Thats you're problem. It's not bleeding. Mine wasn't when i first installed it and found the little brass fitting that goes into the stock exchanger not to be tight enough and had a micro leak. i tightened it up as the car was running and bang watched the coolant flow to the tank. Check all you're fittings

 

It did drain the tank once....right now it is still going down a little bit....maybe i reversed the in/out is not bleeding as fast.....i marked the tank this moring and it was lower when I got to work so I know it is bleeding some just doesn't seem to be very fast.

 

Coolant has to be flowing through that bleeder hose up to you're tank in order for the option b to do it's job. If coolant isn't flowing, it's not self bleeding.

 

How important is that little black insert?

 

You need it for the option b to properly do it's job

 

I'll have to look around, cause I don't remember seeing one in the kit or installing it....
So because that insert isn't installed, too much fluid is going strait to the surge tank and not enough threw the heat exchangers that its causing the cooling effect to suffer?

Edit: I found it and installed it. Who knew that something that small would hold it back from working properly...

 

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