Happy New Year All.
I have just acquired a 2001 Discovery, and trying to learn the quirks of this vehicle. I had to replace an upper radiator hose, I refilled the coolant reservoir, no heat, before I replace the Thermostat, does the system need bled, if so how?

 

Yes. Download rave.
Raise and open reservoir, cold engine, truck on incline helps, open bleed screw, bubbles out

Repeat

 

To clarify -

The RAVE is the service manual. Available here but called the Workshop Manual on that website.

 

Thanks for the information and the link to the RAVE.
Tried bleeding it last night but still no heat so i will order a thermostat today, dont know what else it could be.

 

when you bleed it raise the recovery tank 6-8 inches keep it filled, and do not close the bleeder at the first sign of coolant leave it open for a minute or two

 

couple of other possibilities;
clogged heater core
poor circulation from partially gummed up radiator


do you hear a trickle/waterfall sound from the heater core? air

 

Thanks for all the input, changed the thermostat and all well.