First of please excuse my very limited engine knowledge!
I have an 04 Vectra C 2.2 SRI Direct - manual/petrol - 85,000 miles
Got it serviced just before xmas and today when I went to drive it - I noticed it was a bit sluggish. Also the heater would not give out any hot air. Warning light came on indicating that the coolant level was low - temp gauge also went up to just below the red after driving about 6 miles - as I was just round from the garage that serviced it, I took it round there - they filled up the coolant and asked me to drive it for a few miles & take it back - during this drive the temp gauge stayed just above the "normal" - when i took it back about 10 mins later - I watched as the mechanic opened the coolant overflow bottle and all teh coolant came spewing out the overflow thing - kinda like a volcano..
He immediately said to me cylinder head gasket is away and will cost £1,000 to fix.
Does all this seem correct diagnosis - looks quite claer to me and is the price about right? The garage I took it to is just a small independent one
Any help would be appreciated