Bleeding cooling system without running car

[4WayDiablo]

Is there a way to do it? I've got to take my matrix hoses off at the weekend to fit my gti6 manifold and to put the gti6 ones on but problem is, there will only be a manifold on there and no exhaust so I can't really start the car. Is there a way I can bleed the system without having to start the car?
Cheers

As stupid as it sounds brim the header tank, cover the overflow pipe with a finger and blow into the filler hole as hard as you can making sure you get a good seal, while you (or someone helpful) unscrew the bleed nipples to let the excess air out, I know it sounds daft but it works as you are pressurizing the system in effect

i use this method does the job