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Old 07-27-2007, 09:37 AM   #1
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Default Flushing Cooling System

I want to flush my cooling system tonight after work, but I wasn't sure how many gallon jugs of the Prestone mix with any color (green) i needed. I keep looking on autozone or advance auto, but they don't tell you how much the jugs hold. I think it'* a gallon, can anyone second that?

Then, does anyone know how many gallons our cooling system holds?

I am flushing out the dex and putting in green.

Top heater hose is where the T-spice goes right? -- And any other hints or tricks that would help me doing the flush would help also, thanks guys.
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Old 07-27-2007, 10:31 AM   #2
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I don't think you want to buy the pre mixed stuff anyway. When you flush it, you will be using water, and you won't be able to remove all of the water in the system. So what you want to do is put in the required amount of coolant based on how much the system holds and then top it off with water. But the jugs should be a gallon.
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Old 07-27-2007, 11:46 AM   #3
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The cooling system capacity is listed in the owner'* manual under either specifications or capacities. I don't recall which one. It will list the entire system capacity, as well as for the radiator. I think that the entire system is 13 quarts, and the radiator holds about half of that. So, if you flush the entire system, filling the radiator with 100% coolant will give you about a 50/50 mix. Coolant is sold in gallons, and the T does go in the top heater hose.

This is a link to filling the system
Draining and Filling Cooling System

And Bill Buttermore'* procedure in techinfo, if you do repair work.
http://www.bonnevilleclub.com/forum/...=article&k=100
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Old 07-27-2007, 11:48 AM   #4
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13 Quarts = my cooling system. That means 3 and a 1/4 of those prestone (1gallon jugs).

If i buy 2 pure antifreeze not (50/50) empty them into the system, then use water for the rest, then I should be good.

To clarify... 2 of the not mixed would be over half of the system, then fill the rest with water and that will be pretty close to the 50/50 ratio.

Also, the top heater hose is the right one to splice right?

Edit - Sorry Archon you posted while I was still typing.. haha, thanks for all the help!
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Old 07-27-2007, 11:55 AM   #5
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Not a problem - has happened to me more than once.
You can safely go to 70% coolant, without problems, according to GM. So, you can just fill the radiator with coolant, without adding water.
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Old 07-27-2007, 12:21 PM   #6
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Does 13 quarts include the reservoir?
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Old 07-27-2007, 12:30 PM   #7
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I don't know for sure, but my guess would be that it does not.
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Old 07-27-2007, 12:36 PM   #8
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I would agree
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Old 07-27-2007, 12:37 PM   #9
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A trick I have found is .. once you flush as much as possible..if you have a compressor handy..try and blow most of the air out of the system. Then when you fill...add distilled water with the coolant to finish it off.

Around my area, there is hard water and that doesn't provide the best cooling properties. Distilled is reasonably cheap and works better.
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Old 07-27-2007, 12:38 PM   #10
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Yeah, the hose I am going to flush it with has hard water, so I will pick up a couple gallons of distilled water to finish off the system.

Thanks
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