Review on Gates 43541 Premium Engine Water Pump: Enhance Your Vehicle's Cooling System Performance by Matt Charlton

To be clear as the reviews say both, this pump arrived on 04/17/2019 with a plastic impeller as stated in the product description. This is a very good pump, as good as it gets. receive. Remember that if the bearing fails, the metal impeller will destroy your front cover. As for the plastic impellers, that's stupid. If your cooling system has so much dirt in it that the impeller is worn out or physically damaged, you're in big trouble. If you have corrosion in your cooling system I cannot say enough good things about Thermocure. Follow some advice and flush the system with water before use, and you only need one container. Since at 6.0 only about 50% of your coolant is drained due to the removal of the lower radiator hose, be prepared for about 15 flushes, the last two with distilled water, then 4 gallons of fresh coolant, not a 50/50 premix, since You're on the block another 3+ gallons of water. Be sure to leave the heater on to keep the bypass valve open. It usually doesn't close until the AC is running at maximum, but plan for success. You should replace the fan clutch at this point. Yes they are expensive but if you have 100,000 miles you will fail. Especially since you probably flushed the bearing with a leaking water pump.