wire is fed through the pump housing, follows the hall sensor lead under the "T" plate and exits the block along with the hall sensor cable on the left front of the block.  This connector would attach to the harness for the additional instruments, if installed.  Part 4 in the diagram below:

Sensor? | electric contact cleaning/maintenance Diag_6dx


__________________________________________________
Robert
1987 K75 @k75retro.blogspot.ca
http://k75retro.blogspot.ca/
    

Chocolate

Chocolate
Life time member
Life time member
# Thanks Charlie, The picture isn't from me, 
but I still have drops coming out and reoaired the water-oil pump!
Sensor? | electric contact cleaning/maintenance <a href=Sensor? | electric contact cleaning/maintenance Image12" />

# thanks robmack, now I understand, helpful your explanation!

Cheers espresso


__________________________________________________
Only a few activities make me experience my senses in a way motorcycle riding does, it is like swimming in the nude in a river.
K75 BA/1992 ABS, K75 BA/1991 noABS, Ducati, Mobylette M1/1973
    

robmack

robmack
Life time member
Life time member
My explanation is flawed in one place, and I apologize. The electrical device in Photo 2 is the oil pressure switch as Charlie correctly pointed out. The optional water temp sensor would replace the coolant drain plug, if it was present.


__________________________________________________
Robert
1987 K75 @k75retro.blogspot.ca
http://k75retro.blogspot.ca/
    

Chocolate

Chocolate
Life time member
Life time member
@robmack wrote:… The optional water temp sensor would replace the coolant drain plug, if it was present.

Ah, that makes sense, I wondered, why there isn't a cable, it's optional :-)

Cheers


__________________________________________________
Only a few activities make me experience my senses in a way motorcycle riding does, it is like swimming in the nude in a river.
K75 BA/1992 ABS, K75 BA/1991 noABS, Ducati, Mobylette M1/1973
    

7Back to top Go down   Sensor? | electric contact cleaning/maintenance Empty Coolant Temperature Sensor Sun Mar 06, 2016 8:27 pm

redrockmania

redrockmania
Silver member
Silver member
Beware of the Coolant Temperature Sensor (See Chocolate's photo 1 above). I spent 2 months chasing a fault where engine started and ran well for about 5 minutes then shut off, not to restart until comparatively cool again. In my search for the problem I checked virtually all electrical and fuel injection system components and wiring. I fitted a new coolant temperature sensor incorrectly assuming that it was 100%. Turned out not to be so. I removed the "new" sensor and tested it and found that one of the two connector pins going to the wiring was giving me an 80X greater ohm reading than it should be. I tested the "old" sensor and got correct readings. I then cleaned the metal washer and face of the coolant temp sensor housing, refitted it and 👅 Problem solved. (Incidently, one pin connects to the EFI Computer and the other pin to the Temperature Sensing Switch/Relay that switches on and off the radiator fan. In future if I am fitting a new electrical component where possible I will test it before fitting. I don't want to spend several months off the road again...although learned heaps while chasing down the fault

    

Holister

Holister
Life time member
Life time member
Good result. We should see you at the Northern Tablelands Run in Nov then... just up the road from you.  Very Happy


__________________________________________________

1989 K100RT     VIN  0097367 (naked)  
1996 K1100RS   VIN  0451808
  Sensor? | electric contact cleaning/maintenance Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

charlie99

charlie99
VIP
VIP
@redrockmania wrote:Beware of the Coolant Temperature Sensor (See Chocolate's photo 1 above). I spent 2 months chasing a fault where engine started and ran well for about 5 minutes then shut off, not to restart until comparatively cool again. In my search for the problem I checked virtually all electrical and fuel injection system components and wiring. I fitted a new coolant temperature sensor incorrectly assuming that it was 100%. Turned out not to be so. I removed the "new" sensor and tested it and found that one of the two connector pins going to the wiring was giving me an 80X greater ohm reading than it should be. I tested the "old" sensor and got correct readings. I then cleaned the metal washer and face of the coolant temp sensor housing, refitted it and 👅 Problem solved. (Incidently, one pin connects to the EFI Computer and the other pin to the Temperature Sensing Switch/Relay that switches on and off the radiator fan. In future if I am fitting a new electrical component where possible I will test it before fitting. I don't want to spend several months off the road again...although learned heaps while chasing down the fault

yes indeed red ...been there myself

good win indeed


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OSensor? | electric contact cleaning/maintenance Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

ReneZ

ReneZ
Life time member
Life time member
Difficulty is also that the temp sensor grounds through the coolingwater stub on the block. If the sensor can't properly connect to 'ground' through it you can have issues as well.


__________________________________________________
Greetings from Florida! Having a 'new' K  :cyclops:    Surprised-o: 

Rene


BMW K100 - 1985 (0030029) Sensor? | electric contact cleaning/maintenance Rain
BMW K1200GT - 2003 (ZK01223)
    

Point-Seven-five

Point-Seven-five
Life time member
Life time member
@ReneZ wrote:Difficulty is also that the temp sensor grounds through the coolingwater stub on the block. If the sensor can't properly connect to 'ground' through it you can have issues as well.
I have been trying to figure out why my bikes are running so rich.  While I have the engine for my RT out I think it will  be a good idea to clean the mating surface between stub and block.  Might even add a grounding wire from the stub mount screw.  There is a lot of dirt and corrosion around there.  Easy jobs while the engine is out.


__________________________________________________
Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

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