I'm just about to do the thermostat mod on my 2002 l322 BMW petrol engine is there a method for bleeding the cooling system after refilling

Thsnks

Here you go from Rave.

Click image to enlarge

Excellent thank you

This might help if you get a problem , mine didn’t bleed easily when I did the mod as my auxiliary pump doesn’t work. I burp the rubber hoses to expel air and raise the front of the vehicle.
This is good info
http://www.meeknet.co.uk/E38/E38_Bleeding_The_Cooling_System.htm

Warning as they can be a real pig to bleed sir

Indeed, there are few threads around the net of people with the M62 engine thinking they have head gasket failure which turns out to be bleeding issues.
i fill the header almost to the brim and keep squeezing the lower and upper rad pipes with the engine running , avoiding chopping your fingers off on the fan of course

When I did the thermostat swap, I followed the RAVE but I poured coolant in really slowly.
It went straight in. Afterwards I could only add really small amount.

I would guess pouring coolant with haste can form air pocket into the system.

Mod done with 740d 88c thermostat bled as per rave instructions been for a drive in sport mod with air con flat out no problems so far fingers crossed

I think the 88 deg stat bleeds easier, i never had any problems bleeding until I fitted the 80 deg mod.