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Pud237 · 28-04-2008

Right, my 156 3.0 has a small issue with cooling, which I want to do something about before the height of summer. Its got a brand new radiator on, but it does run a touch hot. Obviously when cruising at a steady speed it is fine, but in traffic the temperature rises quicker than I'd like, and the fan comes in to bring it down, which it does (slowly)

But right now, the top resistor has failed and has been taken out, so the fan isn't coming on at a high speed, but a fixed 'medium' speed. Which got me thinking about my options:

1) Replace top resistor, fan speed will be a bit higher and the car will cool a bit quicker.

2) Replace top resistor with a non-temp sensing resistor, so that once the temperature goes over the threshold to activate the fan, the fan comes on at full speed as if the car was fully overheating

3) Do either 1) or 2), and also hardwire in a switch, probably mounted in the ashtray, so I can manually turn the fan on or off.

Any comments?

28-04-2008	#1 (Post Link)
Pud237 AO Platinum Member Join Date: Apr 2006 Location: North Yorkshire Posts: 13,100 Member car: Alfa 156	Fan Speed Right, my 156 3.0 has a small issue with cooling, which I want to do something about before the height of summer. Its got a brand new radiator on, but it does run a touch hot. Obviously when cruising at a steady speed it is fine, but in traffic the temperature rises quicker than I'd like, and the fan comes in to bring it down, which it does (slowly) But right now, the top resistor has failed and has been taken out, so the fan isn't coming on at a high speed, but a fixed 'medium' speed. Which got me thinking about my options: 1) Replace top resistor, fan speed will be a bit higher and the car will cool a bit quicker. 2) Replace top resistor with a non-temp sensing resistor, so that once the temperature goes over the threshold to activate the fan, the fan comes on at full speed as if the car was fully overheating 3) Do either 1) or 2), and also hardwire in a switch, probably mounted in the ashtray, so I can manually turn the fan on or off. Any comments? Back on the road: Alfa 156 3.0 24v V6, Silver with red leather, Q2 diff, GTA Teledials, headlights & inlet manifold, AutoDelta carbon intake, decat pipe and SuperSprint rear box, FK coilovers, Dastek Unichip - my 245bhp beast! Gone but not forgotten: Alfa 156 2.4 JTD Veloce, Vela Blu, Angel 'mad map' & BMC CDA, Ferodo DS2500s - the fastest tractor in town! AO 'Bratpacker' No 5.