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Still waiting for the long muffler to arrive, the resonator is already here. I drained the antifreeze, refilled with water and flushed three times. Did not get more than a few flakes out, so it is clean. Then filled with water, made certain the radiator shutters were wide open and drove 10 miles in 95 degree heat. I checked the temp. several times and it stayed at 181 degrees just as before. I can now check these off and wait for the muffler. Doug