Chevrolet 19168611 Engine Coolant Pump Kit

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

If the weep hole is leaking, the water pump should be replaced immediately.

Water pump failure can lead to engine overheating and serious damage. There are three ways to check the water pump's operation while it is installed on the engine. Firstly, start the engine and warm it up to normal operating temperature, then squeeze the upper radiator hose. If the water pump is functioning properly, you should feel a pressure surge when releasing the hose. Secondly, inspect the weep hole in the water pump snout for coolant leakage, as this indicates a seal failure and impending shaft bearing failure. If the weep hole is leaking, the water pump should be replaced immediately. Thirdly, listen for a high pitched squealing sound coming from the water pump during engine operation, as this indicates shaft bearing failure. If such noise is present, the water pump should be replaced. Additionally, to identify excessive bearing wear before failure, try to move the water pump pulley horizontally or vertically. If there is movement, the bearing is nearing the end of its service life and the water pump should be replaced.

Disconnect the negative cable from the battery. Drain the coolant. Loosen the fan pulley nuts/bolts and remove the drivebelt. Loosen the hose clamps for the lower radiator hose and disconnect the hose from the water pump. On 7.4L VB models, disconnect the coolant bypass hose from the water pump. Remove the fan assembly and water pump pulley. Remove all brackets that attach to the water pump. Loosen the components so that the brackets can be moved aside and the water pump bolts removed. Remove the mounting bolts from the water pump and detach it from the block. Grasp the water pump and rock it back and forth to break the gasket seal. Installation: Clean the sealing surfaces on both the 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 block mounting surfaces and install new water pump gaskets. Apply a thin layer of RTV sealant to the water pump 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 drivebelt and tighten the fan mounting nuts securely. Add coolant to the specified level. Connect the cable to the negative terminal of the battery. Start the engine and check the water pump and hoses for leaks.