Fan switches

Alley Kat · Post by **Alley Kat** » Thu Aug 09, 2007 8:50 am

What temps do production (i.e. scrapyard) fan switches generally trigger at? Are they all similar, or is there much in the way of temp differences at which they go 'continuous'?

ta
bill

Post by **katanaman** » Thu Aug 09, 2007 9:49 am

They seem to be all different between manufacturers for examle all BMW seem to be 91-99 c , VW/Audi 85-102 c , Porsche seem to have 2 85-93 and 87-92. The more common ones dont seem to be well published at all. I ended up going for an adjustable electronic one to save any hassle.

Alley Kat · Post by **Alley Kat** » Thu Aug 09, 2007 9:56 am

Cheers Marki, I'll hit the yards then and see what turns up,
Bill

ChrisJC · Post by **ChrisJC** » Thu Aug 09, 2007 10:57 am

Some cars (Astra 1.7 diesel) have a two speed system with two sensors. Slow speed for 88-93 and high speed for >93.

Chris.

Alley Kat · Post by **Alley Kat** » Thu Aug 09, 2007 11:19 am

Ta Chris,

Bill

Post by **Coops** » Sat Aug 11, 2007 9:45 am

i use an audi one, mine comes on around 89 ish,

renault espace use a two stage switch(where my fans came from), one side triggers one fan, the other side triggers both fans when the coolant gets to hot, i was going to use this set up but lost the switch and stuck with the audi one and wired it up so both fans came on.

Alley Kat · Post by **Alley Kat** » Sat Aug 11, 2007 2:29 pm

cheers T ...

Ian Anderson · Post by **Ian Anderson** » Mon Aug 13, 2007 11:58 am

Ford ones are colour coded

Speak to a good factors shoppe and they will be able to tell you what order they go in and you can then pick the one you like

Ian

Alley Kat · Post by **Alley Kat** » Mon Aug 13, 2007 1:34 pm

Ta Ian. Got a decent one in town, luckily.

The Original Tom · Post by **The Original Tom** » Mon Aug 13, 2007 11:58 pm

It's a Land Rover accessory, I know, but it would work in any vehicle. And it's good because it'll take fan current so there's no need for extra switches / relays.

http://www.x-eng.co.uk/X-Therm.asp?MID=38

HTH Tom.

Alley Kat · Post by **Alley Kat** » Tue Aug 14, 2007 12:20 am

Posh! Cheers.

ppyvabw · Post by **ppyvabw** » Fri Aug 17, 2007 10:57 pm

katanaman wrote:They seem to be all different between manufacturers for examle all BMW seem to be 91-99 c , VW/Audi 85-102 c , Porsche seem to have 2 85-93 and 87-92. The more common ones dont seem to be well published at all. I ended up going for an adjustable electronic one to save any hassle.

Is it one of those ones where you stuff the copper pipe/sensor thing down the inside of the hose or is it one that is a proper tube that the top hose fits onto.

Not sure if I like the former, it seems a bit half arsed. Has anyone else got any opinions about them/ had trouble with them leaking.

I have a ford granada switch in mine (I think if I remember correctly) and there are different values like Ian said.

Eliot · Post by **Eliot** » Sat Aug 18, 2007 6:57 am

ppyvabw wrote: Is it one of those ones where you stuff the copper pipe/sensor thing down the inside of the hose or is it one that is a proper tube that the top hose fits onto.

Not sure if I like the former, it seems a bit half arsed. Has anyone else got any opinions about them/ had trouble with them leaking.

I have a ford granada switch in mine (I think if I remember correctly) and there are different values like Ian said.

Thats the Kenlowe type, I have one. They seal OK if you use two jublie clips next to each other, so you have even pressure over it.

Post by **katanaman** » Sat Aug 18, 2007 8:53 am

No I didn't use the Kenlow type as I don't fancy the coper capillary tube thing. I used one of these instead:

The Original Tom · Post by **The Original Tom** » Sat Aug 18, 2007 5:46 pm

katanaman wrote:No I didn't use the Kenlow type as I don't fancy the coper capillary tube thing. I used one of these instead:

The same as the one from X-Eng, but that one doesn't require an external relay.
On the downside it's non-adjustable but the 2 ranges they sell will do for almost any engine.

ppyvabw wrote:Is it one of those ones where you stuff the copper pipe/sensor thing down the inside of the hose or is it one that is a proper tube that the top hose fits onto.

Not sure if I like the former, it seems a bit half arsed. Has anyone else got any opinions about them/ had trouble with them leaking.

I've had one for 2 years and it's never leaked. Just do up the jubilee clip and make sure the copper capillary sits in the rubber groove ok and it won't leak.