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beemeerr11
Flying Brick Rider
Joined: 05 Mar 2006
Posts: 168
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 Posted: Tue Jun 22, 2010 2:21 am Post subject: How do you test the Temp Sender Unit |
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My Bike has been running what appears to be hotter that usual, recently had the bike resprayed, while apart, I flushed the radiator heaps all flowed well also checked the pump, all O.K.
Put the bike back together and it still seems to run hot? I have since purchased a 98K11LT cheap so I have a complete bike for spares.
Just wondering if there was a way to test the sender unit (the one below the water pump) as pulling the unit out means loosing coolant?
Lou
95LT |
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Rafal
Flying Brick Rider
Joined: 05 Jan 2009
Posts: 257
Location: Wroclaw, Poland
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| Posted: Tue Jun 22, 2010 3:24 am Post subject: |
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Hello!
This little sender on pump housing is only for temp gauge. The temp. sensor for ECU is below the radiator. I don't know characteristics of small sensor, for the engine: plot
Best regards,
_________________
Rafal
K1100RS is a real beast (in Marrakesh Red)
K75S is a real beauty - she has gone  , but not to far  .
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beemeerr11
Flying Brick Rider
Joined: 05 Mar 2006
Posts: 168
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| Posted: Tue Jun 22, 2010 8:22 pm Post subject: |
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| Rafal wrote: | Hello!
This little sender on pump housing is only for temp gauge. The temp. sensor for ECU is below the radiator. I don't know characteristics of small sensor, for the engine: plot
Best regards, |
Thanks for that info rafal, but it is the small sensor that is below the water pump that I need to know about?
Lou
95LT |
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Rafal
Flying Brick Rider
Joined: 05 Jan 2009
Posts: 257
Location: Wroclaw, Poland
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| Posted: Wed Jun 23, 2010 1:42 am Post subject: |
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Hello!
The sensor on the cooling pump is only for temperature gauge. It is NTC thermistor, the resistance of the sensor drops, as temperature rises. Usually there is nothing to brake over there, usually the faulty part is connector or wire. Quick check is to take the wire off the sensor - gauge should drop to zero, the short cut it to ground - (i.e. engine housing) and the gauge should go to maximum.
When does the radiator fan kicks in - what is the temp. gauge position?
In Tech. resources there are informations about ECU error codes readout, try to do it and check if there is no error from ECU temp. sensor and you can perform fan test.
Best regards,
_________________
Rafal
K1100RS is a real beast (in Marrakesh Red)
K75S is a real beauty - she has gone , but not to far .
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RJTrucker
Flying Brick Rider
Joined: 31 Mar 2008
Posts: 234
Location: Central NJ
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| Posted: Wed Jun 23, 2010 10:52 pm Post subject: temp sensor |
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would a bad temp sensor cause the bike to not start when hot? I have a K100 that starts great cold but once it gets hot ( and that bike really gets hot) it willnot start till it cools down for a while. Already changed the coils, hall effect, fuel pressure regulator and wired. Still same problem. I have a temp sensor that I have tested and know is good but would that make it not start?
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Ron
1993 K11LT
1985 K100RS with over 100K on it
1985 K100RS Luftmiester Turbo Work in progress (any help is appreciated)
1974 R90/6 |
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abreeze
Flying Brick Rider
Joined: 17 Jun 2006
Posts: 671
Location: atlanta
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| Posted: Fri Jun 25, 2010 9:59 pm Post subject: |
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| Quote: | | I have a K100 that starts great cold but once it gets hot ( and that bike really gets hot) it willnot start till it cools down for a while. |
the Engine Temp Sensor located behind the radiator is a dual output unit.
One controlls the motronic(air/fuel mixture) and the othe the temperature switch(fan/temp light). the nominal(70 deg F) value across each is 2.1K Ohms. As they heat up the Resistence decreases.
if your temp sensor is ok, you might have vapor lock. early k bikes gas tanks can get very hot and cause vapor lock.
if you want to check the engine temp, use a laser temp guage and check multiple areas. |
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Rafal
Flying Brick Rider
Joined: 05 Jan 2009
Posts: 257
Location: Wroclaw, Poland
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| Posted: Sun Jun 27, 2010 6:38 pm Post subject: |
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| abreeze wrote: |
the Engine Temp Sensor located behind the radiator is a dual output unit.
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What kind of bull..it are you talking about? Have you seen K1100 (Matronic 2.1 or 2.2) wiring schematic?
http://k-technik.pytalhost.com/pdf/schaltplanma2.1ohnekatweb.pdf
| Quote: |
if you want to check the engine temp, use a laser temp guage and check multiple areas. |
Did You mean Pyrometer? That's good idea. But the pyrometer has so much common with lasers as laser target pointer with deathly browning 0.50 bullet  .
Best regards,
_________________
Rafal
K1100RS is a real beast (in Marrakesh Red)
K75S is a real beauty - she has gone , but not to far .
