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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.
when you start it up leave the cap off the radiator becuase you get a good air bubble in the system after having the water neck off. once the engine gets up to temp the t-stat will open and suck the coolant in and the air bubble will escape then you add coolant till its full and your done
I knew that lol. My car always seemed to run pretty cool, turns out the thermostat that was in it was a 192° one, so it should run about 12° cooler or so...