Question on cooling fluid
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Elder User
Joined: Mar 2005
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From: Denison, Tx
Question on cooling fluid
Just thinking about the recomended flushing of cooling system. If you tested coolant and it showed nitrite, molybdate and glycol all within limits and then you strained it thru some fine filter and found no sand grit why change the coolant?
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The Gold coolant has silicates in it for cavitation erosion/corrosion control. These can get depleted with time and exposure to temperature (also with exposure to combustion gasses). Some of the "casting sand" folks find is no doubt some of the silicates coming out of solution. When it does, you have less protection from cavitation damage - primarily around the water pump.
I certainly don't know the levels that are good and thse that are bad. However, I do know that heat will deplete the additives. I think the EGR cooler plays a role in that - especially if the oil cooler starts getting plugged.
Personally, I would be conservative and flush it at 50k regardless what the analysis looked like. I do not know if that is overkill or not. I know it helps, just don't know how much.
I certainly don't know the levels that are good and thse that are bad. However, I do know that heat will deplete the additives. I think the EGR cooler plays a role in that - especially if the oil cooler starts getting plugged.
Personally, I would be conservative and flush it at 50k regardless what the analysis looked like. I do not know if that is overkill or not. I know it helps, just don't know how much.
