20031118

my car is 2001 c4 manual .

i want to change Gear oil and manual transmission fluid ( some like gearbox oil ???)

this two can buy from porsche ?

how many i need put in the car - Gear and Manual transmission fluid ???

ma car is 2001 c4 , very slowly , mean's i need take 10-15 minutes to driving around town , the thermostat coming 190F~ it's normal ??

any one have advice for this , when i start at morning ( or car is cold ) the temperature is comming very slowly , maybe is water pump ?

Disconect the fan and ballast resistor cable. There are 3 pins in the connector, the black wired pin is the common ground (earth). The other two are the low and high speed leads to the resistor. The low speed wire will have an impedance of approx 1.4 ohms, the high speed will have zero resistance. To start, put the leads of the ohm meter on the taps at the motor. This will give you the impedance of the fan motor. My motor measures 540 ohms. The high speed line should measure the same and the low speed should measure 1.4 ohms more. I had 2.3 megohms resistance through both high and low speed lines which means the resistor was totaly fried. With some dexterity, this can be done without removing the fan assembly from the car. Check the resistance trough the pins first, if they are high, (thousands of ohms), the ballast resistor has failed. Then remove the fan assy and replace the resistor. I did all this yesterday, resoldering the new resistor is easy. Be careful not to get anything inside the fan motor.

James Greer

thank you james, i will follow your way try to fix this ...

PST2 and PIWIS are both Porsche diagnostic computers - most good shops have one or both.

Yes, check the fans using the tester.

thank you ~ i will find a shop. i want to know . if i didn't fix this . have any problem there ? because it's one year ago................( i never know have problem with fan....)

i have make appointment with porsche. but only one in the toronto area... the date- JUN 7 ,2008 ~ i don't like waiting for long time ~

every advice is very importance ~

Um... where are you located?

It is pretty unusual to lose a fan motor. It would be best if you can find someone with a PST or PIWIS to confirm your findings.

Toronto, canda ~ PST OR PIWIS means comupter ? check the fan ?

i check the Radiator Fan fuse and relays both ok.....

i try to stage 2...(turn the AC on)...... the high speed fan not working....

so..what i need to do next ...

thanks ~

:welcome:

The 4 relays for the fans are all the same - you can swap them to verify that it is not a relay.

If the relay change does not make a difference - then check the stage 2 part of the fan (turn the AC on).

If the stage 2 (high speed) fan works - the problem is likely the fan ballast resister on that side.

The spark plug DIY is here (you do not need to remove the read bumper).

forget one thing...... where is the relays.....

In the footwell, above and to the right of the fuse compartment. There will be 4 relays in a row, all the same type. Sockets 19, 20, 21 and 22. I am going through the same thing. I removed the right radiator fan last night. With a VOM, I read 2.43 megohms resistance through both leads on the ballast resistor which explains why the fan did not work. Now I am looking at the fan itself.

Not a bad job to do, just get the car about 8-10 inches off the ground and keep track of all the different types of fasteners and locations. It took me about 1 hour to get the car in the air, remove the right wheel, wheel well liner, front bumper and get the radiator fan out. You can clean the ductwork at the same time.

Good luck

James Greer

:welcome:

The 4 relays for the fans are all the same - you can swap them to verify that it is not a relay.

If the relay change does not make a difference - then check the stage 2 part of the fan (turn the AC on).

If the stage 2 (high speed) fan works - the problem is likely the fan ballast resister on that side.

The spark plug DIY is here (you do not need to remove the read bumper).

forget one thing...... where is the relays.....

:welcome:

The 4 relays for the fans are all the same - you can swap them to verify that it is not a relay.

If the relay change does not make a difference - then check the stage 2 part of the fan (turn the AC on).

If the stage 2 (high speed) fan works - the problem is likely the fan ballast resister on that side.

The spark plug DIY is here (you do not need to remove the read bumper).

thank you ~~ if the fan ballast resister~ how to fix it....

if i change the spark plug...do i need change the ignition wires or other parts~

thank you very much ~~

:) my car is 2001 c4. 45000 miles. my driver side Radiator Fan is not working~ i check the fuse. it's good~ have any advice ? also if i want to clean up radiator fan ....how can i take the front bump out~

if i need replacement the spark plugs. do i need take the rear bump ?

thank for any help ~~~