I currently have a ford Cortina/transit rad on at the moment and im replacing for a polo rad.
it doesn't have a filler neck. will an inline one do the job fine.??
don't need an expansion tank does it ??

A pressurised expansion tank is a better solution, Rover 25 tank is a popular choice (NB Rover 25 not 45) the top outlet on the tank connects to a high point on the engine or radiator and the bottom connection goes to a low point on the engine or bottom hose or radiator.

Also drill a single 2mm or 2.5mm hole in the thermostat valve plate, it helps prevent air locks and makes the thermostat respond faster.

[Edited on 10/8/13 by britishtrident]