|
Using the garden hose for cleaning/filling coolant is typically reserved for last resort type stuff. Most city/well water is hard water that will lead to some scaling.
Buy several (>6) gallons of distilled water and use that. Set aside one of the gallons with your proper coolant. I usually take had of the concentrate and make a 50/50 mix. Once the water runs clear from the drain, I add the concentrate. Then I add the 50% mix until it's gone. Add distilled water til reservoir is full. Use a tester to verify 3 balls floating. Should be about -35f.
To speed refilling a N52, I pull the upper radiator hose. Make sure you get coolant all the way to the coolant pump and that the reservoir stays above the low mark.
Before starting would be a good time to "refresh" the plastic components in the coolant system. I've seen more dead BMW engines from a broken plastic connector than from anything else.
|