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Issue using indoor car cover in humid area

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Old 01-24-2019, 11:05 PM
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SH2
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Default Issue using indoor car cover in humid area

I’ve had my new 991.2 covered in my garage for the last week, during this period we had some snow followed by very high humidity along with some soaking rains. When I went to remove the cover tonight, I immediately noticed how damp it was and found all panels and windows wet. I can only imagine the problems that could’ve delveloped had this been left untouched in storage for a long period of time. Are others covering
their vehicles during the winter months?


Old 01-24-2019, 11:17 PM
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NJ991
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That’s interesting. I live in northern NJ, and we get similar weather as you guys, and I haven’t seen this before. My garage is not heated, or anything, but does have windows, and vented in the ceilings. Before I refinished my garage, and coated the flooring, I did a humidity test on the floor and it was very dry. Regardless of weather conditions, my garage seems to always stay dry. Do you leave the garage door open a lot each day? Maybe with the current changes in temperature, and the exposure may have caused that? Just a guess. Is your garage heated, and could’ve caused some sort of condensation, while it’s wrapped?
Old 01-24-2019, 11:20 PM
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SH2
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Garage is not heated and perhaps doors were left open for a bit longer than normal.
Old 01-24-2019, 11:33 PM
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go.illini
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In my experience most car covers are excellent for trapping moisture. A cold car will condense moisture in the air very effectively.

I don't have a climate controlled garage (but it is insulated) and I 100% do not use a cover. Partially for the reasons discussed but also because I've had the unusual luxury of some clear 50+ degree days here and there to get the car out and enjoy it. I feel like if I had to worry about keeping it clean enough for a cover I wouldn't drive it 5-6 months out of the year.
Old 01-24-2019, 11:57 PM
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NJ991
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I’ll periodcally check mine and update you. It seems we have the same car cover too.
Old 01-25-2019, 07:25 AM
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wareaglescott
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Besides moisture issues I am of the feeling you have a better chance damaging the finish of the car taking the cover on and off than the car just sitting there uncovered vs whatever you are trying to protect it against.
Old 01-25-2019, 07:43 AM
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SH2
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You’re probably correct, the install and removal of a cover creates its own perils.

Last edited by SH2; 01-25-2019 at 08:14 AM.
Old 01-25-2019, 08:43 AM
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Bud Taylor
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I bought my car cover off amazon, their house brand. I live in a place that has very high humidity and these covers work great. Much heavier than an indoor only cover. Unfortunately no cool logo but does the job extremely well. I have several of these and have been using for years.

Amazon Amazon
Old 01-25-2019, 09:02 AM
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CSK 911 C4S
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Since you have a cover...... I would crack both windows to allow moisture to escape and/or place some desiccant bags inside.

I have a dehumidifier in my garage set to 60% and it keeps everything nice and dry.
Old 01-25-2019, 09:37 AM
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Guards_Red_991
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I cover my car too and I live in PA... No issues at all as I remove half of the cover and start it at least once a week. I run the heater and let it idle for at least 45 minutes.
Old 01-25-2019, 09:42 AM
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LexVan
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Originally Posted by Guards_Red_991
No issues at all as I remove half of the cover and start it at least once a week. I run the heater and let it idle for at least 45 minutes.
This is the WORST possible thing you could do to your 911. Amazing. I'd love to see your UOA after winter hibernation. You need to reconsider your winter hibernation routine. In other words, don't start it till spring.
Old 01-25-2019, 10:30 AM
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Originally Posted by LexVan
This is the WORST possible thing you could do to your 911. Amazing. I'd love to see your UOA after winter hibernation. You need to reconsider your winter hibernation routine. In other words, don't start it till spring.
I just purchased a new set of winter wheel and tires as I intend to use my vehicle throughout the winter season, of course, only during clear days. I purchased the cover long before my 991 arrived, thinking it would be stored for the winter and the purchase of a winter set of wheels & tires would wait till next year. Well, as soon I as picked her up last month, I knew the aforementioned winter set upt would be moved up to like..asap. Anyhow, I figured I'd use the cover during those inclement periods when I knew the car would just sit in the garage until roads and weather cleared. It appears the $300 I spent on a cover may have been a bit impetuous, I'm sure this won't be the last time this happens.
Old 01-25-2019, 10:35 AM
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Originally Posted by CCDD
Anyhow, I figured I'd use the cover during those inclement periods when I knew the car would just sit in the garage
Sounds like a good plan, just don't cover a dirty car.
Old 01-25-2019, 12:07 PM
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Guards_Red_991
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Originally Posted by LexVan
This is the WORST possible thing you could do to your 911. Amazing. I'd love to see your UOA after winter hibernation. You need to reconsider your winter hibernation routine. In other words, don't start it till spring.
UOA?
Old 01-25-2019, 12:21 PM
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Originally Posted by Guards_Red_991
UOA?
Used
Oil
Analysis

Idling a car, will cause fuel dilution of the oil. This fuel dilution will be seen on the UOA with a depressed flash point value and greatly reduced high shear/high temp viscosities. Would not surprise me to see a FP of <380 in this specific example. When you really want your FP to be >390. And preferably in the 410-415 range.


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