Description Reviews Need a replacement radiator? Here's a new aftermarket radiator that will fit your Gen #2 Base Model Cooper that fits a N12 or N16 engine type. These are notorious for leaking on the base model at the tank to tube gasket. This radiator mounts to all factory points so no modification is needed. Caution should be taken during install not to damage the fins. CSF built this radiator with OEM style plastic tanks and is manufactured with higher performance brazed aluminum core and it gets rid of the tank gaskets that where very prone to leaking. It is common for the base model coopers to have the water pump, thermostat, and radiator have issues at the same time. It's a little bit of a domino effect, once one cooling part goes on a base model cooper the rest are soon to follow.