RX3 Cooling System

[katflap]

Originally Posted by pyoungbl

Man, you can clearly see that the thermostat is opening ...shooting a slug of cold water into the engine...then closing to heat the water...and opening again. In my mind it is much better to reach a stable temp and stay there, like you have with the bypass fitted.

yeah, I does seem to be the case. But I don't understand why the thermostat is opening at such a low temperature.

I will look further into the logs and get back to you with probably some "half baked" theories as to why this is happening

[Jay In Milpitas]

Originally Posted by katflap

yeah, I does seem to be the case. But I don't understand why the thermostat is opening at such a low temperature.

I will look further into the logs and get back to you with probably some "half baked" theories as to why this is happening

If you are taking the temp from the stock sensor, it's at the "out" end of the first radiator, so it's already been cooled some.

[katflap]

Originally Posted by Jay In Milpitas

If you are taking the temp from the stock sensor, it's at the "out" end of the first radiator, so it's already been cooled some.

Jay, that sensor looks the part but its just a thermo-switch for the fans.

My temp readings come from the PCHUD diagnostic software which uses the temp sensor with the blue connector, mounted on the thermostat housing. I also have an after market temp gauge with a sensor positioned just before the thermostat housing.

[katflap]

Ever wondered how much water flows through the thermostat air bleed hole when the thermostat is shut ? , NO, why not ?

Half baked theory # 1

It took just 2 mins to pump through 1 Litre of water, that's the total coolant capacity of the RX3.

And this pump is tiny , it used to be part of a miniature solar fountain. Probably operates at less than 1000rpm.

No match to the bikes pump in size and running at 1500rpm plus.

So my theory is that this amount of coolant flow , and its probably more, is enough to keep the system cool, below the thermostat opening temp.

( standard RX3, 70c stat used ).

[Jay In Milpitas]

Originally Posted by katflap

Jay, that sensor looks the part but its just a thermo-switch for the fans.

My temp readings come from the PCHUD diagnostic software which uses the temp sensor with the blue connector, mounted on the thermostat housing. I also have an after market temp gauge with a sensor positioned just before the thermostat housing.

Damn, I knew that. This is what happens when I try to mechanical and it's way past my bed time.

[BlackBike]

Kat...Mad, mad, I tell you. British tinkering.

Well done sir, now put the kettle.

[katflap]

Originally Posted by BlackBike

Kat...Mad, mad, I tell you. British tinkering.

Well done sir, now put the kettle.

Yeah, I worry my self sometimes