Coolant type and mixing question - Ford Powerstroke Diesel Forum
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Old 06-22-2014, 01:37 PM
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Coolant type and mixing question

My truck needs some coolant. It's definitely not the green stuff. It looks yellow or orange. Is it safe to assume that dexcool orange coolant is safe to top off with? ....I don't know what coolant is in it now. I bought the truck only a few weeks ago.
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Old 06-22-2014, 01:46 PM
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My suggestion would be since you don't know don't guess. I would get distilled water to top it off with and then get or order a Nitrite Free ELC that is Cat approved, 3 gallons full strength. It would be a good idea to flush the system with Restore Plus and then refill with the new coolant and distilled water. You will need to remove the drain plugs from the block to properly drain the system too.
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Old 06-22-2014, 09:34 PM
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Do NOT use Dex-Cool! It was very specifically formulated for use in GM engines, and even with that, it was problematic.

Do not use ELC; our trucks are not compatible with ELC. Unless what you're seeing is more pinkish-orange than yellowish-orange, the PO probably used one of the yellow-dyed ELC products, which means you should def. change the coolant. If it looks more pinkish, there's a possibility that it's FleetCharge, which is old-school ethylene glycol with SCA added. You should use either FleetCharge, or plain-old green anti-freeze and SCA.

Three gallons is not enough; you need FOUR gallons of anti-freeze and the rest distilled water. You'll need to remove both block drains AND open the radiator drain. You should also flush the system via the heater hose with a tee. Drain again, fill with distilled water, drain once again (to flush out the tap water from the garden hose), then add distilled water and anti-freeze (and SCA if applicable). One of the diesel forums has a more detailed procedure, written by a guy who goes by Gooch. Just do a general search on "gooch coolant flush" or something; you'll find it.
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Old 06-23-2014, 06:16 AM
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Quote:
Originally Posted by madpogue View Post
Do not use ELC; our trucks are not compatible with ELC. Unless what you're seeing is more pinkish-orange than yellowish-orange, the PO probably used one of the yellow-dyed ELC products, which means you should def. change the coolant. If it looks more pinkish, there's a possibility that it's FleetCharge, which is old-school ethylene glycol with SCA added. You should use either FleetCharge, or plain-old green anti-freeze and SCA.
^2nd, this is OBS gospel right here^
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Old 06-23-2014, 06:19 AM
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Great...thanks!

I'll be picking up some fleetcharge here soon. I'm in the process of getting new hoses and a 203 degree thermostat. Also picked up a coolant filter.
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Old 06-23-2014, 06:24 AM
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There has been a rash of people on here changing out the thermostat and not getting all the air out behind it first. ALWAYS drill a tiny (like 1/64" tiny) hole in the rim of the thermostat and you wont have an issue.

This one comes from the factory like this but same effect. This tiny hole will allow the trapped air to get past the thermostat and keep the overheating blues at bay:

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Old 06-23-2014, 07:05 AM
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Thanks for the tip!
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Old 06-23-2014, 08:08 AM
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Are you near an Advance Auto? Deal option - find out if the AA near you carries the FleetCharge, order it online for store pickup, then hit TRT30 in the promo code, 30% discount, brings it down to aprx. $11 /gallon.
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Old 06-23-2014, 02:54 PM
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I second the regular old Green anti freeze with the SCA additive(napa kool)

You can get it EVERYWHERE, unlike some of the other specialized coolant
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Old 06-23-2014, 03:01 PM
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Green anti-freeze may be available everywhere, but the SCA is available in fewer places than Fleet Charge. You can get Fleet Charge at Tractor Supply these days. Only places I know of for SCA are the International dealer (muy expensivo), online or NAPA. All depends on what's in your neighborhood.
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