You'll need to loosen and remove the lower hose to drain the radiator, then just pop it back on. Sometimes it helps to remove the n/s front wheel so you can push the hose off, failing that get your arm down the back of the engine and give it a good tug, once you've removed the jubilee clip of course.
Cheers,
Taffy
Does anyone know the best way to drain the old coolant from a 1989 998 Mini
> engine No. 99HE20...? There doesn't appear to be a drain plug below the
> manifold like there was on earlier engines.
>