flushing radiator coolent - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 21 (permalink) Old 06-17-2009, 06:29 PM Thread Starter
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flushing radiator coolent

I want to flush my radiator coolent this weekend. How much antifreeze am I going to need?

96 F250 regular cab long bed 4x4, 176,000, 4inch exhaust with 6''x24'' tip, Gauges (boost, pyro, tranny temp) DIY intake, Dp-tuner F5 (80echo, 120hp, 140hp, 60 tow, lope idle) 33x12.5 BFG AT's on eagle rims with a front leveling kit. And to many lights on it.
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post #2 of 21 (permalink) Old 06-17-2009, 06:46 PM
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About 4 gallons of the stuff along with a bunch of distilled water.

Make certain you don't get the pre-mixed antifreeze.

Waste of $ and you'll then need 8 gallons.

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post #3 of 21 (permalink) Old 06-17-2009, 06:48 PM
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I wanna know what you do with the used stuff.

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post #4 of 21 (permalink) Old 06-17-2009, 06:54 PM
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Auto parts stores used to take it, but I have a good relationship with the garage that does all our company's service work so I just took it to him in a couple of 5-gallon pails.

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post #5 of 21 (permalink) Old 06-17-2009, 07:13 PM Thread Starter
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yea I don't ever buy the premix stuff. its just as easy for me to get water out of my evaporator in the basement

96 F250 regular cab long bed 4x4, 176,000, 4inch exhaust with 6''x24'' tip, Gauges (boost, pyro, tranny temp) DIY intake, Dp-tuner F5 (80echo, 120hp, 140hp, 60 tow, lope idle) 33x12.5 BFG AT's on eagle rims with a front leveling kit. And to many lights on it.
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post #6 of 21 (permalink) Old 06-17-2009, 07:25 PM
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Did someone have a link on the procedure? Also, which coolant?

Early 1999 F350 DRW Dump, 6spd 4x4, 4" Turbo Back and DIY Intake

Early 1999 F350 SRW 8' Box, 6spd 4x4 Stock
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post #7 of 21 (permalink) Old 06-19-2009, 01:52 AM
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Originally Posted by brendonv View Post
Did someone have a link on the procedure? Also, which coolant?
There's a petcock on the bottom of the radiator, driver's side. Open it, and let all the fluid drain. Close the petcock, and refill system with new 50/50 mix.

One year later, repeat the above procedure.

If you skip a year or two, then the procedure gets much more involved. You'll have to flush everything multiple times, it takes a half day and your neighbors will get upset for all the green water running across their lawn.

There's too much controversy on coolant types. You'll have to make your own decision. I would suggest doing a Google search, or asking the counterman at NAPA.

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post #8 of 21 (permalink) Old 06-19-2009, 02:39 AM
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I hear ya on the confusion, that's why I've never done it yet.

I bought the truck 3 years ago, think it's about time to do the flush. I have access to distilled water, is it a bad thing that all the old coolant wouldn't get flushed out? If I do it a couple times a year, I'm guessing eventually all the old coolant will be diluted/recycled out and it'd be fresh at some point.

Early 1999 F350 DRW Dump, 6spd 4x4, 4" Turbo Back and DIY Intake

Early 1999 F350 SRW 8' Box, 6spd 4x4 Stock
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post #9 of 21 (permalink) Old 06-19-2009, 02:54 AM
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Originally Posted by brendonv View Post
I hear ya on the confusion, that's why I've never done it yet.

I bought the truck 3 years ago, think it's about time to do the flush. I have access to distilled water, is it a bad thing that all the old coolant wouldn't get flushed out? If I do it a couple times a year, I'm guessing eventually all the old coolant will be diluted/recycled out and it'd be fresh at some point.
I would have to agree with this method.

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post #10 of 21 (permalink) Old 06-19-2009, 12:58 PM
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Cool.

How do you get it so you can drain most of it? Should the truck be hot with the heat on before you turn it off and empty?

Early 1999 F350 DRW Dump, 6spd 4x4, 4" Turbo Back and DIY Intake

Early 1999 F350 SRW 8' Box, 6spd 4x4 Stock
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