I also took the opportunity offered by the significant idling time to fine tune my short term trims under the warm up phase, largely using IAT correction.
Today I'm flushing the system with more de-ironised water to completely remove all traces of the Prestone flush chemical, and the last of the old red coolant, when the rad drains with clear de-ironised water I'll make up my 50/50 mix of Prestone concentrate anti-freeze and de-irionised water.
Once filled with my fresh anti-freeze mix and I've fully bled the system, it's job done for the next 10 years
Thing is…Sewin said he only managed to get about 4 3/4 litres of coolant mix back in. So that is on top of the approx 5 litres of distilled water sitting in the engine. So the overall dilution rate is now approaching 25% rather than 50%. Guess it would be wise to get the actual concentration scientifically measured after running for a while for peace of mind?
