[Roscoe]

OK,
we did a leakdown test on the cooling system and only a slight lb per minute drop.

We did a pressure test and, when running, we developed no significant pressure (1 lb) with no fluctuation on revs.

We did a dye test for emission gasses in the coolant. Negative

Now we noticed that the radiator (Griffin) is cool on the bottom half, although the hose running back to the pump is hot.
Could it be a clogged radiator????

Roscoe