Slow hillclimbs = overheating
 

I'm not sure if running with the needle touching the right side of the 0 in 180 qualifies as overheating, but I've noticed whenever I'm climbing a long hill and I'm moving around 30mph or slower the needle moves there pretty quick. Normal? If its paved and I can maintain around 40-45 mph or higher the needle stays right were it normally is.

I wouldn't be too concerned with it; I've found this to be true on a lot of cars at slower speeds. Check your thermostat to make sure it's not faulty - that'll give you some insight if an issue does exist. In case it is faulty, I've attached a link to a DIY for replacing it. Best of luck!

Porsche Cayenne Thermostat Replacement | 2003-2008 | Pelican Parts DIY Maintenance Article


-Dmitry

I see mine climb as well, I already did the cooling tubes fix and my cooling tank. The cooling tanks tend to leak and that will drop your fluid level over time, you should be able to smell it. I don't believe the 08's had the cooling tube issues. I often tow my jeep as well and it rises and cools down once the fans kick in. I also bled the air out of the system and it helped. I heard my year Cayenne's also suffered from pre-mature water pumps and thermostats, I have not seen that yet but I'm looking for the signs.

Thanks for the info!