get it really warm, take the cap of the expansion tank and rev it for a few minutes - you need to make sure the stat has opened to be sure all the air is gone, you might notice the level in the expansion tank has dropped when you've done this - then top it up to the correct level
am sure others will have their own way of winding the system, shame gripe water dunt work
am sure others will have their own way of winding the system, shame gripe water dunt work