Genuine Chevrolet Astro Water Pump

Chevrolet Astro Water Pump Parts Questions & Experts Answers

• Water Pump Kit
  19417097
  Q: What are three ways to check the operation of the water pump while it's installed on the engine for Chevrolet Astro?

  A: Water pump failure can lead to engine overheating and serious damage. There are three ways to check the operation of the water pump while it's 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, a pressure surge should be felt upon releasing the hose. Secondly, check for leaks in the weep holes located at the top and bottom of the water pump snout. If coolant is leaking from these holes, it indicates a seal failure and the water pump should be replaced immediately to prevent shaft bearing failure. Additionally, an improperly tensioned drivebelt can cause premature wear of the water pump impeller shaft bearing. If a high-pitched squealing sound is heard from the water pump during engine operation, it signifies shaft bearing failure and the water pump should be replaced promptly. Lastly, excessive bearing wear can be identified by grasping the water pump pulley and attempting to move it up and down or from side to side. If the pulley can be moved in either direction, it indicates that the bearing is nearing the end of its service life and the water pump should be replaced.
• Engine Coolant Pump Kit
  89060527
  Q: How do you remove the water pump on Chevrolet Astro?

  A: To remove the water pump, start by disconnecting the cable from the negative terminal of the battery. On 1995 and earlier models, remove the hood latch mechanism. Drain the coolant from the Radiator and, on 1996 and later models, remove the air cleaner assembly and intake duct. Detach any hoses or wiring attached to the upper fan shroud and remove the upper fan shroud. Remove the drivebelt(s) and disconnect the hoses from the water pump, cutting them if necessary. Remove the engine cooling fan and clutch, as well as any brackets necessary for access. Remove the water pump-to-engine block bolts and tap the pump with a soft-faced hammer if it is stuck. For installation, use a gasket scraper to remove old gasket material and clean the mating surfaces with lacquer thinner or acetone. Coat both sides of the gasket(s) with RTV sealant and place it onto the water pump. Coat the threads of each water pump mounting bolt with RTV sealant and insert them into the pump. Tighten the bolts in a criss-cross pattern to the specified torque. The remaining steps are the reverse of removal. Refill the cooling system, run the engine, and check for leaks.