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Tiny · Joined: 10 Apr 2006 Posts: 502 Location: London, UK

Can anyone confirm if our single fan setups on the NA have 2 speeds of cooling? A medium and a high speed?

On Friday in traffic I noticed my needle crept way up to just before the red marker!

This weekend I checked coolant levels - No loss or leaks. It idled and run up to temp and thermostat opened OK too and I re-bled the system. I saw the fan kick in as it should bringin the needle back to just below the middle.

However this morning after driving at speed and then coming up to traffic and sitting the needle climbed up too high for my liking again.

I am thinkng a high speed fan setting is not fucntioning. Is there a way to test?
thanks
Tiny
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*****1981 - 924 - Auto - London, UK******

9XX Girl! · Posted: Wed Nov 03, 2010 3:04 am Post subject:

on my 84, there is only one fan speed.
However, if you turn the engine off at the key while the fan is still running, the fan runs on at a slower speed until the rad switch breaks open.

Short the switch with the ignition off, the fan should run slow. Then turn the ignition on and the fan should pick up speed. If it does not, you have a fault.
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924 (84) N/A 2 ltr - 5 Speed - BLACK - Project (looking for 200BHP, any ideas!)
924 (81) N/A 2 ltr - 3 Speed Auto - SURINAM RED (Metallic) - Near Original Spec (sticking with originality)
BOTH ON THE ROAD, BOTH USED EVERY-OTHER DAY

Tiny · Joined: 10 Apr 2006 Posts: 502 Location: London, UK

Thanks for that! All seems good there.
I suppose it could be the gauge reading inaccurately.

Been wanting to get one of those infra red laser thermometers, and now I have the excuse.

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*****1981 - 924 - Auto - London, UK******

datatrain · Posted: Wed Nov 03, 2010 5:43 am Post subject:

I had an instance long ago where I was convinced the car was overheating. Stopped in traffic the gauge climbed the scale. When moving again it came down again.
After screwing about to get it running cooler I discovered there was a bad ground and the temp gauge was showing high temps when actually it was normal. Strange as it seems the alternator ground was bad. Just a thought.
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'78 924 NA with Collector plate
33 year old car, with me for 21 yrs
Mint '92 318i BMW
Near mint '98 Buick LeSabre
VE7HFR

Tiny · Joined: 10 Apr 2006 Posts: 502 Location: London, UK

Yep, I've more than likely got grounding issues.

I've also got a connection issue with the circuit that makes my oil pressure needle, oil light, and brake light go absolutely nuts at random. Been trying to isolate that one for a while now....oh well...if it's not one thing.

However, apart from the little electrical niggles....am still loving the drive =]
thanks all
Tiny
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*****1981 - 924 - Auto - London, UK******