7.3L Best Coolant? - Diesel Forum - TheDieselStop.com
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99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the 99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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Old 01-30-2008, 07:25 AM   #1 (permalink)
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7.3L Best Coolant?

What is the best brand of coolant to use in the 7.3L engine?

Thanks
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Old 01-30-2008, 08:32 AM   #2 (permalink)
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You might want to include the best brand of oil in your question.

There are many good brands. Do you have a favorite that you are wanting to know if it is ok to use? My favorite brand is Fleetguard. But there are many others that I would be satisfied with.
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Old 01-30-2008, 08:55 AM   #3 (permalink)
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The intent was for compatability. I've had several concerns on silicate issues and just wanted to make sure that I put the right type, not necessarely brand, as not to harm the engine.
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Old 01-30-2008, 09:04 AM   #4 (permalink)
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If you are flushing and refilling your cooling system there are many good choices. If you are adding to what is currently in there, you should use the same as what's in there. Your truck came with Ford Gold coolant. The same coolant can be purchased at auto parts stores. Look for G-05 on the jug.

As for silicate concerns, you will want a low silicate, less than 250 ppm, formulation. Most of the ELC coolants have no silicate.
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Old 01-30-2008, 09:30 AM   #5 (permalink)
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Im glad this topic came up as I am about to replace the coolant in all 4 of our PSD's. Also can someone tell me the benefit and the reason guys are installing coolant filters? And are they needed for an everyday driver?
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Old 01-30-2008, 09:41 AM   #6 (permalink)
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Quote:
Originally Posted by 444-4D View Post
If you are flushing and refilling your cooling system there are many good choices. If you are adding to what is currently in there, you should use the same as what's in there. Your truck came with Ford Gold coolant. The same coolant can be purchased at auto parts stores. Look for G-05 on the jug.

As for silicate concerns, you will want a low silicate, less than 250 ppm, formulation. Most of the ELC coolants have no silicate.

I agree. I use Motorcraft Gold Coolant.
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Old 01-30-2008, 09:57 AM   #7 (permalink)
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Heavy Duty ELC's are what the manufacturer of the engine, International, recommends. My favorite brand is Chevron Delo ELC. But others including CAT ELC, Fleetrite ELC, Fleetguard ELC, Rotella ELC, Texaco ELC, Mobil 1 ELC, are excellent too.

These coolants are made specifically for diesels and meet the most strict coolant specifications in the industry, like EC-1. Unlike the G-05 and conventional coolants they are silicate-free to make your water pump happier. They are maintenance-free with operating lives and flush intervals many times that of conventional and G-05 coolants. They will provide significantly better heat transfer, and they contain a more robust cavitation and corrosion inhibitor, particularly as operating time adds up.

As mentioned, when adding to existing coolant, it's always best to be consistent. Mixing types of coolants is not recommended. There are thorough flush instructions listed at this site for a proper switch-over to a different coolant technology. Installing a coolant filter is always a good idea. Most all coolants are good, with some better than others. Properly maintaining them is the key, no matter which one. The choice is really yours, and how you define "best".
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Old 01-30-2008, 11:02 AM   #8 (permalink)
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Wow, they should take one of the previous versions of this topic and make it a sticky.

When the weather gets descent, I am going to the Chevron Delo ELC. It is the only one I could find in town that is not pre-diluted. It's not cheap at $21 gallon, but it has an 8 year life.
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Old 01-30-2008, 12:01 PM   #9 (permalink)
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Or maybe a list of acceptable brands sorted by type in the FAQ section.
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Old 01-30-2008, 12:11 PM   #10 (permalink)
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I would use either the factory fill of Motorcraft or I would use Amsoil. If you are changing coolants a flush would be recommended.

Jared
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Old 01-30-2008, 12:43 PM   #11 (permalink)
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I would use either the factory fill of Motorcraft or I would use Amsoil.
Jared
You have to ignore a lot of good coolants to get the list down to those two.
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Old 01-30-2008, 01:46 PM   #12 (permalink)
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I got IH Fleetrite ELC concentrate for $12 a gallon this summer. Try to locate an International dealer nearby.
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Old 01-30-2008, 02:09 PM   #13 (permalink)
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Check the local heavy truck service and parts suppliers. Look for the concentrated ELC's as they will be cheaper than using the pre-mix and you may luck out if they have a sale. I grabbed some Texaco ELC for CDN$16.
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Old 01-30-2008, 07:29 PM   #14 (permalink)
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Be sure to get the concentrated coolant, not the 50% prediluted, if you are going to flush and refill the coolant. There will be some water left in the engine after flushing. This water will dilute the coolant; so if you use 50% to start, the water in the engine will dilute it to less than 50%. You want 50% as the final concentration. Manuals & Warranties Result - Ford

The link above will give you the Scheduled Maintenance Guide, the Owner's Guide, and the Diesel Supplement. On page 36 of the Diesel Supplement, it says that your refill capacity for coolant is 32.75 quarts; so you will need about 16 quarts, or 4 gallons of the concentrate for the refill. Fill the rest with water.
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Old 01-30-2008, 11:35 PM   #15 (permalink)
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flush it, i used distilled water and delo elc. gooch method! gooch approved!
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