GQ Thermo Fans
Submitted: Friday, Sep 09, 2005 at 08:17
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Chambo
Hi all, The oil filled fan in the GQ recently failed. It was also very badly cracked and needed replacing anyway. I was keen to fit a set of thermo fans of a AU falcon as these setups are very popular swaps for a whole range of cars. I purchased the fans from Ford and the adjustable switch/thermostat from Repco along with 2 x 30amp Relays. The fans were very easy to fit as it turned out. If you turn them upside down and remove the bottom lip they fit straight in without any other modification. They fit slightly to one side so as to clear the bottom radiator hose. I made up some very simple brackets and used the existing bolts and holes that held the original shroud on. The Thermostat took a few goes to fit without leaking. The rubber sleeve provided with the kit needs to be shortened slightly as it overlaps the radiator top hose lip which was the cause of the leak. Once shortened there was no problem. I used 2 hose clamps though. I wired in two relays, one for each fan. They work a treat and boy, do they move some air. They only run for about 20 to 30 seconds to bring the temp back. I did get the fans for the right price through a friend in the trade, but all up the cost was around $300. They look like they were made for it. Regards, Glenn
Reply By: Truckster (Vic) - Friday, Sep 09, 2005 at 09:37
Friday, Sep 09, 2005 at 09:37
Just dont get them wet or muddy, they will die. Seen it on 4 trucks that came out with us over time.
AnswerID:
129255
Reply By: Member - Brian (Gold Coast) - Friday, Sep 09, 2005 at 15:48
Friday, Sep 09, 2005 at 15:48
Be very careful of
creek crossings now dude....
water and electricity don't mix all that
well....
AnswerID:
129329
Reply By: Sarg - Friday, Sep 09, 2005 at 23:01
Friday, Sep 09, 2005 at 23:01
Coventry's have got Davis Craig thermo fan kits on special this month if anyone's interested
AnswerID:
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Follow Up By: Truckster (Vic) - Friday, Sep 09, 2005 at 23:25
Friday, Sep 09, 2005 at 23:25
I hear that Repco also do
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Follow Up By: hoyks - Saturday, Sep 10, 2005 at 10:32
Saturday, Sep 10, 2005 at 10:32
I fitted one of those and it didn't last 12 months before the bearing froze up.
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383900
Reply By: Sarg - Friday, Sep 09, 2005 at 23:27
Friday, Sep 09, 2005 at 23:27
That's only if they have it in stock !!!
AnswerID:
129419
Reply By: Tuff60 - Saturday, Sep 10, 2005 at 00:58
Saturday, Sep 10, 2005 at 00:58
Chambo, those fans are the best bit of usable parts from modern Fords, have been using a set for about 5 years. But if your using a Repco or davies craig thermo switch, watch your temp gauge constantly. There is a reason they're cheap, as they get wet and then die. Get a solid state thermo switch in the temprature you want then either weld a nut(to screw in the switch) in to the top
tank of the radiator, or weld it to a piece
water pipe and put it in the top hose. The other bonus to doing this is it doesn't leak.
On another note put in a bypass switch so your fans don't come on going into deep
water as the motors in those keep turning, unlike davies craig jobs, which causes the fans to rub againts the radiator. I use a three way switch, on(temp controled), off, and on(constant), with a light that comes on the dash to tell me when the switch is in the off position. Constant is for keeping the temp down in hard going like soft sand or long climbs, lets the
water start off a bit cooler.
Hope all/some of this helps.
PS did you notice an increase in power and smoothness??
AnswerID:
129426
Follow Up By: Chambo - Tuesday, Sep 13, 2005 at 12:21
Tuesday, Sep 13, 2005 at 12:21
Hi Tuff60, The 3 way switch is a good idea. I can see that being able to turn them off going through
water is an advantage. I haven't noticed much in the power department but I am interested in seeing if the gas (LPG) usage is a little better. Usually get around 4.5 k/lt to and from work. I don't drive it for economy though.
FollowupID:
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Reply By: awill4x4 - Saturday, Sep 10, 2005 at 15:35
Saturday, Sep 10, 2005 at 15:35
I think the AU Ford thermo fans will only fit on a standard radiator. I've got an AU twin fan setup I was hoping to fit to my GQ with my "Large" PWR cored radiator and I had a look last weekend about seeing how it will fit. Short answer, it won't, the thicker core pushes it too far back into the pulleys. Pity about that, as I had to get a new dryer assembly for my air con and when he was testing the system he just noticed the viscous fan clutch assembly has just decided to stop working.
So now I need a new viscous fan coupling and a new fan blade as the original one is looking very ordinary with some cracks around the perimeter.
Interestingly enough, the air con guy suggested getting the auxilliary air con electric fan wired up to come on as soon as the air con is turned on. He said the pressure buildup in the air con lines is huge if the air con system doesn't run cool enough.
Regards Andrew.
AnswerID:
129475
Follow Up By: Truckster (Vic) - Saturday, Sep 10, 2005 at 17:13
Saturday, Sep 10, 2005 at 17:13
So now I need a new viscous fan coupling
I got 2 spares in the shed, you can grab one and try the re-oiling on it if u like. while ya at it, do the second one too :)
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Follow Up By: awill4x4 - Monday, Sep 12, 2005 at 19:12
Monday, Sep 12, 2005 at 19:12
I might do that Bruce if that's OK. Even if it's just to compare the diesel one versus the petrol one. I'll give you a ring during the week.
Regards Andrew.
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Follow Up By: Chambo - Tuesday, Sep 13, 2005 at 12:28
Tuesday, Sep 13, 2005 at 12:28
How much wider is your aftermarket radiator? I have about 1.5 inches between the pulley and the fans. Don't forget that you need to cut about a 3/4" section on the top of the fan and them turn them upside down to fit them. They then sit nicely against the radiator.
FollowupID:
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Follow Up By: awill4x4 - Tuesday, Sep 13, 2005 at 22:52
Tuesday, Sep 13, 2005 at 22:52
Chambo, I think the problem lies in the fact that the core I used was a factory K&J thermal products/PWR one to suit a Ford Bronco/F100 with was about 40mm narrower than the GQ one, the height was the same. (about 460mm from memory) I just made larger endtanks so the overall length was the same. The core thickness is 57mm (2 rows of 26mm tubes) but the header plate assembly is thicker again than the standard GQ.
It was only a quick look late in the day I checked the fans but I think it'll be a really tight fit if at all.
I'll just hang out till I kill the TB42e and put in a stroker 355 Holden or an LS1 ;-)
Regards Andrew.
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