I think it's unlikely that the radiator suddenly clogged to cause your
problem, especially in the "cool" weather you describe, and with the
Gano. My guess would be a failing thermostat. The slow warmup would not
happen if the Gano was clogged. Does it seem to stabilize for a bit at
your normal thermostat temperature, or does the gauge just continue on
upward? A pause would indicate some thermostat activity, but if it just
continues up without stopping, then the thermostat may be frozen.
When my heater core leaked, I had green water dripping down by my
passenger's feet. As for anywhere else it might be going....How does
your oil look? Is the quantity going up?
Stu
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