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post #1 of 10 Old 11-08-2011, 09:03 PM Thread Starter
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Coolant change?

Is there anyway to get most of the old coolant out of the system. I want to change my 7.3 over to ELC coolant but all I can find around me is 50/50 mix. Is it possible to get the old stuff out?

Also, whats the deal with the hotter 203* t-stat. Are you guys seeing better gas mileage with the hotter stat?

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post #2 of 10 Old 11-09-2011, 12:58 AM
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pull the plugs on the block as well, lil hex plugs, should be able to find them, i forget what size tho.
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post #3 of 10 Old 11-09-2011, 04:03 AM Thread Starter
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Will that drain most of it? Thanks!

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post #4 of 10 Old 11-11-2011, 01:45 PM Thread Starter
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Can anyone confirm this? If I pull the plugs on the block will it drain all the coolant?

Any info on the t-stat? Thanks.

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post #5 of 10 Old 11-17-2011, 08:32 AM
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i drained the rad, then pulled the lower hose. after that i pulled the the plug on either side of the block(just a 1/4'' ratchet head). drained as much as i could filled with water and repeated twice to get it all out

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post #6 of 10 Old 11-17-2011, 08:46 PM Thread Starter
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Quote:
Originally Posted by 86lxnotch View Post
i drained the rad, then pulled the lower hose. after that i pulled the the plug on either side of the block(just a 1/4'' ratchet head). drained as much as i could filled with water and repeated twice to get it all out
How much fluid did you get out with this method?

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post #7 of 10 Old 11-17-2011, 08:49 PM
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I drained the radiator and flushed the heater lines with the cheap little prestone kit on the heater core lines. Then used DISTILLED water, filled it up, ran it w/no thermostat. Drained just radiator. Did this with 20 or so gallons of distilled water. Then after the final drain I filled up four gallons of concentrate ELC, then topped off with distilled which gives you a 50/50 mix.
I run the 203* thermo. Maybe a big better mileage, probably not that much. 203* is the IH temp for the T444E not the Ford 198*. It's a big smoother once at full operating temp. I like it. Also did a coolant filter modeled after DieselSite's.



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post #8 of 10 Old 11-17-2011, 08:51 PM
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i dunno didnt really pay attention the first time. i just did it multiple times(hence calling it a flush) until i got clear water out of it, let it sit and drain whatever it could for about a half hour then plugged it all back up and filled it with CAT ELC coolant and called it a day

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86 lx notch....more torque than the truck
408w and 101mm-9.27@134 lifting

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post #9 of 10 Old 11-18-2011, 07:22 AM
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You can use this method. This way it gets all the old coolant out of the heater core as well.

v=tpYCfqcNEh4

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post #10 of 10 Old 11-21-2011, 02:32 PM
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The video above is the method I use.
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