Are you sure the water pump is moving water?
> Well, I think I am going to have to do something major.
>
> I just switched out the sender, and the new one reads the same. So, the
> Thermostat and sender were not the problem.
>
> So, I ran then engine more, until it was fully warmed up. "Hotted up"
> might
> be a better description
>
> I then shut down the engine so I could feel the radiator without
> amputating my
> hand, and I found that it was entirely COOL except for the very top!
>
> I let it sit a couple of minutes to heat up and convect, and it was still
> COOL over its entire surface.
>
> So, as far as I can tell, the radiator is not flowing much at all.
>
> I think that even with CONVECTION, the radiator would heat up some, so it
> seems like it is a significant plug. I will have to drain the radiator
> soon,
> as soon as I have time.
>
> I will remove the lower radiator hose and let it run out and then rinse it
> with a hose from the top and see what happens. I will then run the engine
> some and then let hot (not scalding) water pour out the block drain, and
> then
> do it again.
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