Water Temp sensor question.. - Kawasaki KLR 650 Forum
1987 to 2007 Wrenching & Mods For maintaining, repair or modifications of Generation 1 KLR's. 2007 and earlier.

 
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post #1 of 3 Old 10-05-2016, 08:42 PM Thread Starter
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Water Temp sensor question..

Hey guys, been going through the KLR. I noticed, the water temp sensor looked slanted, like it was bent, the one up by the spark plug. Didn't seem right, went to unscrew it and "snap" broke off as you can see in the pics. Now, is this only for the sensor gauge? Does this sensor do anything vital other than tell you what temp you are at? I am installed a TrailTech Vapor gauge with the T barb fitting sensor. IF this is not needed I will close the hole up. I can see on the wiring diagram, it is just the yellow wire that goes to the instrument cluster. The Red/White wire is the fan switch, which is what all I am really worried about. Thanks guys. So far you all have been great!
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post #2 of 3 Old 10-05-2016, 09:02 PM
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To the best of my knowledge and belief, the water temperature sensor resistance varies with the coolant temperature near the cylinder head, thus "reporting" that parameter only.

The thermostat and the thermal fan switch "do their things" independently.

So, an alternative coolant temperature instrument should supersede the OEM temperature sensor, IMHO. After all, engines with merely, "idiot lights," do not allow incremental coolant temperature tracking.
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post #3 of 3 Old 10-05-2016, 10:43 PM Thread Starter
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Quote:
Originally Posted by Damocles View Post
To the best of my knowledge and belief, the water temperature sensor resistance varies with the coolant temperature near the cylinder head, thus "reporting" that parameter only.

The thermostat and the thermal fan switch "do their things" independently.

So, an alternative coolant temperature instrument should supersede the OEM temperature sensor, IMHO. After all, engines with merely, "idiot lights," do not allow incremental coolant temperature tracking.
Ok, very cool. Look like I'll be caping it off Thanks for the quick response. Super stoked on getting this Vapor gauge put together.
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