Not sure, but I am sure this is a problem I will face when I change mine out. If you find out, please let me know if they are in the same location on the 3.8L V8.

Now I am confused as to what type of water to use in my cooling system with the anti-freeze. We have a water purification system built into our homes water system, that is supposed to be even better than any bottled water purchased in a market.

Would this water be safe to use in my cooling system, or should I use bottled water instead? If so, what should I use - distilled, drinking or spring water?

Also- since the green coolant has been in my radiator, will any further corrosion be halted if I switch to the MB coolant? Lastly, will one gallon of MB anti-freeze be sufficient for my car? I live in a climate where our temperature rarely drops below 15*. Our "coldest" average low in the dead of winter (which this time of year) is 24*, but last night we only dropped to 47*, and it was 68* today (average is 44* for the date) so as you can see, winters can be rather mild here.

So, if I use one gallon of MB coolant and the rest is water, about what temperature will it be protected to?

Thanks!