Quote:
Originally Posted by Gooch
Snakyjake, you don't need a coolant filter with HD ELC. They are silicate-free. Just make sure you do a complete flush of the system. I have some good instructions here:
Coolant changing instructions...
Of course a coolant filter is always a good idea...in any cooling system. 
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For verification....I ask the question because the SCA's adhere to the cylinders to protect from cavitation. As cavitation happens, the SCA's are sacrificed instead of the metal. It is the sacrificed SCA's (silicates) that then circulate through the cooling system. This is why a coolant filter is necessary....at I assume.
So after the flush, I assume the SCA's are still adhering to the cyclinders, and other surfaces. If cavitation continues, then silicates will reappear in the cooling system, and will need to be filtered or eventually flushed. However, if ELC stops cavitation, then the SCA's will remain adhered to the cyclinders.
Or perhaps the remaining SCA's adhering to the cylinders is extremely small amount, and wouldn't be enough to do any real harm for a very long time.