I have recently changed the antifreeze in my car - Mazda 626 2000i GT, 1988 refilling with Comma Coldstream (Triguard) (undiluted it comes ready mixed) after carefully flushing out all the previous two year old mono ethylene glycol mixture.

I have noticed that the hoses and rubber components in the cooling system seem to have softened and swollen - for example the extension pipe in the overflow reservoir fell off its spigot due to having swollen (I've refixed it with a hose clip) and the top radiator hose seems swollen like a balloon when hot.

Is this normal? Should I worry, or consider replacing the Coldstream with conventional mono ethylene glycol? There is no loss of coolant (so far!)

Regards

John Cookson

Regards Bill