Temp Gauge Range

[Rolla Newbie]

Hi all,

 

I am new to the world of FWD, having had KE70s for years. I have noticed that sometimes the temp gauge in my AE82 slowly creeps up to about 5/8. Seems normal, but I want to check before summer gets here.

 

How do I test that the thermo fan is working ok? Is there something I can short out, or measure to see if it is kicking in? I know the other fan is for the A/C, but am learning on this beasty.

 

Cheers

 

Paul

[Trev]

Hi all,

 

I am new to the world of FWD, having had KE70s for years. I have noticed that sometimes the temp gauge in my AE82 slowly creeps up to about 5/8. Seems normal, but I want to check before summer gets here.

 

How do I test that the thermo fan is working ok? Is there something I can short out, or measure to see if it is kicking in? I know the other fan is for the A/C, but am learning on this beasty.

 

Cheers

 

Paul

 

Unplug the thermo sensor that is located on the thermostat housing and the fan will (should) come on.

[Rolla Newbie]

Thanks Trev, will try that tonight.

 

Paul

[ke70dave]

also start the car up cold, and just let it idle.

 

it will go through its cooling system sequence.

 

ie.

 

engine start to heat up, guage goes up

 

engine heats up to operating temp, guage goes to opperating temp.

 

engine gets hotter, thermostat opens, guage drops slightly.

 

engine gets hotter, guage goes up further

 

thermo fan turns on

 

guage goes down back to operating temperature and the thermostat and cooling fan should regulate it to around the same temp. bit of fluctuation as the fan turns on/off thermostat opens/closed.

 

and if the thermo fan doesnt turn on, do what trev sais, if the thermo fan temp sender is stuffed, the fan will be turned on all the time, smart failsafe.

[Rolla Newbie]

Thanks guys, tried Trevs trick and hey work.

 

Will see how she goes in summer.

 

And yes it is good to see a smart failsafe for once.

[Julz01]

quick question would the cold start not work to well if the temp gauge sender isn't working, ive noticed that my temp gauge doesn't work and cold start will sit at about 2k

[Trev]

quick question would the cold start not work to well if the temp gauge sender isn't working, ive noticed that my temp gauge doesn't work and cold start will sit at about 2k

 

No, temp gauge sender is for the temp gauge only, the ecu gets it's readings from the sensors on the back of the head and a 2000rpm cold start is perfectly normal.

[Julz01]

ohh cool thought it read the same reading off the temp gauge sender