The Honda PCX / Forza / ADV150 / SH Forums

Hi,

Did anyone install a coolant temperature indicator?

I'd like to have one apart from the overheating lamp. Just to know if the temperature is too low or normal.

Oh, and a question: does PCX 125 have a thermostat ?

The new 2015 PCX has a coolant temperature indicator on the circuit diagram, but I can't say I even thought of that until you mentioned it, nor do I know if the UK 125 model has it - probably - someone will check their dash and advise

Check it out here:
http://youtu.be/rSfdcT3SdjI

I've got plenty more vids if you have a look where you can see it...
Yes, Pcx has a thermostat and this little unit is a direct plug in loop loom..it's Koso temp meter.

iceman, by indicator I mean a thermometer showing the temperature of the coolant liquid. Not just an overheating warning lamp.
It would be nice to connect to existing temp sensor if it's somehow linear not only binary or to put another probe somewhere in the cooling system. Or perhaps replace original sensor with a more sophisticated one.

Pcxdemon wrote:Yes, Pcx has a thermostat and this little unit is a direct plug in loop loom..it's Koso temp meter.

Do you have perhaps a Koso part number?
I could buy something like this:
http://shop.mieloch.pl/obrotomierz-koso ... 3364.bhtml
or
http://shop.mieloch.pl/termometr-koso-s ... 0092.bhtml

Not much choice in Poland...

Think the system uses the temperature as one of the conditions for the stop/start system to work.

Yes. I forgot.
So it should be possible to connect additional gauge to show temperature using value from the original temp sensor.
Hmm...

wojtek_pl wrote:Hi,

Did anyone install a coolant temperature indicator?

I'd like to have one apart from the overheating lamp. Just to know if the temperature is too low or normal.

Oh, and a question: does PCX 125 have a thermostat ?

It's probably too low or normal unless the "overheating lamp" comes on? Wouln't that do?

Pcxdemon wrote:http://japan.webike.net/products/21551774.html

Perfect.

Pcxdemon wrote:http://japan.webike.net/products/21551774.html

Thank You. Is it hard to mount? And I wonder if it will fit to 2014 model...

wojtek_pl wrote:

Pcxdemon wrote:http://japan.webike.net/products/21551774.html

Thank You. Is it hard to mount? And I wonder if it will fit to 2014 model...

No,its very easy. Need to connect power wires to key ON wiring underneath the screen and just plug in the loop harness provided in to the thermostat..Its actually made for 2012+ models as the plugs were different for V1 Pcx.I had to cut,splice and soldier the wiring to work it on mine...that was easy as well.

Besides eventually showing a coolant temp reading, will you know when bad is bad or just perhaps see it rise suddenly - has anyone ever had a coolant over-heat / failed sensor/alarm?

iceman wrote:Besides eventually showing a coolant temp reading, will you know when bad is bad or just perhaps see it rise suddenly - has anyone ever had a coolant over-heat / failed sensor/alarm?

Not me

iceman wrote:Besides eventually showing a coolant temp reading, will you know when bad is bad or just perhaps see it rise suddenly - has anyone ever had a coolant over-heat / failed sensor/alarm?

Normal operating temp sits between 80-90c degrees. If it goes above 95c and it's not coming down id be getting worried... Stock motor should never have any drama but on highly modded engines it's a valuable instrument. You can prevent overheating and warping the head although you can get a new head replacement for $100 shipped from Partzilla or reshave the old one for that money, so no big deal either way..

Pcxdemon wrote:

iceman wrote:Besides eventually showing a coolant temp reading, will you know when bad is bad or just perhaps see it rise suddenly - has anyone ever had a coolant over-heat / failed sensor/alarm?

Normal operating temp sits between 80-90c degrees. If it goes above 95c and it's not coming down id be getting worried... Stock motor should never have any drama but on highly modded engines it's a valuable instrument. You can prevent overheating and warping the head although you can get a new head replacement for $100 shipped from Partzilla or reshave the old one for that money, so no big deal either way..

Even with a mod, has anyone ever had such an experience on a PCX? Unlike 1000cc monsters or V6 car engines, the PCX with mod only has a tiny increase in power or acceleration (even with modified ECU management chips). As long as the scoot is maintained by someone, and coolant checked and replaced, it does not seem like a coolant temp issue will arise on a PCX.

I'm worried that in this weather outside it may be too cool to work efficiently...

iceman wrote:

Pcxdemon wrote:

iceman wrote:Besides eventually showing a coolant temp reading, will you know when bad is bad or just perhaps see it rise suddenly - has anyone ever had a coolant over-heat / failed sensor/alarm?

Normal operating temp sits between 80-90c degrees. If it goes above 95c and it's not coming down id be getting worried... Stock motor should never have any drama but on highly modded engines it's a valuable instrument. You can prevent overheating and warping the head although you can get a new head replacement for $100 shipped from Partzilla or reshave the old one for that money, so no big deal either way..

Even with a mod, has anyone ever had such an experience on a PCX? Unlike 1000cc monsters or V6 car engines, the PCX with mod only has a tiny increase in power or acceleration (even with modified ECU management chips). As long as the scoot is maintained by someone, and coolant checked and replaced, it does not seem like a coolant temp issue will arise on a PCX.

Stock Pcx no worries....modded Pcx with 17rwhp only a fool wouldnt worry...

OK, So I got my thermometer installed (the kit from webike.net). It shows something. Like 116C as the standard riding temperature. It is possible that 2014 temp sensor is different than previous models hence I have such high reading. I don't think this is real working temperature (though, it could be as it's not pure water and presumably works under pressure so boiling point is higher that 100C anyway). Though as I remember some specs of Prestone cooling liquid it's boiling temperature is 137C.
Anyway I have consistent indication 115,9 to 116,5 while riding and somehow like 117,5 while standing still (outside temp around 8C).

Not sure if that's too hot or not. It is for a car system anyway. Have you tried putting the sensor in boiling water to check its accuracy? Mind water boils at a different temperature depending on what altitude your at. You can't get a decent cup of tea at the top of Everest. The boiling point of water is about 80*C at that hight. That's why there's no cafes up there.

I just noticed that when engine is warm enough for Start-Stop system to engage, the thermometer shows 80C. Since Start-Stop should activate when the temp is 50C that means I have to subtract 30C from the readings to have real temperature.
116C minus 30C gives 86 Celsius, which is a legitimate working temperature.
Anyway it's not the temperature itself that is important, it's the change. If it suddenly goes up or down significantly, that means something suspicious is going on and requires inspection.