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I actually had a problem with the engine compartment fan not coming on when expected, and indeed it seemed to be a worn out relay, so such things are certainly possible (this was on a 2000S with 48k miles).
But concerning the radiator fans...is there any mode in the AC diag that accurately tells you radiator fan speed? I tried the line item 'fan speed' but hasn't budged from 0 even tho I know the radiator fans are on.
Also, for what it's worth, my car in Los Angeles goes from 90-92 coolant temp at 80mph on the freeway to 100-103 idling in traffic. I need to clean the radiators still, but I'll bet it only buys you a few degrees at the most. Still, I'm getting over the fact that 103 isn't that hot, I probably wouldn't worry -too- much..
One more for Jim, where did you get that 60% engine-cooling-from-oil number? Are you referring to just Boxster engines?
-David
Ocean Blue 2000 S
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