Drove my car today in dry weather, although the air was humid. Gas/oil level gauge fogged up quickly.

Welcome to Porsches.

Jason

My method of finding the leaks was in the dark garage, I shined a light and voila leaks appeared. I went ahead checked all around the body and chassis and discovered more and used weather sealant and plugged all the leaks.

OP, when you replaced the nozzles did you seal them?

Could this also be called "my 911 does not leak oil"

From my experience these (faults) go with the driving experience

I have noticed that the clock and speedo gauges never fog up because they both have holes in the glass (knobs) for resetting the speedo and setting the time. If only I have the guts to drill a tiny hole on the other gauges

I took all my gauges apart very carefully and used rainex anti-fog on the inside of the glass. When reassembling I went to a shoe store and asked for 4 small packs of desicants from the shoes they were selling and taped those to the inside bottom of the gauges before everything went together.

I've been fog free for 3+ years.

- Steve

What did you use to plug leaks?

I finally pulled the trigger on these gauges. I shorten a 3mm sheet metal drill bit to give me a 2 mm drilling depth and attached to a Dremel. I drilled a hole on the 3 gauges using the VDO text as a guide at the bottom of the gauge and a few mm past the rubber gaskets.

Worked like a charm. Give it a try, you won't be disappointed

I have my air box, brake master cylinder and other bits removed, and I am dealing with windshield squirter repair. I am noticing what others have reported, which is that the windshield squirter system can leak. Mine does. If so, it leaks into the perfect place to provide unwanted humidity to the gauges.

In my view, one could attempt to address the problem by trying to seal, or vent, the gauges. Alternatively, one might find the source of water/humidity and address that instead.

Think about the physics. Moisture is condensing on the inside, so the outside surface is cooler than the inside. Otherwise the condensation would be on the outside of the gauges. I wonder how much heat the gauges produce in operation, with and without the interior lighting on.....

The temperature of the gauges at start-up should be the same as other stuff in the cabin or, if there is a difference, the trunk. After startup, I would expect the gauges to become more warm, reducing condensation. I continue to think this is less complex than many are thinking. I have driven cars with seals that allow moisture into the cabin. VERY troubling. Windows get fogged, leather surfaces get tacky.... With foggy gauges, I suspect the problem is water intrusion. Water is getting some where it shouldn't. The trunk, specifically. Seals can leak and, as I am reporting, there is a source of water right above your gauges. Windshield washer system parts and tube joints. Stop water from getting into this area and the gauges will stop fogging. Theoretically.

BTW, as you can see, I have been here a while. I've heard of, and experienced, the dreaded foggy instrument problem. What I also notice is that most cars have no problem with this whatsoever. It is not the gauges' fault. Water is getting in.

Yep, just did this the other day. Works great.

Yup, my '75 does it as well.

Keep thinking that you have a water leak and you would sit with this problem for years.

I never drive my car in the rain and my car is always parked in a garage.

I took out all my gauges and used a sheet of thermal fibre to keep out the cold air. I keep my car cover in the trunk packed up against the windscreen. I also got a company to make me 3 bags of 250g silica gel that I placed behind the gauges. I even replaced the candles with CarMagic's led bulbs, None of this helped.

To each their own. Some people can't use good advice

Moisture laden warm air will eventually get into your gauges, then it is there for a long time since the air transfer in or out of the guages is slow. When the car cools down the warm air cannot hold the moisture and it condenses on the cold glass. Drilling a hole in the back of the guage makes sense, like opening the window in the shower.

Rahl

While a cool idea.... and I admire your initiative.... It seems like a lot of work to wrap the offending gauges in a heating blanket..... I'm not sure I would go that far. I'm an engineer and I love a challenge but this seems over the top.

Temp guage fogging
 

Hi, I noticed my temperature gauge fogs when the car is idling and stationary.

Any ideas ?

Mine do fog up, they clear up faster too.

You must not have AC in your car. I virtually never see fogging at all, and when it happens it is minor, and goes away when driving.

The AC must suck the moisture out of the car, and the gauges.

Many say you can pull apart. I’m not one of those. The shops that do this work have the special tool that allows them to remove the bezel and reinstall so when done, the gauge still looks factory new and not all mangled

They all fog up. Mine always have. I have read that if you get the inside of the glass cleaned up, they will fog less.

I wouldn’t bother possibly ruining you gauges just to dry them. They will dry on their own