Water system bleeding
I recently drained mine out to replace the coolant with fresh stuff. I just took the bottom hose off to drain it, refitted it and filled the engine again with the turbo water hose. Fill it nice and slow with an funnel stuck in the hose and it'll bleed itself 
I had no issues at all with trapped air by using this method.
I had no issues at all with trapped air by using this method.
This is the procedure that I found when I first bought my car, so have followed it without issue.
Full refill takes 7.2litres for classic
premix 50/50 antifreeze and water in a separate container - I use 2ltr pop bottles
Now the important bit.....
undo the header cap and remove the straight pipe that goes from header tank to rear of engine (just to the side of the turbo)
Very slowly fill via this pipe until coolant mix is seen rising in the header tank (about 5-6 litres worth depending on how much water you drained out in the first place.
refit pipe & jubilee clip but NOT the header tank cap
Start engine, interior heater switched on, fans on and set to hot.
Allow engine to warm up, squeezing the bottom radiator hose gently as you go - you will see air bubbles appear in the header tank coolant.
Add more coolant mix as the header tank empties.
once it will take no more, fill the expansion tank (by n/s headlight) to the correct level.
fit caps to header tank and expansion tank.
At this point I wait until the cooling fans have kicked in and then gone off again.
take car for a steady drive. not too far from home incase of leaks or problems
return home and let engine coolant cool down.
once cool enough, undo header tank cap and fill up to the top if required)
cap on and jobs a gud 'un
premix 50/50 antifreeze and water in a separate container - I use 2ltr pop bottles
Now the important bit.....
undo the header cap and remove the straight pipe that goes from header tank to rear of engine (just to the side of the turbo)
Very slowly fill via this pipe until coolant mix is seen rising in the header tank (about 5-6 litres worth depending on how much water you drained out in the first place.
refit pipe & jubilee clip but NOT the header tank cap
Start engine, interior heater switched on, fans on and set to hot.
Allow engine to warm up, squeezing the bottom radiator hose gently as you go - you will see air bubbles appear in the header tank coolant.
Add more coolant mix as the header tank empties.
once it will take no more, fill the expansion tank (by n/s headlight) to the correct level.
fit caps to header tank and expansion tank.
At this point I wait until the cooling fans have kicked in and then gone off again.
take car for a steady drive. not too far from home incase of leaks or problems
return home and let engine coolant cool down.
once cool enough, undo header tank cap and fill up to the top if required)
cap on and jobs a gud 'un
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