So my truck would randomly overheat and
then drop back down. So o changed the
thermostat. Now it still does it when I'm
driving normally and if it starts to do that
and I increase the rpm to over 2k it cools
right back down. Any advice 5.9L gas job
Might need to flush ur radiator real good that will help a lot after time a lot of trash will build up...or u need to pressure washer iron coils that will help out alot...try those 2 things and if it don't help might need to buy a new radiator.....
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