ok so this is on my 92 300 l6 f150 i put 2 head gaskets in it and had the head surfaced and pressure tested still blowing air into my coolant... (nothing else is mixing)
so i guess i have a cracked block or block deck issue... shame it all looked nice
anyway i was thinking about putting a tank into the heater core supply with the heater core side lower than the engine side to let teh air rise out
which brings me to my bleeder valve problem rad cap necks are pretty expensive so i was thinking about using a grainger valve mounted in the top to bleed the excess air into the overflow tank
should work right? pretty simple and easy i thought id use a fire extinguisher for a tank
and i know this is pursuing the problem in the wrong direction but its got 150k on it and i think ill make another 75k easy on the thing since it runs pretty well haha plus the whole idc thing at this point