Hello out there I need to bleed my cooling system on my disco td5.i get all the slacken bleed screw and raise expansion tank but do I run it with the cap removed from the expansion tank to remove air bubbles.do I need to reach running temp.if so do I tighten bleed screw before running I asume the bleed screw would be on its way to the moon if you run it with it slackened. Read the manual on top of advice already recived from landyzone members. Can anyone please advise.