Car is 2004 3.0i petrol. I was towing a trailer with a car on the other day when I noticed the needle rising then coming back down a few times. It did this for about 30 minutes then when I can to stop all the coolant came out and there’s was steam everywhere. Once cooled down I Noticed a 1 cm hole in the side of the expansion tank. Is this a common fault or did another issue cause the expansion tank to blow? It’s currently in the mechanics being looked at which is 6 hrs from where I live..