Ok so I have a 1986 f150 4x4 with a 302 the motor is not running really hot only about 180-195 so a little higher than my average temp i usually sit at 182 and never go higher. The problem is when I stop and turn my truck off antifreeze comes spewing out of the little hole in the top of the exansion bottle. I am not loosing any antifreeze going down the road and the truck is not smoking at all it just dumps it when I turn my truck off. Any ideas guys? Thank you

 

Check or replace the radiator cap , check the fan clutch to ....Lew

 

Check the overflow tank & all hoses leading to it also...