ok guys i need some help here i have a 1993 pontiac trans am with an lt1 here is my problem the cooling fan kicks on at 230 and the gauge reads just before the red 260 and i never hade this problem before the system is bled radiator is new thermostat is new and i also took a heat gun to the sensor points and i believe they are reading accurate so what could this be pluged block bad water pump i guess you could say the coolant dont look like it flows but i dont know how does a water pump go bad other than seal does the clearance problem actually happen? and the fans kick on and cool it off a lil then shutt off how can the pump sensor and head sensor read different?

 

Did you just do a bunch of work on the car and if so what was it? Do you know how to properly bleed the system on the lt1?

 

im not sure if I am bleeding the cooling system properly ive burped all the screw vent holes and ran it for a while with the radiator cap funnel but it still seems to boil over its a mess ive replaced both sensors thermostat radiator flushed heater core replaced water pump I just don't understand and if I let it set with cap on it eventually when fans kick on the low coolant light comes on but when I let it cool off to take cap off the coolant is at the top ive replace the thermostat 2 times due to a superseding part number but still im stomped