10 days ago, I bought a 60-plate VX Corsa 1.2 85bhp petrol 5-door for my wife, it's a Network Q job. Done 14,000 miles, was serviced 1000 miles and 2 months before we bought it.

When we got the car home and I had a good furtle under the bonnet, the coolant level seemed a bit low, it was a couple of inches under the marking on the header tank.

Since then, I’ve added a total of 750ml of coolant (in two lots, a few days apart) but the level still seems to be dropping.

The coolant is still bright pink, no oily traces in it and no petrol / oil smell; there's no trace of mayonnaise under the oil cap or on the dipstick either. No obvious signs of leaks from any of the hoses & connections, bottom of the radiator is dry.

The car does sometimes make an audible 'sloshing' noise from behind the dash about 5 seconds after you start it from cold, it only sloshes for a second or two.

So my questions are: could it be an air bubble / air lock somewhere that’s working its way out? In which case, should I top up one more time and monitor the level?

Or should I go the warranty route with the dealer immediately?

Any pointers welcome -- unfortunately the dealer we bought it from is 120 miles away so I'd like to get as much info as I can before I go back to them and start talking courtesy cars etc.

Thanks, Craig

Edited by craig-pd130 on 11/01/2012 at 09:25