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**dmjlambert** · 03-31-2018, 11:10 PM

"additive that can be added periodically" -- that would be any high quality coolant such as Prestone, it has corrosion inhibitors that wear out after 2 years. I added that zinc rod drain plug just as an extra measure. One thing I've noticed with my high concentration of coolant is the level of coolant in the coolant reservoir does not change at all with the engine hot or cold. No boiling, no expansion, and all the air is burped out of the main system.
I think it would be good to hear if anybody is doing anything to reduce external corrosion, other than painting the whole thing including the fins.

03-31-2018, 11:10 PM	#37
dmjlambert Senior Member Join Date: Apr 2016 Location: Cypress, TX Posts: 3,581	Re: Aluminum radiator "additive that can be added periodically" -- that would be any high quality coolant such as Prestone, it has corrosion inhibitors that wear out after 2 years. I added that zinc rod drain plug just as an extra measure. One thing I've noticed with my high concentration of coolant is the level of coolant in the coolant reservoir does not change at all with the engine hot or cold. No boiling, no expansion, and all the air is burped out of the main system. I think it would be good to hear if anybody is doing anything to reduce external corrosion, other than painting the whole thing including the fins. Last edited by dmjlambert; 03-31-2018 at 11:58 PM. Reason: ...if anybody is doing anything to reduce external corrosion