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YOUR RESEARCHRunning temps
Leading reported evidence
Install with an electric fan
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These radiators are each fitted with an electric fan.
Leading evidence: 'Install with an electric fan' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install with an electric fan' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
I'd be willing to bet that a good number of 996 owners are running around with blown radiator fan resistors on their cars.
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Suggestion
PSA: Durametric can actuate both fan speeds without running the engine or bringing it to temp.
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Suggestion
If you're concerned that your car is running hot, check to make sure that both of your radiator fans are running on the low-speed setting.
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Suggestion
An easy test is to turn on your AC, which will automatically run both radiator fans on the low setting.
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What are some of the typical (normal) engine temps you're seeing while driving along? I live in Houston and noticed the temp gauge will creep up closer to the line between the 180 & 250 mark and just wondering if thats normal?
Live in Florida and had a very similar question when I bought mine back in October. This is as far "hot" as mine gets before it begins to cool itself and slowly start to make its way back toward the left edge of the "0." Tends to happen if I'm riding in traffic. It definitely worried me at first when I got the car but 1) My Indy said its normal and 2) it hasn't gone past the right edge of the "0" YET. But I keep an eye on it nevertheless. Curious to hear what others say.
+1
If you're concerned that your car is running hot, check to make sure that both of your radiator fans are running on the low-speed setting. If one (or both) of the fans is not running then you have a blown resistor on that side. An easy test is to turn on your AC, which will automatically run both radiator fans on the low setting.
I'd be willing to bet that a good number of 996 owners are running around with blown radiator fan resistors on their cars.
On my 99 Cab, the dash gauge can go all the way to the last white line before the low speed fans come on, but I suspect that later model years cars behave slightly differently, as Porsche has slowly and systematically changed that dash gauge so that it strays less and less away from perceived �middle� so as not to alarm owners.
You can plug in a Durametric and check your DME temps: ECTS metric (Engine Coolant Temperature Sensor), or buy a cheap Bluetooth dongle and hook it up to the ODBCII port and measure your temps.
Here�s how the fans work on these cars:Electric fans
There are two radiator modules installed in the front of the vehicle (on the left- and right-hand side). These radiators are each fitted with an electric fan. They can be operated at two speeds and are activated by the DME control unit whenever the following conditions apply:
Electric fan, speed 1
(Ground to DME control unit, terminal 35)
Coolant temperature higher than 96.75�C or air conditioning switched on.
Electric fan, speed 2
(Ground to DME control unit, terminal 36)
Coolant temperature > 102�C or air-conditioning fluid pressure switch closed (coolant pressure > 16 bar).
Note: The electric fans for the radiators are only triggered when the engine is running!
Thanks guys. I'll do the A/C process and see if they are both running as now I'm wondering myself. Although I never run the A/C (it's a convertible) but will do that today. With most responding that it's running in the normal temp range, I would like to make sure both fans are working as well. Thanks for the suggestions!
IMO, the low speed fans are not very loud or noticeable, which is by design. They will likely come on in very heavy stop and go traffic after about 30-40 mins or driving. At highway speed, they will likely never go on.
PSA: Durametric can actuate both fan speeds without running the engine or bringing it to temp. Which is how I discovered my low speed resistors were toast.
This is a source reference. Confirm exact model applicability in the original material.
