Quote:
Originally Posted by steel10
The cooling system capacity is 27.5 quarts. When I removed the pet****, 12 quarts drained out. After every drain, 15.5 quarts would be left in the engine. When I refilled with 2 gallons of Ford Gold Antifreeze that would equate to a concentration of 8 quarts antifreeze / 15.5 quarts distilled water (52% antifreeze / 48 % water). I then took a gallon of antifreeze and drained out 50%. I refilled the antifreeze bottle with distilled water. I used this 50/50 mixture to top the system off so that I was at the minimum line on the sticker on the side of the reservoir. I checked the freeze protection using a coolant tester. It indicated that I was good down to ~ -42deg F which would indicate that I had a concentration slightly greater than 50/50. A 50/50 concentration would yield a -34 deg F freeze protection.
Codu
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When you flushed with distlled water, you filled the block with water and NO antifreeze. Eventually what is left in the block is PURE WATER - ZERO antifreeze. You put in a 50/50 make up, but you mixed it w/ the PURE WATER that was left in the block.
If the TOTAL SYSTEM is 27.5 quarts (which it is), AND if you flushed ALL of the old coolant out ......................
Then the only way to get to a 50/50 mix is to add 13.75 quarts (or almost 3.5 gallons) of PURE antifreeze back in.
Freeze protection checks are only one thing that is important. If you do not get the proper concentration, then you do NOT have the proper corrosion protection (and diesel engines can be corrosive!).
