Temp Controlled Oil Cooler Fan?

SeaDweller · 07-01-2002, 12:25 PM

I'm going to add a fan to my aftermarket cooler to see if I can reduce the engine temps in this Florida summer heat. JC Whitney (no wisecracks) has a temperature switch that can be used to control the fan, which looks fairly straightforward.

Unfortunately, I'm a dunce when it comes to wiring, so is there anywhere I can get a "morons guide to wiring a fan switch" guide to install this thing? Perhaps some pointers, geared towards a 6 year old, would suffice.

Thanks!!!

Bill Verburg · Bill Verburg's Garage

As long as you realize that the fan is only an aid for the periods of time that the car is stopped or moving very slowly, it may help. There is No substitute for copious volumes of air flowing through an oil cooler. The fender well, unfortunately, is a relatively poor area for air flow, so open up the hole in the bumper, try to duct to the cooler, try a scoop from below the cooler and try to seal the sides of the cooler so that what air does go through the wheel well also goes through the cooler.

kepperly · kepperly's Garage

dear sir,
try going to ebay and look at the fans i,ve been selling to several fellow Porsche owners. no complaints yet and very easy to install.
go to porsche parts on ebay and do a search for oil cooler fans .
keith

pbs911 · pbs911's Garage

Here is a link to the fan I picked up a few weeks ago, $12.00, recommended by Early_S_Man. Installed it and it works very well.

Electric fan for Carrera Oil Cooler

Data from manufacturer

SeaDweller · 07-01-2002, 02:43 PM

Cool (pun intended), thanks for the links!

On the manu. page, I didn't see anything that would indicate this is an "all weather" fan. Did you receive yours yet? Does it look like it could handle getting wet?

Thanks!!

john walker's workshop · 03:02 PM

www.the-fan-man.com click fans, and look for the small "spal" fan. the 6.5" unit would be good.
get a small 30A bosch or hella relay with 4 or 5 terminals, the 30 term gets 12V at all times. the 87 term goes to the fan. the 86 term gets 12V with the key on, and the 85 term goes to the temp switch, which grounds the wire at whatever temp it trips at. if the temp switch has 2 terminals, ground the other one. if it has only one, make sure the metal body of the cooler is grounded. on a 5 terminal relay you ignore the 87A term.

GIBSON · GIBSON's Garage

This thread reminds me of one the other day where someone was asking about the factory oil cooler fan not working. The factory manual says it comes on at 242 degrees, that's probably why many people think the fan is not working. Obviously, Porsche is not as concerned about oil temps as some of us are.

pbs911 · pbs911's Garage

Quote:

Originally posted by SeaDweller
Cool (pun intended), thanks for the links!

Did you receive yours yet? Does it look like it could handle getting wet?

Thanks!!

SeaDweller, I received it and installed it. It is sealed and appears as good as any. The space where it is located is probably hard pressed to get wet during noirmal rain driving. However, I do hose off the underside of the car when I wash it and it has held up for three weeks.

tobluforu · tobluforu's Garage

Do as mr. walker states " get a spal fan" They are the best! Flows huge amounts of air and are not to loud.

SeaDweller · 07-02-2002, 03:08 PM

I've got a Spal fan on my rear quarter condensor, and they are indeed excellent fans. They're also pretty pricey!!

Wayne 962 · Wayne 962's Garage

There is a BMW sensor that we sell that plugs into the top of the Carrera Oil Cooler, and turns the fan on at a much lower temperature. It's on page 6 here:

http://www.pelicanparts.com/catalog/shopcart/911M/por_911M_oilsys_main.htm

-Wayne

SeaDweller · 07-02-2002, 04:45 PM

Would that work on an aftermarket cooler Wayne?

kepperly · kepperly's Garage

I'll save wanye the time I had the BMW sensor hooked into my
stock carrera cooling system and it worked fine even though I believe it was designed for radiator coolant! the sensor is just an electrical switch that will turn on and off at a preset temp. What it turns on or off is of no conciquence. john walker is right you should route it through a current carrying relay and fuse useing the signal from the sensor to turn on the relaynot to carry the electrical "load"!
keith

kepperly · kepperly's Garage

one more tip, like i said i have an ad also for fans on ebay,
that have worked very well for all those that have purchased them so far and mine has been in use for 5 months now. just look at the date on the photos on ebay ad # 1840560797. works on my slant nose, but i did cut out the right rear brake duct and fit a mocal cooler smaller than the carrera oil cooler.and connected it to a mocal thermostat with 16an lines. i just ran a wire from one side of the coil on the stock relay to a manual switch and the other side of the switch to ground. from the poitive switched side of the relay to the pos. terminal of the motor and from the negitive terminal of the motor to ground. this way the load is isolated from the switch. and the relay carries the current flow.
keith