charlie luciano

iTrader: (3)

What size spanner is required for removal and re-fitting?

Many thanks in advance


Luciano

pacwest

Pretty sure it's a 21mm. If not it's a 22mm.

col93saphcos

iTrader: (2)

hi,pretty sure switch in to radiator is 29mm,seems that size on my fourby,col93saphcos

pacwest

Considering there are a couple different fan switches you might be right. My ugly little fan switch that was in my rad seemed awfully small compared to the other bosch switches I have seen in heads and intakes and it never came on at a good temp.

mechanic28

iTrader: (5)

adjustable pliers are your best friend fella

tabetha

I was thinking around 28-30mm, I just use socket.
tabetha

TurboShed

Anything to do with Cossie fans = FAIL.

Either put up with the repeated overheating problems, or buy a BMW, Vauxhall, Citroen, Volvo, etc. etc.

Mike1

Get one of Stu's switches, aftermarket fan loom - WIN!

tabetha

Cossie's don't overheat if all is correct.
I do 4-6 hours traffic stop start stuff some days, fan cycles on and off, the problem is the stat is trying to keep it at a set temp and the fan is trying to bring it down lower than the stat wants, wrong switch fitted by ford, and bad combo.
Mine cycles between 95C down to 92C set between these points, with my 88C stat, going to 92C stat next winter though.
The fan looms are in desperate need of overhaul though.
tabetha

Mike1

I must admit, mine has never overheated either....not even in the South of France sat in 27 deg C ambient heat in the stop-start traffic in Grasse.

However, I bought one of the Stu type fan switches and an aftermarket fan loom to try and future-proof the cooling system.

I believe the Stu switch cycles the fans more ...but for shorter run periods i.e it will not try and bring the temp down as low as the standard Ford one so it will generally be on for less time in one go......but will go through more 'cycles' in a given time period.

That's as I understand it anyway. I can't find the proper explanation that Stu did

charlie luciano

iTrader: (3)

I have the switch also have pro alloy fan conversion which runs lower current next addition is the fan loom


Luciano

Gazzonator

iTrader: (9)

I run one of MSD's fan switches and I made my my own fan loom and mines spot on!

tabetha

The switch that stu sells is a lot more suited to the job than the one ford fitted, yes it does cycle more but for shorter periods, as hysterises is closer, a defo worthwhile mod imo, even on a boggo std cossie.
The wiring issues though on cossies fans/pump are a must too.
I don't use a std ecu anymore so set to what temp I want, and 95C ON, 92C off seems to work well, on about 1 1/2 to 2 minutes each cycle, have me little fan led in the tacho corner lights up blue when it's on!!
Had no end of trouble with stats so use WAHLER now.
tabetha

Mike1

Yep just measured my switch - 29mm!

Bullseye224

have a fan and fuel pump loom and one of STU's switches to be fitted before the summer and feel better now! Is there any need for the thermostat at all??

charlie luciano

iTrader: (3)

Yes mate you must run the stat

Thanks for all your input people I'll buy myself a 29mm open ended spanner


Luciano

tabetha

Use adjustable, they are not tight.
You absolutely must have a stat, you will kill your engine without one.
tabetha

Mike1

The knack is to do it without changing the coolant! As you unscrew one, plonk your thumb over the hole......then stick the new one in really quick. The less coolant you lose ....the more skilful you are!

charlie luciano

iTrader: (3)

Lol I got fooking drenched more practice required


Luciano

tabetha

They defo don't overheat when right, spent 1 hour today crawling around less than 10mph, just idle speed in 1st gear most of the time, fan came on and off didn't even get bothered about it.
tabetha

Bullseye224

my 1990 sapphire has 57k on it and still using original water pump would it be advisable to change sooner rather than later, as in before 60k?

tabetha

The water pumps/cooling system on the 4wd are vastly better than the 2wd, if not leaking I would leave alone, unless maybe if you were worried ?
tabetha

Bullseye224

had planned to do it but might get an alloy header tank instead, is there an any aftermarket thermostat more suited to the MSD fan switch, as in with a different temp to 82 degrees so maybe the fans and fan switch would work better with the stat overall? (does that make sense???)