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Yeah, with a rereoute I wouldn't want the coolant reading temp off only zero cylinders. It really only ever sees chilly radiator water there, plus whatever the mixing manifold adds back.
European NB's 1.6 have the NA 1.6 block, a better flowing head with mechanical lifters and the same eletronic of the 1.8 BP's: cam and crank sensors, ecu controlled fans, even the NB-fl 1.6 are OBD2