E30 Zone

Just filled up my radiator with water and when it came to the top I noticed that the water was a rusty brown colour - is this normal?? I've had no issues with the cars performance, but just want to nip this in the bud now if there are any problems.

Help is much appreciated!

It has probably been run without antifreeze at some point. The reason it's supposed to be used all year is that it contain rust inhibitors to help stop corrosion. If its not overheating or losing water you're probably ok. I got rid of the rusty colour on a Renault of mine by disconnecting the coolant pipes in turn and running a hose pipe both ways until it went clear then using a coolant flush. The water was lovely and clear, clear enough to see the exhaust gases bubbling through it... Straight to the scrappy

yea normal enough, a good hose normally gets rid of most of it but in my experience its always been common enough.

Shouldn't be orange stuff in there!! Definitely been run without or with old antifreeze.
Get it flushed out with a chemical flush, take the radiator out and back flush it, then fill with decent antifreeze. Replace every two years.