did you check the oil? if the headgasket is on its way out, perhaps he is putting neat water in it to save the cost of keep filling it up with antifreeze?
Riiight, £15 for 5L of Vauxhalls own anti-freeze that technically lasts 5 years, but i now replace once a year.
Whats £15 a year, compared to a £500 garage bill for a new head gasket, f**ing muppets!!!
yeah but i mean if the headgasket is on its way out, i.e. loosing coolant in the oil, perhaps the dealer is just putting neat water in to save the waste of anti-freeze!
If its on the way out....then replace the gasket.
You have to wonder why its failed...
The 2.0/2.2s need regular changes of coolant, like i found out with my dads 2.2, that had been 'Main Dealer serviced' all of its life.... at 90k HG went.
Biggest cause is old anti-freeze, i suspect the garage never flushed it, just kept it 'topped-up'
hence i change the anti-freeze in both mine and my dads once a year now.