/ $1000 Coolant Change #71
- Sep 29, 2011
- Hurlimann 435, Fordson E27n, Bolens HT-23, Kubota B7200
A real possibility. Silicate drop out sounds exactly what happened to my coolant. What causes the drop out:
These silicates under certain circumstances (coolant with a depleted additive package (worn out coolant), hard water (water mixed with coolant), high coolant temperature, over concentration of coolant (not enough water)) have a tendency towards ?polymerization?, which can cause silicate ?dropout? or ?precipitation? which can lead to gelation of the silicates in the coolant.
See this site for full info: Radiator Antifreeze Plugging
I am not sure why this happened in my case.
Not a very compelling reference, but an example of "it happens"