Blue/green deposits and drips from exhaust

[Split_Pin]

My 1.8 Astra Coupe is on SORN just now, in my warm dry integral garage.

 

I run the engine up to temp every month or 2 but the last few times I noticed that the exhaust had drips of bluey green water coming from it, which formed into a sort of dried deposits around the tailpipe.

 

It definitely isn't coolant as that's the pink stuff, which has a definite colour as I changed it in January.

 

So far nobody has been able to answer this and Google says no.

 

Anyone know what the heck this is?

[brickwall]

Any smell of coolant? Check you arent losing coolant.

[STUNO]

Probably really needs an "Italian tune up" as the exhaust is not really getting hot enough. ANPR can not tell the difference between an Astra plate and a Range Rover one at 3am !

[autofive]

its not an auto is it?

[Split_Pin]

No its a manual and as said the coolant is pink not blue.

 

Not going to risk going out in it as at 3am that's exactly when the cops will be on the lookout for dodgy motors. It isnt taxed, MOT'd or insured.

[londonm]

You'll be fine, just don't drive too fast. Keep it under 20mph.

[Pillock]

In first gear.

 

It will be condensation buildup but it's an odd colour for sure. Perhaps the expensive stuff in the catalytic converter can taint the water, if so I would definitely try to get it up to temp as all the metal in there isn't going to like being sat damp.