I also was wondering about warming-up-time and made a measuring a time ago;
http://d24t.com/showthread.php?444-T...=3434#post3434
I also read the method of bleeding air and i agree, the best is to take of the small hose to the coldstart thermostat on the dieselpump.
I made several repairs to the cooling and heatingsystem and copied a trick from DAF; i made a line from that hose to the expansiontank, just like the little bleedinghose fram radiator>>expansiontank.
http://www.volvo700vereniging.nl/node/39065
The explanation is in dutch but it's easy to understand, the T- joint is soldered myself and also equiped with a electronic sensor to resd the actual temp.
maybe it's helpfull?
Maybe it is helpfull.