2005 6.0 Powerstroke :: Coolant Flush Problems - Diesel Forum - TheDieselStop.com
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6.0L Power Stroke Engine and Drivetrain Discussion of the 6.0L Power Stroke diesel engine and drivetrain in the 2003-Up Super Duties 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 6.0L Power Stroke engine.

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Old 03-05-2011, 05:19 PM   #1 (permalink)
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2005 6.0 Powerstroke :: Coolant Flush Problems

I recently bought this truck and I have no records of the maintenance so I've decided to just go through everything and replace all of the fluids and filters myself. Today I'm on the coolant flush but I've ran into a puzzling problem. Unfortunately for me, the dealerships are closed so I can't take it down there.

I followed this guys procedures on powerstrokehelp.com:


Everything went fine, but now that I'm filling up the system it has only taken 2.5 gallons of coolant and I haven't even added the distilled water. The system holds approx. 6 gallons so I'm wondering why I'm not even half way and the bottle says it's filled.

When I emptied the old coolant into some gallon jugs from the pan, it only filled up 2.5 gallons as well.

I'm sure some coolant/water stays in the system for the flushes, but how much? No way it's 3.5 gallons right?
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Old 03-05-2011, 05:51 PM   #2 (permalink)
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Did you drain the block as well?
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Old 03-05-2011, 06:38 PM   #3 (permalink)
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Quote:
Originally Posted by ralderman View Post
Did you drain the block as well?
There are plugs just below the exhaust manifold on each side you need to remove them to drain the block
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Old 03-05-2011, 07:10 PM   #4 (permalink)
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Thanks for the speedy replies guys.

Quote:
Originally Posted by paintingman View Post
There are plugs just below the exhaust manifold on each side you need to remove them to drain the block
So you're saying the block holds the rest of the coolant/di water? After flushing the system a few times, it looked like the coolant was 99% gone and just distilled water sitting in there. The entire system would've been flushed whether or not I drained the block as well.

If the block and the rest of the system hold a few gallons, there was already that much distilled water sitting in there that didn't drain from radiator fitting.

Does this sound right?
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Old 03-05-2011, 09:37 PM   #5 (permalink)
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The clean water would be Ok if your using strait coolant. if your using 50/50 premix you may want to drain it all
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Old 03-05-2011, 11:09 PM   #6 (permalink)
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Quote:
Originally Posted by paintingman View Post
The clean water would be Ok if your using strait coolant. if your using 50/50 premix you may want to drain it all
No this is the Motorcraft Premium Gold shown in the video, and it's straight coolant unmixed.

Thanks.
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Old 03-06-2011, 12:27 AM   #7 (permalink)
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Staaaay away from the crap Ford Gold Collant! The silicates in the coolant is what causes oil coolers to plug ruining your EGR cooler! Do some research and you'll find a lot of guys using a ELC (Delo) extended life coolant. Flush with 'Restore' and 'Restore plus'(cummings product) or 'VC-9' (ford product). You need to do a serious flush to get rid of ALL the ford gold coolant. If you have a couple hundred bucks do yourself and your PS a huuuge favor and get a coolant filter. Dieselsite.com has them at a good price! The Delo ELC is not that easy to find but with a little hunting in your home town you'll find some. Let me know if you can't find any further info on this....

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Old 03-06-2011, 05:36 AM   #8 (permalink)
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The total system coolant capacity is 27.5 quarts, and yes - it will hold a lOT, so flushing w/ distilled water is very wise.
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Old 03-06-2011, 06:21 AM   #9 (permalink)
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I've ordered 30 gallons of distilled water (for less than a buck a gallon) for when I do my flush. I don't have county water, I have a well with 2 sediment and a carbon filter and with all the minerals in the water, particularly lime scale, I don't want them in my engine block, water pump, radiator, and cooling system. But that's just me. To each his own.

Oh, yeah, and I'm not putting the gold c**p back in. Delo or Rotella ELC
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Old 03-06-2011, 01:28 PM   #10 (permalink)
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You may not want to use the motorcraft the guy's have been finding out that the silica over time turns into gel and clogs the oil cooler. the best flush is the restore then use a silica free coolant everyone has a brand they like or say it's the best as long as it's ELC silica free i like this one AMSOIL Propylene Glycol Antifreeze and Engine Coolant - ANT
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Old 03-06-2011, 02:52 PM   #11 (permalink)
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If you use the Ford Gold coolant, go ahead and order a new oil cooler, Egr cooler, head studs and new gaskets. Or you could use the ELC and add the coolant filter.
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Old 03-06-2011, 04:29 PM   #12 (permalink)
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I just ordered a case (6 gals) of Shell Rotella ELC concentrate coolant from Amazon.com An Ace hardware in NY sells it through them. With delivery to NM it is $ 140.00 or about 24.00 a gallon.
I only need 4 gals but they only sell it by the case and it can not be found locally so I will have 2 extra gallons in reserve
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Old 03-06-2011, 06:08 PM   #13 (permalink)
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Sweet! Thanks for all of the info guys.

I tested out the coolant today and it was dead center. So looks like I'm good!

I've done some research on the motorcraft premium gold, but I've also read some stuff that says the silicates aren't enough of a problem to even worry about.

This 6.0 has 116xxx on it right now, so I'm currently saving for a new egr cooler from bulletproof diesel, plus the install. That's not something I want to do myself, so I'm gonna pay the money to have it done right. At that point I will switch to the coolant everyone is recommending. But for now I'm sure this ford stuff with be fine.
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Old 03-06-2011, 07:08 PM   #14 (permalink)
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Quote:
Originally Posted by kmaccullough View Post
I've done some research on the motorcraft premium gold, but I've also read some stuff that says the silicates aren't enough of a problem to even worry about.
X2
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Old 06-16-2014, 10:50 AM   #15 (permalink)
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I have a 2005 F350 6.0 in top condition.I want to do a flush.How many gallons or quarts of coolant will I need to replace? Please reply.....GruntAshua
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