Author Topic: Coolant fan  (Read 1461 times)

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Offline chezan

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Coolant fan
« on: May 18, 2018, 12:35:24 PM »
Hi all
V6 Calibra 1994
I have rebuilt the car with nearly new everything spent about two years on it there is one problem I can't get to the bottom of.
The coolant fan kicks in as normal after a run then cuts out after around 20 mins so far so good, it then decides to cut in and out for the rest of the day while parked up and cold? I have changed the coolant bridge sensor and the rad sensor and also saw a post about fuse two so changed that also someone said that It could be the ECU? any help on this would be much appreciated.

Offline Faur Sergiu

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Re: Coolant fan
« Reply #1 on: May 18, 2018, 17:55:20 PM »
 the fan starter (radiator sensor ) don't know what is called in english, try replace that if not check  the wires

Offline TURBOHEAD

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Re: Coolant fan
« Reply #2 on: May 18, 2018, 19:48:39 PM »
Hi guys

You also will have a fan relay...........not sure where it is on a V6.............A faulty relay can cause running problems.

Hope this helps.

Offline Faur Sergiu

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Re: Coolant fan
« Reply #3 on: May 18, 2018, 21:32:08 PM »
Hi, yes thats a good idea to check the fan relay

Offline chezan

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Re: Coolant fan
« Reply #4 on: May 19, 2018, 09:34:46 AM »
Thanks for the advice so far. Managed to find a new fan relay In Germany so will let you know the outcome. Cheers

Offline chezan

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Re: Coolant fan
« Reply #5 on: May 25, 2018, 13:57:04 PM »
Hello all
The relay arrived this morning but unfortunately, It was not to be I unplugged the coolant fan to check the connection and noticed that the air intake fan was running and the alternator fan!! so I have the three fans running on for most of the day unless I pull the fan relay out. Anyone got any Ideas ?. Just to clarify the fans do not kick in on startup only after the car has been running for  20 mins or so.
Thanks In advance

Online agw9262

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Re: Coolant fan
« Reply #6 on: May 26, 2018, 10:41:09 AM »
On the v6 you have two control systems, the rad thermostat powers the main cooling fan mounted to the rad. Then the coolant temp sensor in the coolant bridge controls the circuit that enables secondary cooling - the secondary water pump and alternator cooling fan. Sounds like the latter circuit has a fault and/or the CTS is faulty - a no longer stocked item so fingers crossed you can find a fault elsewhere in the circuit.

Offline chezan

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Re: Coolant fan
« Reply #7 on: May 26, 2018, 13:46:13 PM »
Thanks for that Info really helpful. Before I get Into auto electrics I will change the coolant bridge sensor again as the one I put In was not new as I could not find one, managed to find a new one on the bay It says It will fit the v6 so here Is hoping It does and solves the problem. Once again thanks for the Input.

Offline chezan

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Re: Coolant fan
« Reply #8 on: June 09, 2018, 14:55:34 PM »
 :) Job done There are three sensors on the coolant bridge the largest of the three which Is also doubles up as a bolt to tighten down the bridge Itself was the problem I was  lucky to find one in Germany , an easy fix took about 5 minutes plus bleeding time the fan now cuts at around 95 for about a minute then goes on and off at It should around that temp no more running on once the car Is parked up Thanks for all the help and suggestions. Happy motoring at last.............

Online agw9262

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Re: Coolant fan
« Reply #9 on: June 09, 2018, 14:58:33 PM »
Excellent and thanks for the update - I don’t suppose you’ve got a pic highlighting the location of the three have you? Would be a useful reference.

Offline chezan

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Re: Coolant fan
« Reply #10 on: June 09, 2018, 15:52:39 PM »
I  can do that In the next few days no problem.

Offline chezan

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Re: Coolant fan
« Reply #11 on: June 15, 2018, 14:43:47 PM »
Hi all
Pics of sensors as promised the one on the far left was the culprit and took a year to find as a used part.

Offline chezan

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Re: Coolant fan
« Reply #12 on: June 15, 2018, 14:58:09 PM »
Thought you might like to see the actual car!!

Offline chezan

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Re: Coolant fan
« Reply #13 on: June 15, 2018, 15:00:45 PM »
Sorry that pic of the sensors Is a wee bit small this one Is better

Online agw9262

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Re: Coolant fan
« Reply #14 on: June 15, 2018, 15:52:04 PM »
Great, thanks - and nice car!