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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHNormal Coolant Temps
Leading reported evidence
Install with an electric fan
Performed · outcome unconfirmed
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Performed · outcome unconfirmed
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 'Clean radiators out' (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 · Original poster
Currently, I am in the middle of cleaning the radiators out.
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Suggestion · Original poster
I guess I will look into testing the ground tomorrow, assuming i can track it.
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17 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Being that it's getting hotter here already, a few days in the 80s. I noticed the coolant temp riding up a bit in stop and go traffic.
I checked it with the OBD Fusion app and was sitting at about 218-220. I didnt ever see it rise about that.
Is this normal? Safe operating level?
I also happened to notice the digital speedometer and OBD Fusion were off by a few MPH. When compared to my GPS that was also a different speed.
OBD Fusion: 63
GPS: 65
Digital Speedo: 66
Which is most trustworthy?
If your ac was off the cooling fans wont operate until those temps. If your ac was on then those temps are not out of line for stop and go hot day traffic. But i would still have a look and make sure things are working like both front fans and whens the last time the bumper was removed for a radiator clean up?
Not sure if they kicked on. I just leave the AC pretty much the entire time. Forget about it as it turns on everytime you go to auto mode.
I've had the car about 9 months and havent done it myself. Maybe I will make that a project this week or next as Inwont be working.
How long since you did it last?
Now I'm even more curious what I will find. I dont know when it was done last.
I want to try and do it tomorrow, but the gf is off and coming over in the morning. I dont think I'll get to it.
I'm in that boat. I know mine spent some time in SoCal previously and in LV. Curious what I'll find.
I am going to try tomorrow afternoon or Thursday, but that depends on what the gf has planned for us. If not, Friday is my goal to be completed.
At what point are the fans on? When do they jump to high?
Currently, I am in the middle of cleaning the radiators out. Will post pics in a bit.
The passenger fan comes on instantly with the AC on while the driver side is off. Then when jumping to high, both come on. Is this normal? Or am I looking at a faulty fan or short for the low speed.
Not normal. Both fans should come on high or low.
Electric fans
There are two radiator modules installed in the front of the vehicle (on the jleft- 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!
Engine bay fan:
The engine compartment purge fan rarely comes on.
From the service manual...
"Switch-on conditions for engine compartment fan (this fan pulls air into the engine compartment) The engine compartment fan is switched on when the engine compartment temperature is > 176 degrees F or the coolant temperature is > 216 degrees F.
After-running of engine compartment fan
If the ignition is switched off and the engine compartment temperature is more than 140 degrees F, the
DME
control module remains in readiness for another 20 minutes. During this time, the engine compartment temperature is retrieved every 10 seconds. If the engine compartment temperature is > 185 degrees F , the engine compartment fan is switched on for 20 seconds. If the engine compartment temperature is still > 185 degrees F after this time, the fan remains on for a further 30 seconds."
Here is the long explanation from the service manual on the flashing coolant light.
"Four functions of the coolant warning light:
1. Engine coolant level too low -- light flashes slowly (0.5 Hz)
2. Engine compartment temperature too high -- light flashes slowly (0.5 Hz) (engine compartment blower might be faulty)
3. Engine coolant temperature too high -- light is lit; pointer on the right
4. Temperature sensor at water outlet faulty -- light flashes rapidly (1 Hz) ; pointer on the right
Note: The temperature warning in point three is indicated if the conditions "engine coolant temperature too high" and "engine coolant level too low" are present simultaneously."
Terminal 35, I assume would be in tone of the large round connectors?
I am assuming it's more likely for the fan to have a malfunction than the ground going out. I guess I will look into testing the ground tomorrow, assuming i can track it.
Before and after of the radiators and the AC condensers.
Before
After
Quite a bit of crap, dirt, buildup that was removed and found drivers fan not working on low.
Time to troubleshoot that tomorrow.
This was more of a curiosity thing. I am used to my motorcycle being about 10% high on the speedometer reading.
Figured the OBD may be known to be most accurate being that its computer driven. Then again, it wouldnt make sense for that to be off from the digital reading on the dash.
Hi guys
Im certainly not an engineer so I prefer asking the question: would it be benefic for the engine to have this fan on most of time, especially at idle?
I guess a cooler engine bay would help control / bring down coolant temp. or atleast ease the work?
The engine bay? Not really. The front radiators? Probably. 95% of engine cooling comes from the front radiators. The oil cooler is is a water-to-oil cooler, not an air-to-oil cooler like the air cooled cars.
The problem with how this engine is designed has to do with where the coolant sensor is located. It�s better to have cooler front radiators for temperature spikes. Which is possibly why the manual usually indicates to leave the AC button on the air conditioner turned on.
This is a source reference. Confirm exact model applicability in the original material.
