Guys I swear Im about to sell this thing! Random misfire code came back. It has new plugs wires coilpacks and icm. all fuel injectors clicking. But back to the pressure issue: Ok i did the 1st suggestion...although the ac doesnt engage, there was bubbling from bone chilling cold to normal op temp. didnt over heat either. But there was idk if youd call it smoke or steam coming thru too. My finace has a 01 impala with the same engine. After it heats up to norm the hoses are not nearly as tight as mine. Will get to autozone and get a compression test thingy soon as I find a way up there.Does anyone know the proper way to bleed these systems? I'd like to compare and make sure im doin it right.
on the 3800 there is a bleeder on the termo housing, you leave that open till the coolant starts coming out, close it then fill the rest of the way. start the car and run it for a while with the cap off preferably with the front up at a slight angle. after it heats up and the thermo is open top it up and put the cap on
either way, engine cold or warm, open the bleeder, fill slowly till it comes out the bleeder, close bleeder, top off slowly, start engine, keep topping off as thermostat opens, when up to 200ish install cap bring the overflow to the line and drive to make sure nothing is wrong
Im having to use the relief valve everytime I stop somewhere to get all that air steam stuff out. It just keeps comming occasional squirt of coolant. i do this both with engine on and off but mostly off. exahust smells normal