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Hi Jim,
First thing is to source a fan of suitable dimensions. The one I used came with a mounting shroud almost exactly the same size as the radiator on the brick. The two top mounting holes lined up perfectly with the rad holes and with some short bolts and nylock nuts held the fan nice and tight. At the bottom I used 2 big fat cable ties through the rad to hold it steady with some home made plates made from rigid PVC at the front of the rad to spread the strain. Sounds gross but it's fine.
For a thermo switch I used one sourced by a friend and believed to be from a 700, exact model unknown (he's not a Volvo afficionado). This mounted neatly in the port at the top of the rad on the left - rear, as you look at the car from the front.
I tapped into the fuse box at fuse number 11 (I think - the one used for the heated seats) as this is switched with the ignition and of a suitable amp rating (heated seats only used in the coldest of weathers and the fan is unlikely to activate in those conditions). I ran this to the thermo switch and then ran the other terminal of the switch to ground.
I then made up an independant circuit using a spare HRW switch, again powered from the same fusebox terminal, so I can manually switch the fan on and off if required.
The car runs fine and the termperature guage reads the same as before (a needles width under half). The only difference is it gets there in about a third of the time so cold morning warm ups are much quicker. The fan only seems to cut in when left idling for a while although it is rather cold outdoors in the UK at present.
No piccies i'm afraid as I don't have a digicam but I know a man who does and i'll try to get some posted when I can.
Hope this is of use/interest to you.
Good luck,
Big Rich.
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This is a 245 Volvo...d'ya feel lucky Punk?
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