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5.0L (1979-1995) Mustang Technical 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.

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Old 06-19-2007, 04:06 PM   #1
adumb
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Default how much antifreeze

trying to fill up my 91 with antifreeze and it seems i have been toping it off for the past couple days.. i checked my haynes manual but that book is probably the most useless service book i have ever bought. so does anybody have a number of how much antifreeze it should take. i have put in probably more then a gallon and a half already. i don't see any leaks but i am used to motorcycles that only takea quartso this seems like alot of antifreeze i am putting in
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Old 06-19-2007, 04:07 PM   #2
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Default RE: how much antifreeze

untill its full haha. take the cap off and run it for a while let watch the coolant go down and then fill it as its running then fill your overflow
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Old 06-19-2007, 06:09 PM   #3
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Default RE: how much antifreeze

Should be closer to 3 1/2 gallons (14qts.) with a stock rad.

Like HACK said, just fill it with the engine running and add coolant until it covers the holes inside the rad. I add a lil to the overflow also up to the cold mark.
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Old 06-19-2007, 06:42 PM   #4
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Default RE: how much antifreeze

^+1... just keep filling, i buy 2 gallons when i flush n fill + h2o and use almost all of it.
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Old 06-19-2007, 08:03 PM   #5
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Default RE: how much antifreeze

i wish i would have known this info before cause i really have no idea how much i have put in so far.

how long does the car need to run before the t-stat opens?
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Old 06-19-2007, 11:29 PM   #6
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Default RE: how much antifreeze

Until it hits 195 or whatever the thermostat temperature you have in it.
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Old 06-19-2007, 11:35 PM   #7
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Default RE: how much antifreeze

Let the engine cool. Remove the cap and check the level. Youll know if its full or not.

If the lil holes inside the rad are all covered, its full. Its easy.
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Old 06-19-2007, 11:35 PM
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1995, 1996, 50, 91, 99, antifreeze, coolant, fill, fluid, fox, foxbody, gt, mustang, put, radiator

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