Do the 6.0 diesels require the SCA additive. I have been adding to mine but was questioning whether it is necessary. A Ford tech that I trust said he has seen no problems without it. Im going to change to Evans coolant anyway and eliminate the need for anything. Just curious about everyones opinion on this subject.

As usual this is the best forum ever created!!!!

 

Go for the Evans. I use it and No problems, no SCA additive

 

From what I understand, adding SCA's unnecessarily can lead to drop-out and contribute to plugging up your cooling system (oil cooler) and subsequent EGR cooler problems. If this is the case, it is definitely not a benign action.

Personally, I converted over to Delo ELC at around 50k. I'm good for a very long time.

Mark

 

For those that have switched to Evans, how did you do it? Simply drain and refill? Did you keep the standard pressurized bottle cap? Inquiring minds WANT to know! Thanks

 

Using the Evans requires a non-pressurized system I believe. I THINK you have to drill a hole in your cap.

No SCA is required in the 6.0's. The coolant is supposed to meet the GA-05 (?) requirement.

 

Yes you drill a hole in the cap. At least I did. I drained flush twice, drained, suck out/blew out all the water I could. Filled with EVAN. I like the no water thing, it has a higher boiling point. I also use a coolant filter. I happy with it.

 

interesting read. what is SCA ? and why do have to have a nonpressurized system for the evans ?

i am going to definitely add a coolant filter, but fill me in on the advantages of switching over the cooling medium ?

 

"Question: Do I need a Zero or low pressure radiator cap with NPG+ ?
Answer: NO. You may use your standard radiator pressure cap. In fact, we recommend a 7lb cap to keep NPG+ from absorbing water from the atmosphere. Some users found they could smell coolant, again a 7lb cap eliminated the issue. NPG+ will still cool your system with industry leading efficiency. Of course if you'd like to run a low pressure or even zero pressure system, you will need to purchase a low pressure cap or modify your existing cap. Please consult our tech pages or instruction guide (or call us) before modifying your existing cap!"
www.evanscooling.com/main23.htm

 

Supplemental Coolant Additive (SCA) adds a sacrificial layer to the cylinder wall so that the cavitation action will act against it instead of against the metal cylinder wall.

Some coolants (Ford Gold) have SCA in the mix and are good for the life of the coolant. Other coolants (Standard Green) do not contain SCA so you must test the coolant with test strips periodically and add SCA.

SCA is added to prevent damage to cylinder liners from cavitation. Cavitation is a localized low pressure zone that forms adjacent to the outer wall of the cylinder. Every time the pistons move up and down, they rock in the bore, causing the cylinder wall to vibrate. Vapor bubbles can form on the outside of the cylinder wall as it moves inward, or away from the coolant, creating a low-pressure area. When the cylinder wall moves outward, or into the coolant, the pressure increases on the vapor bubbles. After many cycles, vapor bubbles continue to form and the pressure on the bubbles increases until, finally, a vapor bubble collapses. When this happens, it creates a localized stress area of more than 50,000 psi. The high pressure and heat created by the implosion removes a small amount of cylinder wall material where the vapor bubble was attached. Over time, the cylinder wall can continue to erode, and eventually may form a pinhole in the wall that allows coolant to enter the combustion chamber, leading to possible engine failure.

Here is the link to Evans, and it can be run pressurized or non-pressurized.
www.evanscooling.com/main23.htm

 

If you have the OEM Ford Gold coolant you do Not need to add SCA's. If you have standard Green coolant then you need to add SCA. The 6.0 SD came from FMC with Ford Gold Coolant.

If you have been adding SCA's to your cooling system, you need to drain and flush your cooling system then refill with new Ford Gold coolant. Use distilled water for the mix not tap water.
Excess SCA's in the coolant can cause the Total Dissolved Solids to be elevated do to excess solder degredation do to the high levels of SCA. This can lead to plugging of coolant passages in the radiator and engine oil cooler. Also to much SCA can cause water pump seals to fail.