I guess there's no real way, one pipe in, the other out. Anyway, in case of a problem, (blocked rad, valve into the cooler), I guess the oil pressure would drop to 0, this lightening all red lights on (oil pressure, stop & water temp). I tend to guess that an oil cooler isn't necessary, even for racing purposes, moreover hillclimbs are not like Le Mans 24. I'd rather bet on a twin cooling fan (like Diesels).Ok so now i`ve got one to fit to my 1.6.... which way up does it go as i`ve seen pictures of it both ways.