Genuine Saturn LS1 Water Pump

Saturn LS1 Water Pump Parts Questions & Experts Answers

• Water Pump Assembly
  12630084
  Q: How do you remove the water pump on Saturn LS and LS1?

  A: To remove the water pump on 4-Cylinder engines, first disconnect the cable from the negative battery terminal and drain the cooling system. Remove the drive belt, air intake duct, air filter housing, and the exhaust manifold heat shield. Drain excess coolant from the water pump housing and remove the lower radiator hose. On 2004 models, remove the thermostat housing pipe bolt from the front of the engine block and disconnect the ECT harness connector. Detach the heater hoses and remove the thermostat housing mounting bolts, then separate the thermostat housing from the engine block and water pump. Remove the water pump access cover from the engine front cover. Loosen the right front wheel lug nuts, raise the vehicle, and support it securely on jackstands. Remove the right front wheel and fender splash shield. Install a special holding tool onto the water pump sprocket to prevent movement and remove the water pump pulley bolts and the bolts attaching the water pump to the engine block. Clean the bolt threads and threaded holes in the engine and remove any corrosion or sealant, as well as old gasket material. For installation, install a new sealing ring into the groove in the pump and use a guide pin to align the water pump sprocket with the water pump during installation. Tighten the water pump mounting bolts and sprocket bolts to the specified torque. Install the water pump access cover and the thermostat housing and water pipe, lubricating the seal with silicone gel before installation. Complete the remaining installation steps and refill the cooling system, checking for leaks after operating the engine.
• Water Pump Assembly
  12630084
  Q: What are the signs and consequences of a failure in the water pump for Saturn LS and LS1?

  A: A failure in the water pump can lead to serious engine damage due to overheating. If the pump seal fails, coolant will leak either from the engine front cover in four-cylinder models or from the engine timing belt cover in V6 models. It is important to use a flashlight to locate the vent hole on the water pump and check for any leaks. When the engine is off, shaft wear can be felt by rocking the water pump pulley up and down. However, it is crucial not to mistake drive belt slippage, which causes a squealing sound, for water pump bearing failure. A quick check to assess water pump performance is to turn on the heater. If the pump is failing, it may not be able to efficiently circulate hot water all the way to the Heater Core as it should.