This morning was the second time the same ancillary coolant hose burst in my car. It's a 2005 model Opel/Vauxhall Astra turbo coupe (engine is Z20LET). Prior to this, I have had many problems with coolant leaking out of the joint where the pipe connects to the reservoir.
I know exactly how to replace the pipe (unscrew clamps and take off the old one, then attach the new pipe and fasten the clamps), but I was wondering what the cause was and if anyone has had similar problems. I would like to avoid this problem in the future.
My car doesn't run terribly hot, even in slow traffic in summer. The temperature hardly ever goes over 95 to 100 degrees celsius (203 to 212 Fahrenheit). I've also taken care to eliminate air bubbles in the coolant system by idling the car with the radiator cap off when I top up the coolant.
But even then, I suspect that the pressure may be too high in the coolant plumbing. Or else the pipes may have perished, being 8 or 9 years old. I don't think I have a blown gasket, but if you knew my history with the car, I wouldn't even be surprised. Although engine performance is very good and I don't have a rough idle or lumpy acceleration.
Extra info: I had my aircon on a lot the previous day and I have this feeling that I may have had it on a lot the previous time this happened.
UPDATE: some pics of the usual suspects showing no signs of a blown head gasket.