Yeah, going from the top down and getting a gravity assist makes sense, too. I had just never really thought about it. I have been checking everything over really good lately on the Runner. My 8 year old daughter and I are planning to drive from Alabama to Colorado/Utah to see the country, camp everywhere, and visit some friends and family. Lots of driving; be gone about 4 weeks. Every little noise, perceived anomaly, etc. with the truck is something to be looked into. I have changed transmission fluid, gone to synthetic oil, flushed the radiator, and so on. I was pleased to see that the radiator was spotless inside. Thanks for the answer; one less thing to worry about.
Oh, I forgot
'Round the bowl and down the...
roll tide roll!