Is $500 for the original Behr radiator? Look for an aftermarket brand. I am assuming you checked the thermostat. I put an aftermarket radiator in my car ($250) made by Nissens?? in Denmark. Everything fitted perfectly, no trouble so far, and the car runs a lot cooler.

__________________
2001 Dodge Ram 2500 Cummins Turbo Diesel - 4x4, auto, 3.54 gears, long bed
-------------------------------------
'92 300D 2.5 Turbodiesel - sold
'83 300D Turbodiesel - 4 speed manual/2.88 diff - sold
'87 300D Turbodiesel - sold
'82 300D Turbodiesel - sold