Just fitted a nice new Sifab aluminium radiator to my Roadster and all went well on the fitting. When I came to filling it with 50% water 50% Ford premium antifreeze I stupidly poured in the 6 litres of new antifreeze first to be followed by the 5 litres of water for the 11 litre total volume of the engine. On pouring in the 6th litre of antifreeze it became apparent that the coolant was full. I had obviously not managed to get all the water out of the block and heater presumably as the thermostat had not opened. I should have realised this as the volume in the bucket of old coolant measures about 6 litres.
I ran the engine up to temperature and the thermostat opened and the fan also came on so all ok. There were a few air bubbles to come out.
I now have an engine with 6 litres of new antifreeze and 5 litres of probably old 2 litres anti freeze and 3 litres water. (I had topped up a bit with water). If my maths is correct this adds up to a 73% antifreeze level rather than the recommended 50%.
What should I do? Leave it as it is or drain a bit off and top up with water to get a 50% mixture. The maths might get a bit more difficult!!
Does over strength anti freeze affect cooling or attack the engine?
