Nissan Armada 2025-2026 Service and Repair Manual: WATER PUMP : Inspection

INSPECTION BEFORE REMOVAL

NOTE:

In case of coolant residue is found on the water pump assembly, check the water pump leakage as following steps.

1. Wipe off the engine coolant residue on water pump assembly.

2. Open the reservoir tank cap.

3. Apply pressure to the cooling system with the radiator cap tester (commercial service tool) (A) and radiator cap tester adapter (commercial service tool) (B).

   

   Testing pressure

   : Refer to RADIATOR : Service Data.

4. Hold pressure for 20 minutes and check the engine coolant leakage from plug or bleed hole.

5. Close the reservoir tank cap.

6. Maintain idling for 20 minutes after engine warm up and stop engine.

7. Check the water leakage around plug , drain hole or bleed hole .

   

8. If engine coolant leakage is found in step 4 or 7, replace the engine water pump assembly.

INSPECTION AFTER REMOVAL

• Check visually that there is no significant dirt or rusting on water pump body and vane .

  

• Check that there is no looseness in vane shaft, and that it turns smoothly when rotated by hand.

• Replace water pump, if necessary.

INSPECTION AFTER INSTALLATION

• Check that the reservoir tank cap is tightened.

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