Quote:
Originally Posted by mechman600
Putting a grill block does nothing except allow less heat to escape from the engine block itself. I'd say the difference will be barely noticeable if at all.
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Experiment trumps theory. Get a car with a ScanGauge (so you can see exact temperature, rather than the ballpark estimate of most OEM "gauges"), try driving with and without radiator block, see how long it takes the engine to warm to operating temperature.
As I said above, it works in my Insight, but YMMV.