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Old 05-28-2009, 02:52 PM   #1
nicolas72gmc
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Coolant Capacity

Does anyone know off-hand what the approximate coolant capacity is on our trucks. I can't find it in my service manual anywhere. BTW, stock radiator, 1/2 ton, uhhh what else...... Thanks in advance.
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Old 05-28-2009, 03:31 PM   #2
Hottrucks
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Re: Coolant Capacity

I think my 4 core takes 2.5 gallons if remeber right I just had the rad done??
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Old 05-28-2009, 03:37 PM   #3
El Jay
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Re: Coolant Capacity

It varies depending upon engine & application.
Anywhere from about 12 1/4 qts for a 250 c.i., I-6; to nearly 20 1/2 qts. for a 400 c.i. with a HD cooling system

What I do with an empty cooling system is dump in 1 gal. of antifreeze followed by 1 gal. of distilled water. Then I use the empty antifreeze jug to mix a 50:50% ratio of antifreeze to water to top things off.
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Old 05-28-2009, 09:42 PM   #4
Stocker
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Re: Coolant Capacity

Quote:
Originally Posted by El Jay View Post
It varies depending upon engine & application.
^^ Yup. I seem to recall my 350 has about 4 gallon capacity -- I have always used 2 gallons of Prestone followed by enough water to fill the system, then I add 50/50 mix as required to the overflow jug.
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