87 Turbo II- I was putting the manifold back on and noticed the BAC valve has 3 coolant lines? the normal two that come off each side for the coolant but I think theres another that comes off the top in an elbow shape? I forget where it went...it might have been blocked off...Im not sure, someone help me out.

Thanks,
Ryan

 

The elbow is supply air for the bac. The water I believe is for cold weather. Sort of an anti-icing device. I think that's the only reason the water supply for the water thermo device is attached to the bac. That's not written anywhere that I know of though.

 

Thats not what I ment, there is an elbow on top of the BAC that looks like it is for coolant in addition to the other two (coming off each side of the BAC) the air supply elbow comes off the bottom. I know where the two coolant lines going to the side fo the BAC valve go, Im not sure about the third one comming off of the top side of the BAC.

 

Nope, there are only 2 coolant lines running to the BAC, and those lines do NOTHING for the BAC. In fact, that coolant section of the BAC can be completely bypassed.