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Cooling Fans Acting Up
#21

No kidding!  Rock

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#22

I spoke too soon ! Yesterday , on a hot day , I made two long drives ( about an hour each ) and two short drives ( about 15 minutes each ). During, and at the end of all of them the fans worked perfectly . And then today ...back to the same high speed repetitive short cycles . WTF ?! How can it be made to work just fine for a day and then the next day it reverts to the old m.o. ?!
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#23

Sorry to hear. 

 

Clearly it's something with the resistors. Maybe one of the contacts is loose or has a kink? Would suggest focusing all your attention there - pull the leads, clean again, maybe actually crimp them onto the spades with needle nose pliers. 

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#24

It was the thingamajiggy at the end of one of the wires which slides on the thingamajig that comes out of the resistors. THAT was loose , so I just pressed it a bit with pliers and now that it stays firmly on, the fans are once again back to normal operating mode . In other words, ( using pdxmike terminology ) I believe what I actually did was crimp one of the leads on the spade .
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#25

Glad it's working - hope the fans continue to work well for the rest of your trip!  Smile

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#26

Just got back , they worked perfectly fine the entire time .
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#27

Wonderful! 

 

I have an "issue" with mine that I've ignored as long as I've owned the car - fan relay click-click-clicks as the low speed fan comes on - not really a problem as it only lasts three-five seconds and the fans otherwise work totally fine. I've done the basic tests and tried a different relay and everything has seemed fine, but the clicky relay issue has persisted. So now you've got me thinking that I need to take a second look at the resistors and tighten things up a bit in there. Another example of how all altruism ultimately ends up being self-interest Smile 

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#28

Could someone tell me the part number of the dual temperature sensor that screws into the radiator (has 3 male spade pins) and if you happen to know what page of the PET diagram for the 968?  I can't seem to find it. Look at radiator diagram and can't seem to find it.   My lower temp sensor doesn't seem to be working, only the high temp sensor.   

TIA

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#29

update:  never mind.  I found the part number.  It is 


951-606-481-00


 

also, I might need the sealing ring part number:  



<div>
<div>
<div>
<pre>
N 043 808 1 (A 22 X 29)</pre>
found in the PET section of the "electric fan".



</div>
</div>
</div>
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#30

don't buy cheap ones, they weld the contacts together, then the fan runs till the battery is flat

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#31

Quote:don't buy cheap ones, they weld the contacts together, then the fan runs till the battery is flat
Thanks, I've had that happen before.  I've order one from Sunset Porsche.
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#32

And use a torque wrench, the setting is surprisingly low. I am running the lower temp Vanagon unit, and I like that the engine doesn't run too hot, even in summer with the AC on.

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#33

Quote:And use a torque wrench, the setting is surprisingly low. I am running the lower temp Vanagon unit, and I like that the engine doesn't run too hot, even in summer with the AC on.

Ok. Do you recall the torque setting?
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#34

28nm if you have a brass insert in the radiator, more likely yours is plastic, so 20nm. If you have any other torque questions look at Clark's garage online. Lots of helpful information on there.
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