cucvrus
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I also want to mention that minor leaks in head gaskets can make a 6.2 run cooler. I know from experience. it just seemed to get a little worse over a 5 year period. But I have seen a great increase in heat inside the cab since I changed my head gaskets and radiator. That seems to hold true on other vehicles. I am NOT saying that is the problem for everyone. But it was on 2 CUCV's I had. Happy Holidays. Pressure test the system real well.