Issues with 2UZ-FE VVTi and leaks in extreme cold?

*cross-posted from 2nd Gen Thread* - I have a GEN 2 Tundra with the 2UZFE-VVTi

Just curious if any fellow 4.7L V8 owners are having issues in the extreme cold? We've been in a deep freeze for more than a week now (-25C [-13F] daytime highs with -35C [-31F] overnight lows without windchill). I just noticed a little puddle of fluid under the truck having not driven it for the past week. I can't tell if it's coming from the valve covers, the power steering fluid pump or lines, or maybe even the cam tower. Stupid me forgot to plug in the block heater, which may have reduced the likelihood of this leak. I'm using Pennzoil Ultra Platinium 5w30 and the truck is at ~430k km (~211k miles). Engine oil levels look fine, and the power steering fluid levels in the reservoir look right.

It's so cold that the brake cleaner I sprayed onto the area still hasn't evaporated. Was hoping to degrease the area to determine where the leak was coming from. Hopefully, it will warm up soon so I can take it to have the leaking area pressure washed.

Thinking maybe I should try a High Mileage Synthetic for my upcoming oil change.

Pictures added: (pictures were taken post spray down of brake cleaner prior to evaporation)
passenger side:
















driver's side

 

Valve Covers or Cam Seals leak?

Try tightening the VC Bolts a bit and see if it stops or slows things. May need new VC Gaskets.

 

Power steering fluid should be pink. If the stain on the ground is not pink, look at the engine.

 

On my Gen 1 (4.7l) I had a leak like that. Was not caused by any extreme cold temps and was told it was a power steering hose. Could be something different but judging by the pics it could be that. Maybe check your power steering fluid level?