I don't see a replaced t-stat on your list. With all that work you did (impressive BTW), a t-stat should be a replaced. There's a few threads that mention drilling a few small holes into the t-stat to allow extra coolant past it. I would look there first.
Quote:
Originally Posted by oldsinner111
I refill with Sierra antifreeze at 100%.No water,your good to go for ten years or 500,000 miles.
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Why no water? H20 has 2x the heat capacity of 100% antifreeze (ethylene glycol).