As per the thread title, I had been considering replacing the coolant in my February 2011 B8 S4 mileage is low, 26K!
Anyway, I have been testing the ph level at every service using coolant test strips and checking the freezing point using the same strips and a refractometer. It still seems to be okay so up until now I have left the G12 or maybe G12 plus in it.
At this years service, I noticed a few spots of evaporated coolant on the engine under cover - looking upwards leads me to believe that it is coming from the engine end of the coolant hose that connects to the radiator lower RHS - and I'm guessing that the reason for this slight leak is that this pipe would have been flexed when the lock carrier was pulled out to the service position when I replaced the supercharger and auxiliary belts last summer/autumn.
So, I've ordered in a couple of new O-rings and springs and replacing them will mean dumping the coolant out - so this seems like the best time to replace it.
I'm planning on buying maybe 15 litres of G12EVO premixed, as buying conc G13EVO is not possible in smaller than 60 litre containers.
So, my question is, what coolant are people using when they replace watch was loaded in at the factory?
One curious thing I noticed when I looked at a G12plus and a G13 1.5 litre of conc, the G13 conc container defines G13 as being a "filled for life" coolant additive, that comment is not on the G12plus conc container, which seems strange when it seems to be G13 that gave rise to the addition of Silicate pouches in coolant header tanks.
I've got a coolant vac kit and ordered in a couple of supercharger heat exchanger plugs as I read that sometimes they are tricky to remove and reuse.
Anyway, I have been testing the ph level at every service using coolant test strips and checking the freezing point using the same strips and a refractometer. It still seems to be okay so up until now I have left the G12 or maybe G12 plus in it.
At this years service, I noticed a few spots of evaporated coolant on the engine under cover - looking upwards leads me to believe that it is coming from the engine end of the coolant hose that connects to the radiator lower RHS - and I'm guessing that the reason for this slight leak is that this pipe would have been flexed when the lock carrier was pulled out to the service position when I replaced the supercharger and auxiliary belts last summer/autumn.
So, I've ordered in a couple of new O-rings and springs and replacing them will mean dumping the coolant out - so this seems like the best time to replace it.
I'm planning on buying maybe 15 litres of G12EVO premixed, as buying conc G13EVO is not possible in smaller than 60 litre containers.
So, my question is, what coolant are people using when they replace watch was loaded in at the factory?
One curious thing I noticed when I looked at a G12plus and a G13 1.5 litre of conc, the G13 conc container defines G13 as being a "filled for life" coolant additive, that comment is not on the G12plus conc container, which seems strange when it seems to be G13 that gave rise to the addition of Silicate pouches in coolant header tanks.
I've got a coolant vac kit and ordered in a couple of supercharger heat exchanger plugs as I read that sometimes they are tricky to remove and reuse.