On Father's Day (2020), I bought my 1968 Plymouth Satellite. The owner had recently (2 months previously) replaced the water pump because he said he was getting too much coolant from the weep hole. He bought a NAPA (Gates brand 40030?) and installed it. I bought it and after 130 miles, there was a BANG and the impeller came loose. The belts came off as the water pump pulley wobbled loose. My first repair on my 'new' car was to replace it. NAPA warrantied the pump and I then put on a new (not rebuilt) water pump. I used RTV on the pump (not block) and the gasket. Also RTV on the threads of the long bolts. Torqued in a cross pattern and reinstalled everything else (alternator/steering pump). Everything has been good, but last night I took my wife for ice cream and parked the car in the shop afterwards. This morning there was about 3/4 gallon of coolant on the floor (i confirmed by checking the radiator level). I checked the tightness on the water pump mounting bolts and none were loose. It looks like the weep hole is dripping (not happened for me yet on this new pump). I understand that a few drop is normal, but this is WAY more. I'm guessing the second new pump seal is bad and I'm planning on contacting NAPA about it. Just wanted to see if anyone had any other insight before I start complaining. Also, if Gates is crap, what brand pump should I be using? I'm not looking to do an electric pump at this point. FYI: the engine is the original 318 that has been stroked to an approx 390 with edelbrock aluminum heads, weiland aluminum intake and was professionally done in CO in 2016 (i have the receipts). Estimated hp was 400-450 in case that helps. No i didn't go crazy on the way to get the ice cream, just a nice cruise. Thanks for any help!