militarymustang88gt

latly i have been driving around my temps stay right at around 160-165 and i stop and water is gushing out of my overflow tank fill it up everymorning and check it in the afternoon and when i take the cap of even when really cold it sounds like a crap load of air rushing out like when it is hot but it would be after not driving for 8-9 hours what could be causing this?

PX429

So let me get this strait. Your car is not everheating but you are losing coolant?


Is it only your overflow tank that is losingcoolant or does your radiator lose coolant also?

mattdel

how many people on this forum have bad headgaskets? geez

AdderMk2

sounds like a bad cap and or the wrong water pump

militarymustang88gt

it goes from the radiator into the resivior and then pours out and none gets sucked back in but there is an *** load of air that comes out in the morning when i go to fill it up

PX429

Start with the little stuff. First off, why are you running a 165 Thermostat? Second get a new cap. And cross your fingers that Mattdel is wrong.

militarymustang88gt

well it is the waterpump that is was allways in thier the cap was new as of a month ago and its a 160 thermostat

mattdel

first and foremost, ditch that thermo. your not doing the motor any good running it that cold. i dont care what your buddys tell you. the colder thermostat trick DOES NOT work for EFI.

militarymustang88gt

it was in thier too i have my 351 about halfway done so i aint gonna waste money to change a part out i didnt pay for but i was wondering how air was getting presureised in system and causing the coolant to run out the resivoir

mattdel

think about it logically, if air is entering into a supposedly sealed system, obviously you have a suction leak.