Boxster S 2000 Losing Coolant - Please Help!

[andyh]

Hi Guys & Gals

My 2000 Boxster S is losing coolant, I've just had the offside radiator replaced as it was leaking and was hoping for some problem free driving but after taking it for a spin this morning I noticed that the red warning light was back slowly blinking.

The temp was OK and there's no obvious leak on my driveway but it has lost nearly 2 thirds of the coolant in just a few miles, I'm hoping it might be an air in the system problem but I am no mechanic at all and have no idea what it is.

My mechanic is a local garage and not a porsche specialist so maybe he's missed something when installing the rad but who knows.

Can anyone with some 986 knowledge please help?

Thanks