ROSHX7

I took off the coolant flow lines that go through my BAC Valve when the car was fully HOT and nothing came out, no coolant whatsoever! I did this to confirm that there is NO coolant running through this passage way. The BAC passage way is NOT plugged up at all. My coolant is totally topped off and I'm running cool. Is something else plugged up? What can I check? Where does this coolant flow from and where does it go to?

TonyTurboII

Sounds like the line is plugged up.

Chris Ng

if you look at the bottom outlet on the waterpump (The one that connects to the lower rad hose) you'll notice that there is a smaller nipple there.. that's where the coolant hose for the BAC runs from.. it then goes to a nipple on top of your throttle body, then returns thru the engine from a nipple under the intake manifold.. they might have blocked off the outlet...

So long as you no longer have the thermowax installed on your throttle body, you can run without it.. if you still have the thermowax, then without the coolant you'll experience high idle all the time.. not to mention your secondary plates won't open up resulting in good boost but low power..

TonyTurboII

Hm, I thought mine went somewhere behind the filler neck...

Chris Ng

you're absolutely right.. I was mistaken.. the nipple on the lower outlet flows coolant to the turbo.. the BAC coolant outlet is on a nipple behind the coolant fill neck .. sorry for leading your astray..

ROSHX7

Thanks for the help guys, I'm going to do some investigation on this. Funny thing is, I took the coolant line that goes from the BAC to the Throttle Body nipple and blew into it. It was an air tight seal, but then I opened up my Rad Cap. I was able to blow coolant right out of my filler neck. This was done with the engine bone cold. I was just wondering if this means that my thermostat is not fully closed? Isn't suppose to be fully closed when the engine is cold? Cause I shouldn't be able to blow past the thermostat into the filler neck area, should I?