I checked the coolant in the radiator for oil residue floating on
top and found none. The radiator was completely full with no air. I
removed a plug from each rotor and turned the engine over looking for water
coming out of the plug holes…nothing. It appears to me that the o-rings
are not failed and the high coolant pressure is not coming from a leak from the
combustion chambers.
I have located a borescope and I plan to inspect the inside of the
radiator tank on the inlet side. I also plan to remove the water pump and
inspect as far inside the coolant passages as I can see looking for an
obstruction.
Do I need to replace the gasket on the water pump when I reinstall
it? Do I need to use any sealant? What say ye who have
removed/replaced water pumps?
If the o-rings are ok and if I don’t find an obstruction, any other
ideas as to the cause of the high water pressure??
What about any suggested tests???
Bill B