Radiator fluid

[peterg]

Got down to look at the 403 yesterday, after the incident coming back from the BOC BBQ, when the thermostat flew off the scale.

The radiator took about 2.5 liters of coolant. When the level came up I could see a waxy material in the coolant. Could this be Bars leak seal or the dreaded oil in the coolant?

Sitting around on idle the temperature sat at about 80 degrees, but it was much cooler yesterday and I the heater matrix was opened fully too, to reduce the possibility of air locks