"Sweating" around coolant/oil caps

[stateofidleness]

Gents,
Is this normal? Only started to be noticeable once the weather got kind of cold. Oil cap was recently replaced with newest revision about 2 weeks ago. Both caps make a good seal (according to "feel"). I can't tell what the "sweat" is, but seems like condensation (water).

Anything to be worried about?

[san rensho]

Pressure test the coolant cap first, if its not that, check for coolant in the trunk under the carpet which is a sure sign of a leaking tank, mine had condensation on it when the coolant tank sprang a leak.

[Flavor 987S]

Does not look "right". Rensho gave you good advice above.

[Flavor 987S]

You should order a new coolant cap soon, too. The newest part number should end in at least an xxxxxx04. Yours looks like an xxxxxx02.

[stateofidleness]

Originally Posted by san rensho

Pressure test the coolant cap first

How would I do this?

note: Coolant tank is about 2 years old (installed by be dealer)

[san rensho]

Any mechanic should have a pressure tester. First, be sure the cap is on tight. Yours looks like it could use anothe 1/8 turn.

[derfo]

Does the underside of your boot lid (rear trunk) where the caps are have condensation on it? Mine does Im in the UK, and especially in cold weather, What happens is, the heat from both caps, when it hits the trunk lid in cold weather especially, will condensate right away and drip down. Mine is like that most of the time here. I have had my car nearly two years no loss of coolant at all. I just keep mopping the condensation up.

[sb01box]

I think the plate just below the two caps can be lifted up to expose the coolant pressure relief value. the valve may have hickuped or can no longer hold pressure.

[srad34]

Originally Posted by derfo

Does the underside of your boot lid (rear trunk) where the caps are have condensation on it? Mine does Im in the UK, and especially in cold weather, What happens is, the heat from both caps, when it hits the trunk lid in cold weather especially, will condensate right away and drip down. Mine is like that most of the time here. I have had my car nearly two years no loss of coolant at all. I just keep mopping the condensation up.

This^^^. It just looks like its sweating. heat and moisture and not able to breath = condensation. Job done. (Incidentally mine in the UK is also the same)