hey guys..i have a problem with my 99 magnum 500...i blew a hose one day and lost my coolant one day so i hauled it home..i took it to the dealer and they fixed the hose an topped it off..now my light keeps coming on sayin its over heating...my fan is working but it seems like my rad is blocked or something...when i go fast the light stays off but once i slow down on a narrow trail the light will come..its like its not gettin enough air goin slow..so would my rad be so dirty its blocking air and limiting the air when i go slow? any info would be good..