'02 Mazda 626 LX 2.5L V6. Overheating - need advice - have repair manual so can fix myself

Did you replace the radiator cap? When the cap go's bad it sometimes will do just what you described.

I have 2 caps, 1 on the overflow canister and the other is on the block side of the line running from block (exit) to radiator (enter). Never replaced either but neither have blown seals. No cap directly on radiator.

Hmmmm. Just for grins and giggles try replacing the cap to the over flow tank. It's 12 years old. If you're luck you got off cheap.

Ya huh lol will try that first in 5hrs when o'reileys opens. Thanks

Let me know if that's the answer.

Your whine might be a water pump. If the fins separated from the shaft then they would make all kids of weird noises (or none at all). Start the engine when it’s cold and open the radiator cap on the overflow tank. You should see movement in the fluid coming from the little hose that runs across the fan cowl. Hope this helps!