Just installed my option b and it appears to be running backwards....
The system is burping air out of the 3/4" pipe at the bottom of the coolant tank and sucking air out of the 1/4" bleeder pipe at the top of the tank. I have the bleeder hooked up to the top of the h/e.
Any ideas what I did wrong?

 

It's fine.

It will expel the air in the tank like that for a bit until the system is purged of all air.

 

How would that work? The 1/4" pipe connects to the top of the coolant tank, where there is no fluid, just air. It keeps sucking air into the system.

I even disconnected the 1/4" pipe and had it going into a cup of water, sucked all the water out and the coolant tank filled up. Confirming that it is sucking rather than expelling the air in the system.

If I plug the 1/4" pipe with my thumb for about 2-5 min and then release it, the coolant tank burps and fills up... For 30 seconds then drops back down to normal

 

You cant install Opt. B backwards.

It's a 3/4" line from the T connection to the expansion tank, and a 1/4" line with 0.040" orifice inserted from the top of the stock H.E. to the expansion tank.

There is nothing you can mess up, unless you didnt install the 0.040" orifice in the bleed line.

 

I have the orifice installed, I just find it weird that it is sucking air from the coolant bottle through the 1/4" pipe. To me that would mean there will always be air in the system

 

I too have installed option b no dual pass and mine is filling tank and running back to he from 1/4 line... Anyone got any suggestions i have the orifice installed in line closest to fitting on he and hoses ran 100% opinions?

 

Well just to touch back i figured it out i ran all my hoses a different layout now its from pump to he, he to inlet of mani there to t at outlet of mani and t to inlet of pump. This way was listed on a random site after searching a lot and i know some people probably run it different but these were gm instructions from a dual pass kit i can link it if anyone cares. If anyone has questions feel free to ask.

 

Crate engine depot contains the instructions in pdf format for dual pass and option b installation.