Re: light blink
A bigger radiator does help. on a 5.9L i am pretty sure the fan is electrical so you are good there. There should be some aftermarket electric fans that spin faster and longer to draw the heat away from the radiator. What I remember some guys doing is putting little water jets in the radiator to help keep it cool. They turn them on manually or sync to when the fan motor kicks in. I do not know how complicated that is to do though.