Cooling

Author
Discussion

adamb

Original Poster:

418 posts

291 months

Wednesday 28th August 2002
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In advance of a track day last week I thought I'd do the fluid levels and check the fans. Did the leave the car running on the drive bit, first fan came on at about 97-98 (Indicated) and then the temp dropped so I never got a chance to check the second fan.

I do want to check it out before it goes for a service as I'm a long way from the dealer and want to sort as much as poss in one go. Any suggestions.

RolexBlue

199 posts

271 months

Wednesday 28th August 2002
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I guess the Cerbera’s are a bit different but the fans in my Chimaera come on together are you sure they should be coming on one at a time?

Paul

jurdy

262 posts

291 months

Wednesday 28th August 2002
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I have a 4.5 Cerbera and have just had a few little gremlins sorted out. The big fan (near side) should come on first, usually on my car at about 102-5 degrees and the smaller one ( with the greater amount of blades)usually kicks in above that when sitting in traffic. It is perfectly normal for this to happen. Just ensure that they do kick in and do action at a constant temp on the guage every time. The guages themselves do tend to be a little out so as a rule of thumb as long as they come on at the same 'indicated' temp every time then no worries, just ensure that you check your coolant levels every week during the hotter weather periods.

david beer

3,982 posts

274 months

Thursday 29th August 2002
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I think your "baby" fan should be on all the time the A/C is on?

ro_butler

795 posts

278 months

Thursday 29th August 2002
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Not sure about the aircon bit but the fans are certainly supposed to be staged. The big one coming on first.

Bear in mind that the gauge is not accurate, but as long as when the fans come in the temperature drops then you are ok.

If the gauge starts playing around ('flicking around') then chances are you have air in the cooling system.

Rob.

david beer

3,982 posts

274 months

Friday 30th August 2002
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Does the baby fan not come on with the a/c on? Just interested.

jurdy

262 posts

291 months

Saturday 31st August 2002
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Pass on that one, will give it try later and let you know.

jurdy

262 posts

291 months

Saturday 31st August 2002
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Pass on that one, will give it try later and let you know.

adamb

Original Poster:

418 posts

291 months

Saturday 31st August 2002
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Main fan comes on as part of AC. It looks like the baby fan comes on only once the main fan is on and temps still rising. Although I can't get the temp up any further once the large fans kicked in to test it.