I just completed a reverse coolant flush on my "66 big block using the Prestone Flush Kit which worked well. I ran the engine for about 10 minutes until just water was coming out of the deflector tube. After the engine cooled, I drained the water out of the radiator and slowly added Zerex GO 5 antifreeze with the cap off the T inserted in the heater hose. Once the level of the antifreeze in the radiatior was about 3 inches from the top, I ran the engine with the radiator cap off and heater on full, level of antifreeze dropped and I then added more.
I was able to get 11 qts of antifreeze into the system and the level is about 2 inches from the top of the radiator. Given the coolant capacity of the engine, I assume I am now at about a 50/50% mix of antifreeze and water, does this sound correct?
I was able to get 11 qts of antifreeze into the system and the level is about 2 inches from the top of the radiator. Given the coolant capacity of the engine, I assume I am now at about a 50/50% mix of antifreeze and water, does this sound correct?
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