Can anyone offer advice on replacing coolant in a 2003 Plus 8? Is it as simple as undo the main rad cap (not the overflow) and then undo the drain tap underneath the rad at the bottom?
Or are there some hoses to slacken to avoid airlocks?
I must confess I am only doing this after n years, where n is a very large integer....
Many thanks
If your refilling with standard water/anti-freeze mix then DaveW's method is fine, however if you are replacing with Evans waterless coolant you need to get all the water out and then use their flush, empty again and the fill with the waterless coolant. Drain using the tap on bottom of rad, undo rad cap and filler plug squeeze large hoses to ensure water is expelled check expansion tank and undo it's cap, I would remove it and empty and refit.
I have not used Evans and on my +8 not sure I need to however got to a constant 95-100C today running around at 50mph in Devon, but only when in traffic once moving went back to 90c. I do remember reading about using a freer flowing thermostat that allows the water to be pumped better to the rad and around the engine.
Ps if you do use Evans I would be interested how you find it.
