Coolant Fan Speed Temps

[nghtshd88]

Does anyone know at what temperature the radiator fan is suppose to kick into high speed? I reached 227F and still did not hear it kick it. Can barely even tell its running on low speed. I suppose its quiet to begin with? Its been 2yrs since Ive had an LS so I forget. If it is suppose to kick in by then how can I troubleshoot or what are typical causes on the non hydraulic?

05 v8 with 48k miles, have to replace my coolant still and the pipes as I just got a crack in one but I have no air in the system and full coolant right levels now.

 

[joegr]

I think (but do not know for certain) that it should be at max by 230.
If you start it with the AC off, then turn the AC on (if the AC is working), the fan should come up to at least medium speed pretty quickly.
The fan is very quiet with the AC off, even with it in the 90s outside, but who would have the AC off in the 90s?

If you have a cracked cooling system part, then you must replace it. Are you saying that you had just (last few months) replaced that part and the rest of the plastic parts (all of them)?
Running hot will not cause good plastic parts to crack. The degas cap will vent pressure (and coolant) before that could happen.

 

[nghtshd88]

So there is a low medium and high speed? I turned tge A/C on and it creeped up to a higher speed. Still VERY quiet compared to other cars IMO.

Was reading this thread which led me to believe it was starting to overheat since I did not hear my fan kick on at all over 225. The interior guage although has never gone above normal reading. Not sure what it takes to move it higher. I also took off the radiator cover on top and cleaned all the leaves out of condensor and radiator.

http://www.lincolnvscadillac.com/fo...at-is-the-runing-temp-of-a-06-lincoln-ls-3-9l

I have not yet replaced the pipes. I have to very soon it looks. Just spent 450 on coils/plugs and still need front struts to fix the highway vibration. Was hoping to get away with a coolant change before the winter.

 

[joegr]

So there is a low medium and high speed? ...

Not really. It is continuously variable. It only runs as hard as it needs to. (While it theoretically has an infinite number of speeds, as a practical matter, it is more like 15 or so speeds.)

 

[FDR]

The interior guage although has never gone above normal reading. Not sure what it takes to move it higher.

I doubt it'd be different, but Gen 1 puts the gauge exactly in the middle from 190-240

 

[nghtshd88]

Well in that case I suppose Ill let it hit 230 and see it if changes speed. The A/C triggered it higher at cold but at 227 it was on low it seemed. Hell with the A/C on its hard to know its on since its quiet. With no exact temp of when it should kick up and being continuously variable how can you actually know then fan motor is not performing as it should?

 

[joegr]

So far, it seems that the electric fan either works or it doesn't. I haven't heard of any just being weak.
You know that the speed control signal from the PCM is working because the fan has failsafe protection. It goes to maximum speed if the signal from the PCM is missing or invalid.

Are you monitoring this temperature at idle or while driving. Above a certain speed (not all that fast either), the fan is turned off completely.

 

[nghtshd88]

I am monitoring while idling.

 

[BrianDye]

I noticed these fans are super quiet as well. I was trying to hear if mine was on full speed, had the car running in my garage with the AC on and barely heard it. 99% of other cars electric fans sound like a semi fan including my girlfriends Fusion. You hear the fan over everything, by far.

 

[joegr]

I noticed these fans are super quiet as well. I was trying to hear if mine was on full speed, had the car running in my garage with the AC on and barely heard it. 99% of other cars electric fans sound like a semi fan including my girlfriends Fusion. You hear the fan over everything, by far.

That's because many other cars have one or two speed fans.

 

[don-ohio]

Don't forget in this time of year the bugs are filling up the condenser fins and the radiator fins get debris too. I always let my car cool off all the way, and then flush water from a pistol grip nozzle back thru the fins,taking care not to hit the alternator with water.
You can spray thru the other way too.
You'll be amazed in most cases how many bugs and the how much filth comes out of those fins.This makes it easier for the cooling system to be efficient.
Some people blow air thru them. I have just always used a water hose. don-ohio ^)

 

[FDR]

Maybe I'm too pessimistic, but I felt like there was no real progress made by spraying my radiator(s). From the front, all you can do is hope to push stuff through the AC condenser. but there was no point spraying from the back or top because you have to get through the radiator, I think the trans cooler, and then the condenser, at which point there was no appreciable water stream. I even had the bumper off while doing this.

Maybe I just don't have enough bugs to notice them coming out.

 

[don-ohio]

It takes `sticktoitiveness' to do it. I could barely get a pistol grip nozzle in there past the fan blades,BUT I did it. Then I sprayed back thru the condenser. A lot of bugs and junk washed out, but as I was underneath another car the other day(a Mustang), I thought it looked like it might be easier to do this flush from underneath the car. I'll try it next time the LS is on the lift.
don-ohio ^)

 

[1LoudLS]

I was trying to hear if mine was on full speed

if it was on high speed, you wouldn't need to try hard, it sounds like a jet taking off