Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing Coolant system flush and antifreeze change.

Not when my final fill is using the concentrate I specifically purchased for the job Deejay



The pre-mix was left over from another job, so as it was effectively free to me, I extravagantly used it for the last flush

I appreciate Prestone say their coolant is compatible with all other colours/types of coolant, but I wanted to be 100% sure all the old red [and likely tap water] was completely removed. So, after getting the rad running with clear and pure de-ironised water I just ran the 4 litres of pre-mix through that I had left over from the Elan job for good measure.

Here's what came out from that last luxury flush



Rest assured the final fill ratio has been carefully calculated, actually it's comically easy to calculate because the concentrate comes in a 4 litre jug. The truth is doing the last luxury flush with pre-mix just means there will have been some pre-mix left in the line and at the very bottom of the rad, the drain plug on my Mulfab aluminum rad is horizontal.

In summary, Monty is now running closer to 55% Prestone concentrate and 45% pure de-ironised water, it's the most accurate way I could fully ensure a completely safe mix of the two new elements.

And nothing else from the past

I'm confident what's in there now is just the following:

1. New Prestone coolant

2. Fresh de-irionised water

I'm happy with that