strength of antifreeze/coolant

[Motster]

How do you check the strength of antifreeze/coolant, to know it it needs changing?

[Toureman]

It doesn't need changing if the mixture of water to antifreeze is weak, just top it up with antifreeze to reach the right mixture.

Your coolant should be renewed every 2 years due to it losing it's anti corrosion properties.

You can get a tester from Halfords, very cheap, full instructions come with it.

[chadad]

Simple, just draw off a small amount in a plastic container.
( A plastic bottle cap will do ).
Then leave it overnight in your freezer.
If it ices up then your mixture is too weak.

[david1702198]

or you could buy an anti-freeze tester from an auto shop which will tell you.