Genuine Honda Odyssey Water Pump

Honda Odyssey Water Pump Parts Questions & Answers

• Water Pump (Yamada)
  19200-P8A-A02
  Q: How Can You Check the Operation of a Water Pump?

  A: A failure in the water pump can cause serious engine damage due to overheating. There are two ways to check the operation of the water pump while it's installed on the engine. If the pump is defective, it should be replaced with a new or rebuilt unit. Water pumps are equipped with weep (or vent) holes. If a failure occurs in the pump seal, coolant will leak from the hole. With the timing belt cover removed, a flashlight and small mirror are needed to find the hole on the water pump from underneath to check for leaks. If the water pump shaft bearings fail, there may be a howling sound at the pump while it's running. Shaft wear can be felt with the timing belt removed if the water pump pulley is rocked up and down with the engine off. Drivebelt slippage, which causes a squealing sound, should not be mistaken for water pump bearing failure. Even a pump that exhibits no outward signs of a problem, such as noise or leakage, can still be due for replacement. Removal for close examination is the only sure way to tell. Sometimes the fins on the back of the impeller can corrode to the point that cooling efficiency is hampered.
• Water Pump (Yamada)
  19200-RDV-J01
  Q: How to replace a water pump on Honda Odyssey?

  A: Disconnect the cable from the negative battery terminal. Drain the cooling system. If the coolant is relatively new or in good condition, save it and reuse it. Remove the drivebelts. Remove the timing belt, and remove the timing belt tensioner. Remove the bolts and detach the water pump from the engine. Check the impeller for evidence of corrosion or missing fins. Clean the bolt threads and the threaded holes in the engine to remove corrosion and sealant. Compare the new pump to the old one to make sure they're identical. Remove all traces of old gasket sealant and O-ring from the engine. Clean the engine and new water pump mating surfaces with lacquer thinner or acetone. Apply a thin layer of RTV sealant to the 0-ring groove of the new pump, then carefully set a new 0-ring in the groove. Carefully attach the pump to the engine and thread the bolts into the holes finger tight. Use a small amount of RTV sealant on the bolt threads, and make sure that the dowel pins are in their original locations. Install the remaining bolts. Tighten the bolts in 1/4-turn increments. Don't over-tighten the bolts or the pump may be distorted. Reinstall all parts removed for access to the pump. Refill and bleed the cooling system and check the drivebelt tension. Run the engine and check for leaks. Reconnect the battery.