Quote:
Originally Posted by mt_goat
Biggest worry right now is the cooling system. The gauge is showing fine but the fan is running on high just cruising down the highway at 70 miles per hour on a 80 degree day. So I hooked up my laptop to the OBDII connector and monitored the coolant temp for about 15 miles. It is running around 185-195, and it is hottest at highway speeds.  This is with a 170 deg thermostat, and no air conditioning yet. Brian I'm not ready to say you're right, but I'm worried. Just how hot is too hot anyway? A stock Taurus thermostat doesn't even open until 198 deg. The trans temp is great, like around 160 deg |
Dude, you have to knock on wood after saying stuff like that!
I don't want to be right!
Anyway, I would mess around with the controller first; you have the DCC variable controller, right? What temperature do you have it set to right now? Try turning the temperature on the controller up 14 degrees (use one of the jumpers, as shown in the instructions) and go drive around. If the coolant temperature goes up 14 degrees as well, that COULD mean you have an undersized fan/radiator for your application... but if the temps change just a little, it could be that the fan is going like crazy aiming for a temperature it can't reach when fighting the opening/closing of the thermostat, so just ends up going full blast all of the time (in which case you might need to go to an even colder themostat). Do you have the linear indicator for the controller? Are you able to turn off the fan on the highway (some sort of manual switch) to see if that changes anything?
It's strange to me that it runs hottest on the highway, perhaps some sort of blockage, either on the radiator or in the lines? Running hotter on the highway tells me the radiator is undersized, because that's when you have the most air running though it...
Also: where is your controller sensor located? Is it nice and close to the coolant return to the engine? When putting mine in, I basically warmed up my engine, felt for the coldest spot on the radiator I could find (right next to the coolant return, bottom-left side of the radiator if you're looking at it from the back.
We'll make this cooling system work yet...
