how do i tell if my viscous coupling is working??

not sure if my fans working properly i never had a problem with the temp on my 90 even after 3 hrs of off roading it always stayed in the middle of the guage or would go down to under a quater(i assume thats when the fan kicks in?) but after an encounter with a large bomb hole water section where the water came upto the windscreen and got our feet wet it seems to now creep up to about 3/4 and will only come down a bit if you put the heater on full whack, have i knackerd it? or how do i tell if the fan is working properly if atall?..ta rich

with the engine hot there should be resistance if yer try to turn the fan by hand..................after yer turned the injun back orf of course

yer dunt need the fan anyway - take it orf and bin it.
I aint got one on mine and nevva had a problerm, even in traffic on a hot day.

what engine are you runnin tho??
surely if the motor heats up then a fan is needed to bring the temp back down??

200TDi
the rad on deependers is fookin huge - keeps it plenty cool enough.
remember, a doozel runs more efficiently the hotter it is (within reason).
my temp gauge sits between 5/8 and 3/4, depending on road speed and ambient temp - perfick.

so is 3/4 on my old 90 td acceptable?
am i worrying for no reason

if it aint in the red, it aint a problem.

once you have checked the fan check for mud in your rad fins

A good way to check if the viscous bit is working is to stick your fingers into the fan when the engines cold with the engine running. If the fan stops the viscous bits ok. If you have difficulty picking your sarnie up later in the day the viscous bit is fooked an so is yer hand.

GRUNT said:

A good way to check if the viscous bit is working is to stick your fingers into the fan when the engines cold with the engine running. If the fan stops the viscous bits ok. If you have difficulty picking your sarnie up later in the day the viscous bit is fooked an so is yer hand.

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so how do yer check its acturlay working when its hot?

and still be able to pick up yer sarnie next day

My TD ran at less than a third on the temp scale, never saw it beyond that.

What sort of state was the water you drove through?
Its more likely that the rad is half blocked.

true never thought of that it was pretty muddy water

slob said:

so how do yer check its acturlay working when its hot?

and still be able to pick up yer sarnie next day

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Use the hand you don't use to pick yer sarnies up wiv.

To safely test if a viscous coupling is working put some tape around one of the fan blades and stick the other end to something solid that will stop the fan spinning then start up the van. Once the engine gets hot enough to require the fan to work, if the coupling is woring it will snap the tape easy as pie - so long as you dont go banzai on the tape job !! Just a couple of strips to stop it spinning when its cold

HTH
Westy

Why not just stop the engine when it's hot and see how easy it is to turn the fan by hand.

GRUNT said:

Why not just stop the engine when it's hot and see how easy it is to turn the fan by hand.

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thats too fooking easy mr grunt

GRUNT said:

Why not just stop the engine when it's hot and see how easy it is to turn the fan by hand.

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Yes - this will work too - but it aint half as much fun !!

I take it that the fan will still turn when the engine is cold or is my vc broken?

they usually still turn because of the drag inherant in them but not with the same ommph! and certainly not using as much power as when its hot.