[decooney]

Ed Cougar,

Thanks for your reply. The additional confirmation is helpful and good to note. Once I started to focus on it while driving in the cool/warm/cool conditions, only then did it start to make sense as to what was really going on. Also, I don't care for the more irratic behavior of the engine when it runs cooler. 20 degrees makes a big difference to me now that I understand what was happening on cooler days... it's even worse and more noticeable with aluminum heads than my previous iron heads for sure!.