Well, had another trip over the Sierras the other day. It was raining & the carboard got all soggy & started falling apart, so I had to pull it off. Worst part was the engine overheating real bad (252 degrees at one point). When I got to Sacramento, I checked the radiator fluid level & ended up adding over a gallon and a half. No more overheating problems after that. DUH!!!
I did take one picture before it all went to pot, though....