So im trying to button this baby up, 87 irocz. I think i have every thing together, i just have to bleed the air out of the radiator? So the other day, i hooked up the funnel to the radiator filled it and ran the engine. I was expecting the fans to kick on and the themostat to open and suck down the antifreeze in the funnel, the fans never came on and the antifreeze never sucked down. I beleive it was starting to over heat so i shut it off and all the antifreeze spilled up and out of the funnel. And I dont think i got antifreeze into my upper radiator hose.
I just bought another thermostat and put that in but didt have time to run it yet. Im hoping maybe it didnt open and so it never sucked down the coolant? I also bench tested the fans and they work, so im thinking it might be a relay, but which one is my fan relay? i replaced the fuel pump relay and another one that was next to it and was the same size. Then there is one smaller one which i thought was the fan relay but now i think it might be the a/c?
Im gonna have to run it again and see if i can get the air out and the upper hose filled this time. And maybe get a new fan coolant temp sensor.

 

You don't "bleed" the radiator, you just top it up when it gets low. The coolant flow starts at the bottom radiator hose, through the block, out the thermostat/upper radiator hose, and back into the top of the radiator. That's why there's nothing to bleed, there's nowhere to form a "trapped" air pocket. If the initial air in the upper radiator hose bothers you, squeeze it a few times closer to the water neck while you're filling the radiator and burp the air out.

 

ok, then i would just need to figure out why the fans didnt kick on, hope fully the smaller relay is the fans because i have a new one of those to put in. That would make all 3 of those under the hood in the corner new.

 

the stock sender doesnt turn the fans on until about 220 or so