GMC 19168609 Engine Coolant Pump Kit

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Clean the sealing surfaces on both the engine block and the water pump.

You can listen for a high pitched squealing sound coming from the water pump during engine operation. This indicates shaft bearing failure.

After installation, coolant should be added to the specified level, the engine should be started, and the coolant level should be checked. It is important to bleed the cooling system of air and check for any coolant leaks around the water pump and hoses.

Clean the sealing surfaces on both the engine block and the water pump. Wipe the mating surfaces with a rag saturated with lacquer thinner or acetone. Apply a thin layer of RTV sealant to the engine block's mounting surfaces and install new water pump gaskets. Apply a thin layer of RTV sealant to the water pump's mounting surfaces. Place the water pump in position and install the bolts and studs finger-tight. Work carefully so the gaskets don't slip out of position. Remember to replace any mounting brackets secured by the water pump mounting bolts. Install the water pump pulley and fan assembly and tighten the pulley nuts by hand. Install the lower radiator hose, heater hose, and hose clamps. Tighten the hose clamps securely. Install the drive belt and tighten the fan mounting nuts securely. Add coolant to the specified level in the cooling system. Connect the cable to the negative terminal of the battery. Start the engine and check the water pump and hoses for any signs of leaks.

Water pump failure can lead to engine overheating and serious damage.

The effectiveness of the water pump can be checked by removing it for examination, as the impeller fins may corrode away.