?? Condensation in rear trunk ??

[AndyA6]

I just wonder if this is a problem or if I am just paranoid.... After driving I see condensation under the trunklid where the coolant tank is. I don't think the coolant tank leaks, everything is dustdry, except this condensation. Normal? Any insight/advice?

Thanks!

Later,
Andy

[sd_boxster]

Step 1: Remove and reinstall the cap. Tighten the crap out of it.
Step 2: Replace the cap.

There are more solutions available if these two don't work out (search), but mine was solved after Step 1.

[Flavor 987S]

Did you look below the carpet? May need a new coolant tank cap. What is the part number on your cap? Is the cap tight?

[AndyA6]

Thanks for all your replies!

Cap is tight, carpet is dry, no coolant loss, I watch/check these things closely....

Cap part# is 996.106 447.01

Looks like a new cap to me?

[Jaxonalden]

You have an old cap. There have been two versions since then to fix that very same problem. Look at the last two numbers...you have an 01. Look at this one; http://www.****************************************************.com/product/99610644703.html?Category_Code=986Cooling

You need a new one, this one fixed my problem.

[Burg Boxster]

the latest cap version is .04 but generally speaking, the .01 thur .04 designs are very similar. The .00 design was vastly different and very weak (had a rounded inner flange).

If you've already checked under the carpet and barring any other signs of a leak, and if the cap is on tight (the p/n should be a the 6 o'clock position when standing at rear of car) you're in all likely-hood good to go. For the sake of argument though, remove the coolant cap, oil filler cap, and black cover plate below them (it'll pry right up) . Check the coolant tank bleeder valve (a black cap w/ what looks like 1/2 of a binder clip on top) and make sure it's in the down/locked (parallel to the road) position and there isn't any (more than a possible trace) white residue around it. If in doubt, you can have (almost any shop) run a quick pressure test on the cooling system (about 20min).

FWIW, I used to get similar condensation occasionally, depending on climate conditions, w/ my '99 Boxster but never had any issues.

[AndyA6]

AAAAHHHHH I love this forum, thanks so much for your feedback.

I will check as suggested and report back.

Later,
Andy

[AndyA6]

It looks like a problem with the bleeder valve..... too much residue and fairly wet around that area, valve was/is closed.
I checked after a short drive, seems that the valve isn't holding.

Originally Posted by Burg Boxster

the latest cap version is .04 but generally speaking, the .01 thur .04 designs are very similar. The .00 design was vastly different and very weak (had a rounded inner flange).

If you've already checked under the carpet and barring any other signs of a leak, and if the cap is on tight (the p/n should be a the 6 o'clock position when standing at rear of car) you're in all likely-hood good to go. For the sake of argument though, remove the coolant cap, oil filler cap, and black cover plate below them (it'll pry right up) . Check the coolant tank bleeder valve (a black cap w/ what looks like 1/2 of a binder clip on top) and make sure it's in the down/locked (parallel to the road) position and there isn't any (more than a possible trace) white residue around it. If in doubt, you can have (almost any shop) run a quick pressure test on the cooling system (about 20min).

FWIW, I used to get similar condensation occasionally, depending on climate conditions, w/ my '99 Boxster but never had any issues.