I think the 14" fan would fit, but looking at the dimensions it would overhang the top and/or bottom of the radiator.
That could potentially be worse for cooling as the path of least resistance for the air flow would be bypassing the rad altogether.
I reckon 12" might be a better bet.
Haven't bothered looking for a blank yet. I'll probably just use the Polo thermo-switch, I don't think they cost much.
Isn't one of the connections on the expansion bottle an overflow pipe?
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