Koyorad Manual Alloy / Plastic Radiator for Nissan Patrol GQ TD42High Quality Koyorad Standard OEM Replacement 2 core Radiator for Nissan Patrol GQ with the TD42 Diesel Engine. Alloy Radiators have superior cooling properties over the Brass Copper Radiators so if your looking better performance this is the way to go. Its also a common myth that adding a larger radiator, in this case, changing from a standard 2 core to a 3 core will improve cooling, but in fact the larger water capacity will take a minimal amount of