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Old 04-19-2011, 03:52 PM   #31
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To make it real easy, just buy the premixed 50/50 coolant. That way you don't have to go through the "mess & guess" BS when mixing it.
Using the pre mixed will throw off the water/antifreeze ratio as there is going to be water leftover in the block. Unless you pull the block drain plugs you will have to quite a bit more water. Pulling the drain plugs is an even bigger PITA than mixing, if fact mixing it yourself is quite simple.

TJ is a 10.5 quart system. That means 5.25 quarts water and 5.25 quarts antifreeze for 50/50. After flushing, put 5.25 quarts of antifreeze in the radiator, top off with water. Turn the engine on with the radiator cap off, let the engine get to temp so the thermostat opens, then continue filling with water until it's fully topped off.

That method will not only give you a near perfect mix, it will burp the system of air.

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Old 04-20-2011, 03:59 PM   #32
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Originally Posted by freeskier
Using the pre mixed will throw off the water/antifreeze ratio as there is going to be water leftover in the block. Unless you pull the block drain plugs you will have to quite a bit more water. Pulling the drain plugs is an even bigger PITA than mixing, if fact mixing it yourself is quite simple.

TJ is a 10.5 quart system. That means 5.25 quarts water and 5.25 quarts antifreeze for 50/50. After flushing, put 5.25 quarts of antifreeze in the radiator, top off with water. Turn the engine on with the radiator cap off, let the engine get to temp so the thermostat opens, then continue filling with water until it's fully topped off.

That method will not only give you a near perfect mix, it will burp the system of air.
When doing this, is there a recommended 50/50 brand I should use? and what do I put in the coolant reservoir? Thanks

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Old 04-20-2011, 05:53 PM   #33
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When doing this, is there a recommended 50/50 brand I should use? and what do I put in the coolant reservoir? Thanks
you want to use Zerex GO5 and distilled water. Zerex GO5 is HOAT, which is what you want.

buy a 5 gallon bucket and mix it there if you want to.
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Old 04-21-2011, 08:28 AM   #34
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you want to use Zerex GO5 and distilled water. Zerex GO5 is HOAT, which is what you want.

buy a 5 gallon bucket and mix it there if you want to.
thanks, freeskier said how much to put of everything in the radiator, what about in the coolant reservoir itself?
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Old 04-21-2011, 09:04 AM   #35
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thanks, freeskier said how much to put of everything in the radiator, what about in the coolant reservoir itself?
Whoops, I'm sorry I lied. 10.5 quarts is including the overflow bottle and the bottle is 1 quart. That means fill the system up with 9.5 quarts total. The method still works, that just means fill the rad up with 4.75 quarts of antifreeze, then continue topping off with water.

That means the reservoir should be filled up with half a quart antifreeze and half a quart water.
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Old 04-21-2011, 10:41 AM   #36
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Whoops, I'm sorry I lied. 10.5 quarts is including the overflow bottle and the bottle is 1 quart. That means fill the system up with 9.5 quarts total. The method still works, that just means fill the rad up with 4.75 quarts of antifreeze, then continue topping off with water.

That means the reservoir should be filled up with half a quart antifreeze and half a quart water.
thanks that makes sense now ha im going to finish flushing my system this weekend then do that
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Old 04-21-2011, 05:32 PM   #37
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I flushed mine and popped off the therm cover. It was rusted in there. The guys are right, flush it and put in some new coolant.

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