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cooling system adjustments
I had an 85% lower grill block with the original radiator, 77/170 degree thermostat, and the coolant temp was getting way too high when going up hills.
I changed to a 66% lower grill block, put in a dual core extra capacity radiator, 82/180 degree thermostat, and now the coolant stays in a very comfortable narrow range, reaching a max of 97/206 at the top of long steep hills on hot days.
The old radiator was thin, beat up and falling apart. I put a screen in front of the new one, and periodically take it out to brush off the bugs. The larger lower grill opening combined with keeping the radiator fan off has resulted in the mileage increasing. This took some experimentation to accomplish, which was well worth doing to get the results.
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