Hey guys,

Just curious if anyone's read or has had the same experience with this. The cooling fans on my 2001 Turbo stay on for what seems to be a significantly long period of time, about 10 minutes after the vehicle is **** down. And cycles on/off again another 10 minutes later. I do not drive my car hard before I park it and generally let it cool down by doing some easy cruising the last 10-15 minutes. The car is a weekend Sunday driver and never sees track conditions. Typical New England Summer weather mid-70's to 80's.

Is there anything that can be done to upgrade the cooling fans or cooling system? Car has 38k miles. Typically driven about 4-5k a year. I just got the car last summer and doubt the previous owner changed the coolant.

Thanks,

 

fan sensor by the p/s pump. fan runs based on ecu demands . its all normal. let it run

 

32krazy!,

Do you think the life expectancy of the coolant could be an issue here as well, considering the age of the coolant system? I get the fan cycles on and off based on demand. But at what point does demand seem excessive? Has this been measured?

 

unlikely anybody has timed it. if the coolant is replaced on schedule then that shouldnt be any issue

 

At what mileage and age should the coolant be flushed according to Porsche's recommended interval?

Edit: also for what it's worth I've had Tstat sensors go bad on my 2002 VW 1.8T reading higher temperatures. Not saying this is the issue but one would imagine that there should be an interval to replace these as well on the 911. VW says to replace these every 40k while doing the timing belt and water pump.

 

the sensor reads engine bay heat and runs the fan accordingly. its not internal engine based

 

The sensor element itself could go out of calibration based on heat cycles and age. I guess I'm just debating on whether or not it's worth my time to change the coolant at this age and what other system accessories should be swapped with new in the process to restore performance? History of the previous ownership is questionable...

 

If your 2001 TT has never had flush / replaced with new coolant. I would strongly suggest you have it done at a facility thatcan pressure flush the coolant.
My 2003 TT has very little miles on it and my high school buddy that's a Master Porsche Tech , changed it out for me at the Porsche dealer he works at.
To my knowledge, onr function of the coolant is to lubricate the water pumps bearings/ seals. It's proactive vs reactive when your car goes down and possibly have to tow it in.
Nothing last forever..my .02 cents.

 

Reads about normal.

That easy cruising is not sufficient to allow the engine to cool down.

Even easy cruising the engine's being asked to make 40hp or more and that's going to keep the exhaust -- including the turbos -- pretty darn warm.

The manual recommends a 2 minute idle time before shut down. At idle the engine's making the least amount of heat it can make and still run. This gives the turbos time to shed the considerable heat load they can have.

If it is not already present you can install a fuse in the 2nd fuse location of the engine compartment fan. This causes the fan to run all the time the engine is on.

This is the only "upgrade" I would consider.

This tends to keep the engine compartment heat down while the engine is running and while the fan will come on again after the engine is shut off based on my unscientific observation the fan doesn't run very long nor does it cycle that often. Depends though upon the ambient temperature. Last week it was in the high 90's/100's and that's hot.

Oh, if you park your car in the garage you can buy a small floor fan and aim it at the front of the car but aimed low to blow air under the car. I did this with my Boxster when I parked it in a garage and this helped to remove heat from the engine compartment and keep the cabin from heat soaking from the engine heat and from being inside the closed garage.