Top up or buy anti freeze?

FlaatusGoat

Had my radiator flushed and refilled quite recently, but the coolant level in the reservoir has gone down a bit. Should I be buying a bottle of the correct mixed anti freeze to top it up with or for this is regular (boiled) water okay since there's already antifreeze in the system?

Nobbie1967

Why not pop back and get the garage to top up with the right stuff? Although I don’t think there would be an issue with using a small amount of water.

FlaatusGoat

Nobbie1967 said:

Why not pop back and get the garage to top up with the right stuff? Although I don’t think there would be an issue with using a small amount of water.

100 mile round trip. When we say a small amount of water on my reservoir tank I'm on 'min' and I should get it up at least to max. Could this be too much water and cause over dilution

MikeJXE

It's your choice but if it was me I would top it up with antifreeze then I can't be in the wrong 

Bigwheels1111

This is normal, a bit of air is always trapped after a coolant change or flush.
If the garage is local go back and ask for it to be topped up.
I would not top it up with water etc if it needs a pint or so as will weaken it ability.
But if it only needs a cup full I would just top it up.

facade

As above, ask for a top-up if you can, otherwise I'd pop into Tesco and get a litre of (unbelievably expensive) Prestone ready to use coolant.

This will mix with any antifreeze, and keeps for 10 years in case you need to add a bit more later.

As above, a small cupfull of water is unlikely to hurt, any more and you are reducing the anti-corrosion effect- I doubt if the freezing point difference will matter in the UK.

Nobbie1967

FlaatusGoat said:

Nobbie1967 said:

Why not pop back and get the garage to top up with the right stuff? Although I don’t think there would be an issue with using a small amount of water.

100 mile round trip. When we say a small amount of water on my reservoir tank I'm on 'min' and I should get it up at least to max. Could this be too much water and cause over dilution

Min to max is probably only 250/500mm doubt it would have any meaningful effect to use water rather than coolant. It will slight raise the freezing temp, but unless you live in the highlands of Scotland this won’t be an issue. What car is it?

FlaatusGoat

Nobbie1967 said:

FlaatusGoat said:

Nobbie1967 said:

Why not pop back and get the garage to top up with the right stuff? Although I don’t think there would be an issue with using a small amount of water.

100 mile round trip. When we say a small amount of water on my reservoir tank I'm on 'min' and I should get it up at least to max. Could this be too much water and cause over dilution

Min to max is probably only 250/500mm doubt it would have any meaningful effect to use water rather than coolant. It will slight raise the freezing temp, but unless you live in the highlands of Scotland this won’t be an issue. What car is it?

It's a Nissan Note 1.5 DCI

clive0510

what antifreeze did they use? a kinda blue/green colour or the pink stuff.

FlaatusGoat

clive0510 said:

what antifreeze did they use? a kinda blue/green colour or the pink stuff.

The orange one, OAT I think it's called