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5.0L (1979-1995) MustangTechnical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.
Used the search function, didn't find an answer I could use. Anyway, changed the thermostat and flushed the coolant system. Just wanted to know how long I sould let the car run to ensure that all new fluids were mixed well?
That's what I did.. I just wanted to make sure that all the coolant in the block was the same "mix" that I tested in the rad. after flushing.. I did the flush with distilled water until clear and filled with Prestone straight, then 50/50, run for 20 minutes ('stat open, heater blowing hot) tested the coolant, all good....