Join Date: Jun 2004
Location: In the Back of your Mind
If you have a funnel with a long narrow tube you might be able to fill the overflow reservoir without removing the wheel. It might help to jack up the car a bit at the RR corner to get your hand in there.
But historically, you are best off removing the wheel, then remove and clean the bottle on the inside. (Use a brush for cleaning coffee pots) Otherwise you could mistake the 'scum' residue as coolant level.
It is also wise to tighten any clamps between the overflow and header tanks (if they are loose they could suck in air, when it should be drawing coolant back to the header).
Succasunna, NJ USA
"Not all angels have wings." - Turbo R