My 4x4 Sapphire runs at about 87 degrees when driving normally but if I sit in traffic the temprature rises to about 98 degrees when the fans cut in. The problem I have is that the fans seem to struggle to get the temprature back down to the point where they cut out again.

The engine water temps drop to around about 90 degrees when stationary with the fans on and slightly lower when the car is moving. The car does have an RS500 intercooler fitted which will restrict air flow a bit , but I have fitted a PACE 50mm rad and have also replaced the fans with a set from Pro alloy. Have also changed the fan sensor and fitted a new seperate fan loom. I fitted the new loom as I was worried the old wiring may burn out with the fans running for such long periods of time.

Does anyone else have problems with the cooling fans running for long periods of time? Is there anything I can do to improve the cooling?

PS also have a high pressure header tank fitted and swirl pot.

 

My 2wd runs about 76< 80 when on a run,maybe 88 tops in traffic,but i do have a thicker alloy rad

cheeRS stu

 

Std fan switch is poor in an alloy rad. Too much heat convected to the switch body. We do an uprated one which switches teh fans off at teh corredct time.

 

Thats good to know as i've seen the same sort of thing.

Whats the price of one of those stu? PM if you wish

Regards

Paul

 

I would be interested in this too Stu as I found my fan runs almost constant after fitting alloy rad.

 

Unsure fellas, will check when i get to work tomorrow. Bloody fans are a mare, so we trialled many fanswitches and finally got one to perform perfectly as required, comes on about 94, and drops to about 90 then goes off.

Remember, fans should NOT be on when your moving.

 

I'd be interseted in one of these. how much?

 

Mine too.

 

why?
my cos has a manual switch. i just flick it in when pulling up traffic etc.

 

i would be interested as well

 

Another one here after price info for switch.....my fans also run for a long time since fitting an alloy rad, tbh never really bothered me as the fans ive fitted are mega quiet but if there's sommot to sort it, I may as well buy it

 

The prob on my car is down to the 110 mm thick cooler meaning the cooling air doesnt really get doing its job until 30 mph or so.

 

Sounds like a good idea Stu - I'm interested too mate

 

In that case aint you better leaving the standard fan switch in place? If its an actual air flow problem as apposed to a heatsink problem with the switch?

 

I dont have any cooling probs with the car whatsover and I keep a very good eye on temps.

I have the SPA water temp sensor in the head and the standard gauge wired to the top rad hose and the car runs about 89 tops but would like to bring that down to 80-85 if i could.

 

I have the exact same configuration even down to the Pro Alloy fans and mine is just the same, sitting in traffic the temps slowly rise and rise its as if the fans cant cope. The fans dont sit tight to the rad (about 1cm away) and i was thinking perhaps they are not close enough to pull the air through the rad and are pull air around the gap..

Interesting topic

 

also stu do these fan switchs fit the standard wiring plugs?

 

Its is quite intersting as I was contemplating replacing my standard fans with the SPAL ones from Pro alloy until I read your post..

 

just fitted my radtec rad yesterday run it up today with a brand new switch and the fans are nearly in all the time

 

i thought i had a more serious issue with my car with the hot running now im thinking it could just be the rad and fan combo..

Do have issues with low oil pressure though so engine could be on its last legs

 

Because the radiator is designed to cool your water by convection once air flows through it, IE, your moving. The fan is there to RAW the air through it when your NOT moving. Simple as that.



quote]

One of my pet hates when folk drop the car off for a setup and dont mention it ONLY works off a switch, then it sits there and boils over in my workshop. They are automated systems for a reason!


Yes mate.


Will price these up tomorrow for you all fellas. maybe i should have pushed these years ago, never crossed my mind.

 

Along the same note, what thermostat do you recommend Stu? - Do you have one that opens at a lower temp? (not too sure at what temp the standard one opens? - escos BTW)

Cheers

 

You dont have a problem? But you just said "The prob on my car is down to the 110 mm thick cooler meaning the cooling air doesnt really get doing its job until 30 mph or so" So....you do have a problem

Ive got the Spal fans fitted on mine, doesnt overheat whats so ever, only problem ive got is over cooling due to fan switch suffering from heatsinkage from the alloy rad its self. If you want to lower your temps even further down to 80-85, then a fan switch thats cuts out sooner aint going to be your answer imo. 80-85 actualy sounds a tad cold to me?

 

Ok, details as follows:
Our uprated switch will have your fans come on at 90 deg C and off at 87 Deg C and fits your existing plug.

Cost is Ł15inc vat.

 

And if Stu gets out the office and lets Will use the card machine I'd be able to order one Standing by with card now

 

The fans on my Cossie seem to cut in really early, but its a standard rad. Would this help that too?

 

Will phoned back asap....switch ordered Another smooth transaction from the MSD boys

 

Thanks Fellas..

 

Mines ordered too - thanks mate

 

will order mine tomorrow stu,if u got any left by then lol

 

Plenty left pal. Well, a few anyway.

If anyone wants one, just paypal the funds across to my account and add in the notes section that its for a fan switch. I will post them all tomorrow for you.

Note:
Overseas postage is Ł10 though instead of 3.

 

is it possiable to pay over the phone tomorrow stu?as my paypal is dead at the mo

 

Stu,
Payment sent via PayPal, hopefully you have some left!!

Will fit it at the weekend and see how the fans perform.

 

Of course it is, give me a call mate.

 

Thanks, will get it sorted tomorrow pal.

 

cool will do fella

 

Bet you wish you mentioned these sooner eh Stu?

 

whats your paypal Stu?

 

Sorry pal, thought i was on another topic:


Here is the address: sales@remapping.co.uk

 

i would be very wary about swapping the std fans for some universal aftermarket ones