When you say that engine temp stays cool, how do you know? If it is by the factory temp gauge, on my 2000 it only showed about 1/3 of the way up the gauge. There were two marks, one about 1/3, one about 2/3 of the sweep of the gauge. Mine always ran right at the lower 1/3 mark or just a hair above. I always thought it looked low (would assume it should be right in the middle) but I guess not.
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