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[ChocolateMonster]

Fair enough - looks about right to me. Right engine, specification and year. So should be about right!!

But how do you know that only 4 litres of the 7.9 actually drain out? Is this based on experience/knowledge of the capacity of the radiator?

Also - do you have any thoughts on whether the header tank should be removed, flushed out and refitted as part of the flushing process?

[Entwood]

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But how do you know that only 4 litres of the 7.9 actually drain out? Is this based on experience/knowledge of the capacity of the radiator?

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I am NOT saying this ... god knows how much drains out . ...!! but as long as it's more than 4 litres who cares ?? drain it flush it drain it until clear, drain for the last time .. add 4 litres of antifreeze, top up with water until full .. you now have 4 ltres of anti freeze in a 7.9 ltr system .. = nearly 50/50 !!



Headertank will empty and refill every time you drain ..so will be flushed along with the rest of the system.

Personally I run the engine with the heater on full hot for at least 30 minutes every fill, really runs the water around the system

[ChocolateMonster]

  Oh yeah - sorry, being a prat!! I hadn't mentally latched onto the "top it up with water" bit!!

Thanks for the help on this.

I think I am pretty clear on it all now, and I'll let you know how I get on!!

Once again, many thanks for all the help, and sorry for being thick....