Hi ,

It’s can happen, it does happen. It happened to me too.

I’m not saying this is the leak cause, but for me it was weeping head gasket, the rubber gasket we all know and love.  When cold outside it leaked more .

You can do your searches on this. Short story is usually corrosion on the mating surface of the aluminum head to rubber gasket results in weeping and leaking of coolant. 

It’s a bit of a subject , but my advice is to research and prepare for heads off repair.

Alistair 

> On Dec 21, 2023, at 10:00 AM, Jamie Auch <jamie@kookymathteacher.com> wrote:
> 
> Dear List,
> I have a 1989 Blue Star with a 2.1. Three nights ago the temps dipped below 30 F. in Western North Carolina. The next morning, I had
> A puddle of coolant in the drivers side rear of the Vanagon. The next night, I was working in the garage and left the BlueStar in the garage. There was no puddle Yesterday.
> Once again, I left the Vanagon outside and found a larger puddle this morning. To my cold weather list members, is this a recurring problem? What should
> I look to do to fix the problem. Thanks.
> Jamie Auch
> The Kooky Math Teacher
> 
> 
> Sent from my iPhone