Coolant Recovery issues

[TobyArnot]

Hello all,

I have a question. I installed an overflow bottle under the hood and plumbed the radiator overflow hose into the bottom of the top-vented bottle. I replaced the radiator cap with what I thought was the correct type.

I am losing coolant somehow - no visible signs -, but there doesn't seem to be any flow, either way, between the radiator and the bottle. What am I doing wrong???

Any and all suggestions appreciated.