E99 coolant flush - Ford Powerstroke Diesel Forum
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Old 04-06-2013, 12:43 AM
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E99 coolant flush

So I am considering flushing the coolant soon and have been trying to read up on it. I found a few write ups on it and plan to buy the napa coolant flush kit. The one thing I'm not clear on is the type of coolant required for the early 99 engine. I was reading that the early models have different requirements than late 99 and newer. What exactly should I be looking for? Any other tips on this is appreciated.
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Old 04-06-2013, 04:57 AM
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Quote:
Originally Posted by MOSTWANTED View Post
So I am considering flushing the coolant soon and have been trying to read up on it. I found a few write ups on it and plan to buy the napa coolant flush kit. The one thing I'm not clear on is the type of coolant required for the early 99 engine. I was reading that the early models have different requirements than late 99 and newer. What exactly should I be looking for? Any other tips on this is appreciated.
Does the truck have the original injectors?

E99 trucks use a different sealant on the injector cups than the late 99+ and therefore the 2-EHA found in most OAT coolants (like coolants meeting Cat EC-1) can eat the sealant on the cups and cause an injector cup failure.

Now if the truck had its injectors changed there is the possibility they changed the sealant but it is not a sure thing.

For simplicity sake you could get a pre-charged coolant like Fleet Charge or Napa's fleet coolant or you could get some plain old green coolant (meeting ASTM D4985) and add SCA (supplemental coolant additives, designed to fight cavitation aka pitting of the cylinder walls). I like Cummins DCA 4 as an SCA, very effective and you can use less of it compared to a DCA 2 like Napa Kool.

Supplemental Coolant Additives (SCAs)
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Old 04-06-2013, 05:20 AM
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What if I have aftermarket injectors? What kind of sealant are you talking about?
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Old 04-06-2013, 05:29 AM
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Originally Posted by HVAC SuperTech View Post
What if I have aftermarket injectors? What kind of sealant are you talking about?
I would imagine they would have redone the cups..

here is the "new" sealant, I don't even know if they offer the old stuff anymore.

https://www.fcsdchemicalsandlubrican...nd%20Adhesives
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Old 04-06-2013, 06:34 AM
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if you dont no if the cups were replaced, no sense in "finding" out. Stay with, what will work and be done...green, gold.
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Old 04-06-2013, 11:04 AM
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Originally Posted by rufushusky View Post
Does the truck have the original injectors?



For simplicity sake you could get a pre-charged coolant like Fleet Charge or Napa's fleet coolant or you could get some plain old green coolant (meeting ASTM D4985) and add SCA (supplemental coolant additives, designed to fight cavitation aka pitting of the cylinder walls). I like Cummins DCA 4 as an SCA, very effective and you can use less of it compared to a DCA 2 like Napa Kool.

Supplemental Coolant Additives (SCAs)
I assume they are OEM but no way to know for sure. Would this be the safe route to use a pre charged?
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Old 04-06-2013, 11:10 AM
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Quote:
Originally Posted by MOSTWANTED View Post
I assume they are OEM but no way to know for sure. Would this be the safe route to use a pre charged?
IMHO yes.

Some have run elc without issue cause not all elcs have 2-eha.

I know a lot of people have a hardon for elc but in a 7.3 green and gold both work well they just require a little more user input.
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Old 04-12-2013, 08:28 AM
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Quote:
Originally Posted by MOSTWANTED View Post
So I am considering flushing the coolant soon and have been trying to read up on it. I found a few write ups on it and plan to buy the napa coolant flush kit. The one thing I'm not clear on is the type of coolant required for the early 99 engine. I was reading that the early models have different requirements than late 99 and newer. What exactly should I be looking for? Any other tips on this is appreciated.
If it were my truck I would use Fleet guard for the Flush. There's a very detailed Post somewhere on Power stroke on flushing. You should remove the two lower block plugs, the one on the passenger side requires removing the starter. I will see if i can find It. You should add a coolant filter to your rig.
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Old 04-12-2013, 09:08 AM
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Quote:
Originally Posted by RACERX View Post
If it were my truck I would use Fleet guard for the Flush. There's a very detailed Post somewhere on Power stroke on flushing. You should remove the two lower block plugs, the one on the passenger side requires removing the starter. I will see if i can find It. You should add a coolant filter to your rig.
Here you go...

Coolant changing instructions... - Diesel Forum - TheDieselStop.com

Oh if you have a stubby 1/4" drive racket you don't need to remove the starter... it is a tight fit but you can get it in there...
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