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JD HyGuard and additive

D

David G

Well-known Member
I am planning to change the antifreeze on my Ford 6610 this fall, and use the HyGuard in everything.

Do I need to add anti-cavitation additive to the new antifreeze?
 
CoolGard is the name of Deere's coolant. Deere makes coolant test strips, cheap and they will tell you if conditioner is needed. With new coolant conditioner generally is not needed but test to make sure.
 
No. The additives are to replenish what is there originally as time go's by. You do need distilled water though.
 
In a word.... YES. Use DCA4 additive. I'd be a lot more worried about that than bothering with distilled water. All Ford Basildon engines up to the Genesis redesign in 1991 (where they shortened the water jacket and added an internal tie bar) have a proclivity to have ultrasonic vibrations that cause cavitation in the coolant... and those air bubbles cause erosion and pinholing of the cylinder walls. So use the bloody additive, regardless of what coolant you're running. That, along with coolant conditioning filters was the principle recommendation Ford made at the time until the block was fully redesigned. Just use it... just because.

Rod
 
Deere coolant already has the additive. Hard to imagine anything needing more than a NG Deere but I've been wrong before.
 
If it is John Deere pre mix you have all the additives right in the coolant for cavitation protection and the water is ionized (or what ever they call it) so you definitely do not add water or additive package to it . After it is in use you test with test strip to see if additive package has been depleted or contaminated and then you may need additional additive. If it is concentrate,(don't know if Deere even sells that anymore), then you may very well need the additive and distilled water, or water from dehumidifier is acceptable.
 

JD states Cool Gard ll is good for 6 yrs

30094.jpg
 
As others have said, Coolguard II is a fully formulated diesel coolant. Something to know about it though is Coolguard II is an OAT coolant. It is made with a different chemistry than the older SCA coolants. When the time comes for adding the replenishing additive, make sure you use the proper one.

You want to avoid mixing the two coolants if possible.
 
Rod, you are almost right. The "bubbles" are not "air" bubbles, but are actually small vacuum cavities. During vibration, when they collapse the fluid itself "hits" the wall and causes the destruction. Tom
 
Yeah, that's a convoluted way of saying the same damn thing.... there is a void which creates the erosion. It is my recollection that it is actually the bubble that does the damage in these engines, not the coolant. That may vary in other engines with wet sleeves... but as far as I know this pin holing was unique to Ford in terms of parent bore engines.
And if others want to screw around and not use additive, go right ahead. It's not me buying a 2k dollar block for them.

Rod
 
No need to get all up tight and argue, but it is not saying the same thing. You said an "air" bubble; but there is no air in there. It is a vacuum bubble, and when it collapses, the coolant suddenly hits the metal block/sleeve and finally cuts a hole through it. The additive protects against this, and I agree that you should use it. I was not implying in any way that you should not use the proper anti-cavitation additive. Regards. Tom
 
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