Coolant system capacity 4.0L

[5yearstobuyatvr]

Im off to the BNG in the morning and looking forward to it! However on return my annual service is due, and i supply free issue to my mechanic,antifreeze etc. I intend to mix coolant to give around -20c protection, but need to know capacity of system,any offers or advice please?

[Ozstyle]

Everthing I read says 12 litres,
thing is it can be difficult to fully drain the system,when I changed mine got about 9 or so litres in (Griff 500 with expansion tank).

[GreenV8S]

Couple of gallons, roughly. Don't think you need to know more accurately than that. 20% is quite weak though, unless you have huge overheating problems I'd go to 30% or more. The anti-freeze effect isn't what's important, you hardly need any anti-freeze at all to prevent freezing damage, the important thing is the corrosion inhibitors which must be kept up to strength (and renewed periodically).

[5yearstobuyatvr]

Thanks for that,are the inhibitors already in the antifreeze solution or are these added,

[GreenV8S]

The corrosion inhibitors are part of the antifreeze mix. The corrosion inhibitors get 'used up' over time so you need to start with a strong enough mixture to ensure that by the time you get round to replacing the coolant next time, it is still strong enough. Somewhere in the region of 30-50% is ample assuming you're replacing the coolant every couple of years.