Condensation in a Boxster

[mhknapp]

I've noticed that I'm starting to get condensation above the oil filler/coolant filler in the rear compartment. Is this a sign of trouble, or just because we have had more humidity than normal.

[Steve Grosekemper]

Sounds like you have a leaking coolant cap.
There is an update for these.
Read the number off the top of the cap, it should be 99610647700
Replace it with a 99610644701

Then poor clean water around the caps to clean the coolant off.
(It will drain in front of the RR tire)
Then dry best possible.

[mhknapp]

Thanks Steve checked, I must have a REALLY old one part number 996.106.447.00.
Guess I'll go down to my local friendly dealer and get a new one. Thanks Again

Mike

[mhknapp]

OK, replaced the coolant tank top, still get trace of condensation on the inside trunk. Thought the coolant tank might have a leak, but can't feel any wet spots in the carpet, even put down some paper towels to see if there is a wet spot. None so far.
Temp gauge normally runs about one needle width above the 180 degree mark.
Any suggestions on what to try next, there are no water spots in the garage when I back out.

[Steve Grosekemper]

If the condensation is only at the trunk lid over the cap you might have a leaking purge valve (take the black cover off to see it (After removing the oil and coolant cap)
If the condensation is in the entire lid then pull all the carpet up, including the wooden floor and look to see if the tank is leaking.

[mhknapp]

Thanks Steve, will give that a try. Becoming a quest to find out why

Mike