When bleeding brakes (new system), do I need to do anything with this hold-off valve?

I've opened it up all the way to bleed the rears. Do I leave it open, close it 1/2 way or close it completely to bleed the fronts?

I'm constantly getting air out the fronts only. Going to bench bleed the MC again (on the car) and try gravity bleeding.

Kind of running out of options on the fronts as I have gone through gallons of brake fluid and keep getting air!

Oh yeah, SSBC disc brakes with new power booster and MC. Original 10" drums out back...

Thanks

Last edited by Mopar_Beach; 04/07/11 03:17 PM.