Aluminium Radiator Antifreeze??

[hillclimbmanic]

Hi there...We've just fitted an Aluminium Radiator from 'Coolex'. Nice piece of kit. Which colour antifreeze should we be using? I am given to understand that the copper/brass rads were the reason for blue?

Any advice would be gratefully appreciated!

Manic

[Harvy500]

I had an ally radiator fitted by powers performance last year when I had my engine rebuilt and MBE ECU fitted.
They put blue anti freeze in. I'm sure it's the right stuff as powers know what they're doing.

[BritishTvr450]

The engines alloy so blue would be the correct choice.

I’ve had an alloy rad for the last 13 years using blue and it still works.

From completely empty so including heater matrix it should take something like 13 litres to fill and requires 1/3rd anti freeze. I tend to put about 5 litres in as safe keeping. Some use a 50/50 mix which can’t do any harm. Changing it every few years is a good idea as internal corrosion can cause perfectly good engines to be scrapped or very difficult to repair.

[Loubaruch]

Many owners of Vintage (pre 1931) cars prefer to use Fernox Alphi-11 central heating antifreeze/inhibitor. It is not as efficient as ethylene glycol at cooling but is far superior as an inhibitor to prevent corrossion of aluminium, copper, brass etc. I use it all the time in my Griffith and find it OK.