I take a different approach to bleeding the cooling system. Rather than allow the car to heat and build pressure before opening the bleeder, I bleed the system cold using compressed air. I open the bleeder and use an air gun and a rag to put as much pressure into the system I can through the coolant bottle. When I did the A4, the upper hose blew off with a bang, creating a fountain of coolant that hit both me and GBW, and spattered coolant everywhere.

Live and learn.

4Driver4

"Never give up the throttle until the bitter end." -RC

1990 Coupe Q
1999 A6 Sedan Q 2.8
2000 A4 Avant Q 2.8
1995 Mazda Miata: the anti-Audi
1999 Chevy Suburban: the anti-earth :-(
1990 Nissan Pickup: Snow plow/garbage hauler