I recently replaced the front calipers (and rotors) on my 245 GL (I suppose that after 20 years with the same calipers, even with a Volvo you eventually have to change them [insert winking smiley])which of course means I need to bleed the system.
The last time I changed the calipers on a Volvo (long ago on a 79 245 DL) I don't recall whether it had power brakes or not but I'm pretty sure that I didn't have the engine running.
The 245 GL does have power brakes and I'm wondering whether the engine has to be running so that the power assist is "on" in order to bleed the system ?
Logic tells me "no" but sitting in the car and pumping up the pedal makes me wonder because the pedal doesn't seem to get any stiffer even though I've already gone around all of 8(?) of the bleeders screws once.
One thing that I supected might be the cause is that I didn't remove the white nylon hex-headed plug (switch ?) in the octopus-like gizmo (pressure warning valve ?) to which all the brake lines are connected.
So the second question is "Does that white nylon plug have to be removed before bleeding the system ?" (I did disconnect the wire to it, if that matters.)
In any case, thanks in advance for any wisdom (or slaps upside the head) you may have to offer.