once it is as full as it can get cold, it should burb air out during the first Heat cycle. after filling run it till hot let it cooldown and do not open the cap it will suck fluid from theover flow that you must keep full. If that goes dry it sucks in air. If filled and the cycled say once. that should do it be sure to check that bottle until its stable.

If it does not suck back fluid then you have a leak. It could be the cap, the hose the goes to the over flow tank. Or worse case its leaking else where. can test for leaks with die or if its gig leak some air would tell.

on mine i have literally ran a hose into the rad undid the upper hose and flushed it with never ending water supply running. like 30 minutes. when i replaced the water with the fuide all did was fill it up as much as i could, filled the over flow to the hot line and ran until it was at temp. shut it off. next day checked over flow was near empty<sucked back in. Filled to the cold line. Rinse and repeat. Do not over heat these. they dont fair well.

 

once it is as full as it can get cold, it should burb air out during the first Heat cycle. after filling run it till hot let it cooldown and do not open the cap it will suck fluid from theover flow that you must keep full. If that goes dry it sucks in air. If filled and the cycled say once. that should do it be sure to check that bottle until its stable.

If it does not suck back fluid then you have a leak. It could be the cap, the hose the goes to the over flow tank. Or worse case its leaking else where. can test for leaks with die or if its gig leak some air would tell.

on mine i have literally ran a hose into the rad undid the upper hose and flushed it with never ending water supply running. like 30 minutes. when i replaced the water with the fuide all did was fill it up as much as i could, filled the over flow to the hot line and ran until it was at temp. shut it off. next day checked over flow was near empty<sucked back in. Filled to the cold line. Rinse and repeat. Do not over heat these. they dont fair well.

222Doc
So you removed the rad cap and the top hose at the rad ran water through the rad and circulated it through the engine and let it run for 30 minutes then filled the rad with antifreeze till it ran out the top hose, then connected the top hose and filled the overflow to MAX and ran the engine till hot and cool down watching the overfill bottle to keep it up to MAX. I'll try that, thanks for the advice.