Closed system flush

[Whitaker717]

Hi guys, I am going to attempt replacing my thermostat on my 87 this weekend and need a bit of guidance. I know how to get the housing off and all that fun stuff but basically refilling all the coolant makes me a bit nervous. Does anyone have any tips or videos on how to refill it without getting a bunch of air in it! Also how much coolant does it require? I have recieved a few tips but still have a bit uncertainty doing it. Is there a video anywhere? Thanks guys

[llhat]

recently drained my 89 with closed system by opening petcock on radiator,  then R&R thermostat and housing.

 

I bought a gallon of 'pure' antifreeze,  and used an empty antifreeze jug to make a 50/50 mix.

 

Filled system,  and did 'burp' couple different ways,   I had installed a later version of the thermostat housing with the port for a sensor, which i adapted for a mechanical temperature gage,  it appeared this location was at least the same level as the temp sensor at back of cylinder head, so used it for air venting

 

It appeared I still had about a quart of 50/50 mix left when I was done after circulating, burping, and final fill.

 

[Whitaker717]

Did you fill from the hose off the thermostat housing? How much antifreeze should I get.