Chevrolet 94854231 Water Pump Assembly

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Two methods exist to check for water pump failure if it is installed on the engine. Any one of these quick checks indicating water pump failure should be replaced as soon as possible. A leak of coolant from the car beneath will indicate seal failure and imminent shaft bearing failure through the weep hole of a water pump. Another sign of possible bearing wear is if you hear a high-pitched squealing sound emanate from the water pump while the engine is running, and this requires immediate replacement of the water pump. To check for excessive bearing wear before it occurs, try moving the water pump pulley either horizontally or vertically: if there is any movement, it means that the life of the bearing is nearly over and that a new water pump needs to be installed. In removing it first disconnect negative battery cable and drain radiator. After that remove engine cooling fan and radiator shroud to get access to water pump. Depending on model, year, equipment loosen adjusting and pivot bolts on wiper motor, air pump, alternator, air conditioning compressor, power steering pump etc., remove drivebelts from water pump pulley. Unbolt all mounting brackets that are connected with water pumps such as air pumps, alternators, air conditioning compressors and power steering brackets too. Further disconnect lower radiator hose at heater hose and bypass hose at water pump. Finally remove remaining bolts securing water pump to engine or front cover; then gently break gasket seal by rocking or tapping housing with hammer. On installation clean gasket surfaces thoroughly using gasket scraper or putty knife so as to eliminate any traces of old gasket material when transferring fittings and studs to new water pumps on front cover reattach new gaskets using thin coat of gasket sealant bolt new onto old loosely until all brackets are reinstalled in their original positions on water pumps tighten specified torque reassemble components reverse order removal ensure secure fastening adjust deflection based upon pulley center-to-center distance typically determines appropriate tension all drivebelts start engine and watch for leaks as upper radiator hose warms refill with correct antifreeze-water mixture reconnect negative battery cable maintain coolant level in reservoir during initial miles of driving.