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How much radiator coolant....

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Old Jun 16, 2018 | 04:04 PM
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cjbronco's Avatar
cjbronco
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How much radiator coolant....

Hello everyone. It’s been a very long time since I’ve posted on here. I just picked up a 1973 F250 Ranger Camper Special w/360.

we did a radiator flush today. To my surprise we only took out about 2 gallons. When we flushed and refilled, we only used about 2.5 gallons. My cause for concern is everyone I have read or know says we should be using at least 4-4.5 gallons.

any ideas or do I simply have it wrong?

thanks
 
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Old Jun 16, 2018 | 04:08 PM
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flatbedfordguy
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Depends on the radiator, the "Super Cooler" rad takes 24qts. (I think) the smaller rads much less. Did you "burp" the system to get all the air out?
 
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Old Jun 16, 2018 | 05:00 PM
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Same thing here on my 1979 F350 camper special ( I think it's actually a trailer special) with a 460 engine, I draining and replaced my coolant, expecting it to be about 5 gallons, nope, was only about 2 or so in my truck as well!! Even after burp it seemed full to me..
 
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Old Jun 16, 2018 | 05:47 PM
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A lot of coolant remains in the block as you've discovered. If you started with an empty cooling system it will take the full capacity to fill.
 
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