2007 Cayman S with 66k miles. Fully dealer serviced, never tracked and used 3-4 times a week.
I put it in the garage just after Christmas then we had a snowy spell (but no more than -2c) so it sat there for 10 days until I went to check on it. Started fine and I let it run for about 5 minutes before I locked it back up again- not ideal but it was still too snowy to drive.
Another 10 days pass, the snow has gone and so I decide to take it for a drive.
Turns over slowly, starts and fires on five cylinders. I let it run for a few minutes, no smoke or noises but can't get it to run on 6 and a CEL shows up.
Locked it up and left it for two days.
2 days later, go to start it and I get loads of white smoke (not steam) CEL and then after a minute the light on the water temp gauge starts flashing. Turned it off and got it recovered to the dealer.
They are saying that it's a head gasket: cyl 2 to be precise.
Can you blow a head gasket when the engine is cold? I've never heard of it before.