I have a 2005 Honda BF8D which is leaking cooling water through the flush port. The flush port is part of the thermostat housing on the engine block and I'm getting a steady stream of hot water flowing out of the port when the engine is running. I've blanked off the port with an M8 stainless steel bolt & fibre washer for now so that I can use the engine. The schematic diagram shows a flush port check valve held against a gasket by a spring inside the housing, which I assume is supposed to close off this port when the cooling system is pressurised by the water pump when the engine is running.
I can think of two reasons for the leak- either that the valve has corroded/ got jammed by grit or alternatively that using the flush port has somehow moved the check valve out of place (into the thermostat housing perhaps). Does anyone know if the water pressure from flushing with a normal garden hose could force the valve out of place and if so would this block/jam the thermostat? Or can I just leave my blanking plug in the flush port and relax??
Grateful for any advice....
I can think of two reasons for the leak- either that the valve has corroded/ got jammed by grit or alternatively that using the flush port has somehow moved the check valve out of place (into the thermostat housing perhaps). Does anyone know if the water pressure from flushing with a normal garden hose could force the valve out of place and if so would this block/jam the thermostat? Or can I just leave my blanking plug in the flush port and relax??
Grateful for any advice....