BMW K bikes (Bricks)

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redrockmania

redrockmania
Silver member
Silver member
For those in Australia - SuperCheapAuto have in their Easter Sale Catalogue available from 29/3/17 - 14/4/17 a Black Ridge brand Infrared Thermometer able to measure from -50C to 380C The sale price is $34.95 (40% discount) - a saving of $25.02. This enables the safe and accurate testing of your Coolant Temperature Sensor at an affordable price.  I have no commercial affiliation with SuperCheapAuto.

    

nods

nods
Silver member
Silver member
Thanks mate.  What do you mean - do you take a temp reading at the tower that houses the temp sensor?


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Chassis number0025951
Vehicle code0504
SeriesK589
ModelK 100 RT 84 (0504 ( 0505 )
Body typeK 100 RT 84 (0504
Catalog modelECE
Production date1985 / 01
Engine0514)
Transmission
Steering
CatalyzerNONE
    

Holister

Holister
Life time member
Life time member
That looks like a good buy for an infrared laser thermometer. I bought a cheapie off ebay a while ago that seems to work ok but the build quality is pretty poor. I've used it to measure various engine parts as well as my big toe.
The lasers are powerful so be careful how you use it as they can damage your eyes.
Getting a reliably accurate reading off reflective metal surfaces is difficult so you need to find a suitable spot to take the reading. If your engine is painted black all the better.


__________________________________________________

1989 K100RT     VIN No.  0097367 (naked)  
1996 K1100RS   VIN No.  0451808
  Coolant Temperature Sensor testing - Measuring temperature during testing Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

redrockmania

redrockmania
Silver member
Silver member
Response to Nod's post: You can more easily and thoroughly test a Coolant Temperature Sensor (CTS) by removing it, suspend it with the base rod part of the sensor (brass usually) immersed in a saucepan of water, heating the water on a stove and taking temperature readings and at the same time taking ohm readings with your multimeter. This enables you to get a good idea of how your CTS is functioning at various temperatures and then make a decision to refit it or replace it. A scale of temperature to ohm readings is posted elsewhere in this and on other forums.

    

michaelvass

michaelvass
Silver member
Silver member
Where exactly would you aim the Infrared Thermometer to get an accurate indication of the coolant temp?

    

MartinW

MartinW
Life time member
Life time member



Last edited by MartinW on Sun Mar 24, 2019 4:30 pm; edited 2 times in total

    

Holister

Holister
Life time member
Life time member
@michaelvass wrote:Where exactly would you aim the Infrared Thermometer to get an accurate indication of the coolant temp?
Metal surfaces won't give you an accurate reading especially if they are really shiney. Probably best to aim it at the bottom of the left side of the radiator itself. Its black plastic. This is where the coolant enters the radiator from the crankcase and it will be at its hottest.

To accurately check the temp sensor you need to pull it out and place it in a controlled environment with hot water and a thermometer, then check the Ωvalue against the chart in the trouble shooting section off the Portal Tab.

Alternatively, just assume that when the engine has been sitting overnight, the coolant is around ambient temperature. After running for around 10 min and the fan kicks in it's at operating temp. Do a rough check on the temp graph at those points. Personally, I think this is all you need


__________________________________________________

1989 K100RT     VIN No.  0097367 (naked)  
1996 K1100RS   VIN No.  0451808
  Coolant Temperature Sensor testing - Measuring temperature during testing Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

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