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abreeze
Flying Brick Rider
Joined: 17 Jun 2006
Posts: 671
Location: atlanta
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| Posted: Sun Jun 27, 2010 11:08 pm Post subject: |
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| Quote: | | One controlls the motronic |
One controlls the jetronic...there fixed....
| Quote: | | What kind of bull..it are you talking about? Have you seen K1100 (Matronic 2.1 or 2.2) wiring schematic? |
| Quote: | Quote:
I have a K100 that starts great cold but once it gets hot ( and that bike really gets hot) it willnot start till it cools down for a while. |
Well not in a while, but have you seen one from a K100? It didnt resemble a turd.
http://www.bmwons.ca/K100/download/k100-Electrical.pdf
| Quote: | | But the pyrometer has so much common with lasers as laser target pointer with deathly browning 0.50 bullet . |
Did you mean the deadly 50 Caliber BMG Cartridge? A .50 cal bullet without a case, powder and primer is as useless as a pryometer without a laser to know where to point it.
phont-ma-dee!! |
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Rafal
Flying Brick Rider
Joined: 05 Jan 2009
Posts: 257
Location: Wroclaw, Poland
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| Posted: Mon Jun 28, 2010 2:58 am Post subject: |
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| abreeze wrote: | | Quote: | | One controlls the motronic |
One controlls the jetronic...there fixed....
| Quote: | | What kind of bull..it are you talking about? Have you seen K1100 (Matronic 2.1 or 2.2) wiring schematic? |
| Quote: | Quote:
I have a K100 that starts great cold but once it gets hot ( and that bike really gets hot) it willnot start till it cools down for a while. |
Well not in a while, but have you seen one from a K100? It didnt resemble a turd.
http://www.bmwons.ca/K100/download/k100-Electrical.pdf
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Mea culpa, head down  . BTW great wiring schema - very clear. I'll be more humble in the future.
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| Quote: | | But the pyrometer has so much common with lasers as laser target pointer with deathly browning 0.50 bullet . |
Did you mean the deadly 50 Caliber BMG Cartridge? A .50 cal bullet without a case, powder and primer is as useless as a pryometer without a laser to know where to point it.
phont-ma-dee!! |
Exactly, that's my point .
Best regards, and sorry for incontinence.
_________________
Rafal
K1100RS is a real beast (in Marrakesh Red)
K75S is a real beauty - she has gone , but not to far .
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robleyd
Flying Brick Rider
Joined: 23 Jul 2009
Posts: 398
Location: Murbko, Australia
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| Posted: Mon Jun 28, 2010 4:04 am Post subject: |
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| Quote: | | Best regards, and sorry for incontinence. |
I guess you need some of these, then http://www.TENA.com.au/Men 
Sorry, I understand that English is probably not your first language, but I just couldn't resist that!
/me taking the piss again...
_________________
David, owner of:
1996 K1100 LT |
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Rafal
Flying Brick Rider
Joined: 05 Jan 2009
Posts: 257
Location: Wroclaw, Poland
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| Posted: Mon Jun 28, 2010 4:21 am Post subject: |
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Well, shit! it suppose to be inconvenience - T and V are not close to each other on the keyboard at all . Bloody spelling helper in Firefox .
I love language jokes, so please don't resist  . BTW, how did you found that page ? hmm ?
Best regards,
_________________
Rafal
K1100RS is a real beast (in Marrakesh Red)
K75S is a real beauty - she has gone , but not to far .
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hfxrzw
Mad Brick Rider
Joined: 30 Jan 2009
Posts: 78
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| Posted: Mon Jun 28, 2010 7:54 am Post subject: |
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Rafal, you know where sympathy is in the dictionary, don't you? Between shit and syphilis.
_________________
Cheers, Rene
Greetings from Florida.
BMW K100 '85 |
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robleyd
Flying Brick Rider
Joined: 23 Jul 2009
Posts: 398
Location: Murbko, Australia
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| Posted: Mon Jun 28, 2010 8:27 am Post subject: |
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| Quote: | | BTW, how did you found that page ? |
I googled for "male incontinence pads" 
And no, I'm not yet at the age where I need the products of that website. Yet.
_________________
David, owner of:
1996 K1100 LT |
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Tim (Midland Section)
Flying Brick Rider
Joined: 08 Apr 2005
Posts: 960
Location: Pinxton, Nottingham, England.
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| Posted: Mon Jun 28, 2010 7:02 pm Post subject: |
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| robleyd wrote: |
I googled for "male incontinence pads"
And no, I'm not yet at the age where I need the products of that website. Yet. |
Not with that much piss taking, you won't.
Great repartee gents BTW.
_________________
Regards Tim,
Grey haired riders don't get that way by pure luck
1996 Guzzi Cali3 LAPD
1972 750 Commando
G6HRN
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