hi all i am looking at fitting an electric fan,and am wondering on how to tuning it on and off, what i was thinking is drilling in to the thermostat
housing and tapping the hole and fitting the a switch like the one in the link
is this a dump idea or not?? also the stat/switch in the link is a little bit two low? engine is a 1.6 pinto i figure i need a switch around the 95
mark???
any help is aprciated,
snake
link
Better to weld a boss in a piece of pipe that will be cut into the top hose a bit further away or getting a rad with the boss in it already.
The Polo rad comes with a boss for a sender unit. 95 degrees is about right but bear in mind the rad will be a bit cooler than the block.
If you scan through the websites like http://www.nfauto.co.uk/ and a few others they do a thermostat switch allready mounted in a piece of metal tube
which you cut into the top hose.
Whilst I have no experience of the Pinto I would tend to to set the thermostat a bit cooler. I have a well tuned 1600OHV engine which runs at about
85degc when I get spirited in the car. If I set up the thermosatat at 85degc, if I run into the back of the traffic jam it soon gets very hot before
the fan can catch up. By setting it a bit cooler it doesn't get any hotter
Ideally it is the radiator core temperature the fan switch should monitor. But it dosen't really mater that much if the switch is located in the
top hose.
If the switch is in the top hose it would normally be one that switched on at a hotter temperature (for example circa 95c) than one mounted midway
down the radiator (for example closer to 85c).
Of course must make sure you have a thermostat and a by-pass hose connection to allow water circulation when the thermostat is closed.
[Edited on 11/3/08 by britishtrident]
I drilled and tapped into the thermostat housing on my pinto - used the biggest threaded thermoswitch I could get - BMW, M18 thread as the casting isn't very thick. No problems so far!
i should of said the engine is in me capri but dont think it matters, i didnt really want to cut the top hose if i can help it, i need to replace my rad so i may look at fitting a rad with a switch in it! cheers snake
quote:
Originally posted by gregs
I drilled and tapped into the thermostat housing on my pinto - used the biggest threaded thermoswitch I could get - BMW, M18 thread as the casting isn't very thick. No problems so far!