This is a typical failure mode. Leaks in cold weather, stops when warmed
up, leaks worse as temps drop. May go on this way for years depending on
you and it. Mine has. On more than one van.

Mark

Dave Mcneely wrote:
> So, I've done about everything I thought I should to make my '91 camper
> as reliable as it could be, including lots of cooling system fixes.
> Just replaced all coolant hoses, since so many think that should be
> done.
> .......
>
> Head gaskets are leaking. The question: I find it difficult to think
> the gaskets just all of a sudden turned loose (I'd even removed the tins
> to look for evidence of leaks when I did the hoses, and saw none).
> Could it be that the heads and or gaskets were already loose or
> whatever, and the cold weather made them looser and so they leak? If I
> run the engine a little while, the leaks dry up, suggesting to me that
> temperature plays a role -- expansion, contraction ..... . So, could
> the heads be sealed better even with the temperature difference between
> normal fall temps and the quite cold temps we've had lately? I'm just
> trying to understand why this suddenly showed up, and wonder if it being
> coincident with the cold weather is more than a coincidence.