My wifes astra (M reg 8v petrol) is losing a lot of water.
Garage told her that their was no leaks, as they had pressure tested it. Just keep topping the water up ??
I have to keep topping up half gallon of water every 25 miles.
No water in the oil, as no foam in oil. No water leaks dripping on the floor.
How do I check if gasket blown ?? as the engine is lumpy at tickover, until it gets hot.
TIA