Replace the electric coolant pump that circulates coolant through the battery pack and electric motors on the 2022 Rivian EDV 500.

Warnings

Tools required

Parts

• EV coolant pump assembly × 1 — Use OEM specification
• Coolant pump O-rings/gaskets × 1 — Use OEM specification
• Coolant hose clamps (if damaged) × 2 — Use OEM specification

Fluids

• EV Battery/Motor Coolant — 10 qt

Preparation

1. Park vehicle on level surface and engage parking brake
2. Ensure high voltage system has been shut down completely via vehicle interface
3. Disconnect 12V auxiliary battery negative terminal and wait minimum 5 minutes
4. Raise vehicle securely on jack stands to access underbody
5. Remove front undertray panels to access coolant pump area
6. Place coolant drain pan beneath pump location

Procedure

1. 1

   Locate and identify coolant pump
   The EV coolant pump is mounted on the driver side of the front subframe, near the battery pack inlet. Identify the pump assembly, electrical connector, and inlet/outlet coolant hoses. Take photos for reference during reassembly.
2. 2

   Drain coolant system
   Locate the coolant drain valve on the lower radiator connection or use the pump outlet hose as drain point. Open drain valve or carefully loosen lower hose clamp and drain coolant into collection pan. Collect and measure drained coolant for refill reference.
3. 3

   Disconnect electrical connector
   Press the locking tab on the coolant pump electrical connector and carefully pull connector away from pump. Inspect connector pins for corrosion or damage. Secure connector away from work area.
4. 4

   Remove inlet coolant hose
   Using appropriate tool, loosen the hose clamp on the pump inlet connection. Twist hose gently to break seal, then pull hose off pump inlet fitting. Expect residual coolant drainage. Plug hose end to prevent contamination.
5. 5

   Remove outlet coolant hose
   Loosen the outlet hose clamp and remove outlet hose from pump using same technique as inlet hose. Twist to break seal and pull straight off. Allow any remaining coolant to drain into collection pan.
6. 6

   Remove pump mounting fasteners
   Remove the mounting bolts securing the coolant pump to its bracket (typically 2-3 Torx or hex bolts). Support pump while removing final fastener to prevent dropping. Note orientation and position of any spacers or washers.
7. 7

   Remove coolant pump assembly
   Carefully extract the coolant pump from its mounting location, maneuvering around any surrounding components. Inspect mounting area for debris or damage. Remove and discard old O-rings or gaskets from pump fittings.
8. 8

   Prepare new coolant pump
   Unbox new coolant pump and verify part number matches original. Install new O-rings on inlet and outlet fittings, lightly lubricating with coolant. Compare new pump orientation to photos taken during disassembly.
9. 9

   Install new coolant pump
   Position new pump into mounting bracket, aligning mounting holes. Install mounting bolts and tighten in a cross-pattern to manufacturer specifications. Ensure pump is seated properly and not binding.
10. 10

    Reconnect coolant hoses
    Install inlet hose onto pump inlet fitting, ensuring full engagement over fitting barb. Install new or reused hose clamp and tighten securely. Repeat process for outlet hose. Verify both hoses are properly seated before tightening clamps.
11. 11

    Reconnect electrical connector
    Align electrical connector with pump terminals and push firmly until locking tab clicks into place. Gently tug connector to verify secure connection. Inspect for proper seating.
12. 12

    Refill coolant system
    Close any drain valves. Using appropriate fill funnel, add EV Battery/Motor Coolant through the system fill point (typically at coolant reservoir). Fill slowly to allow air to escape. Add approximately 10 quarts or until level reaches proper fill mark.
13. 13

    Bleed air from cooling system
    With fill cap still off, reconnect 12V battery. Use vehicle service mode to run coolant pump in bleed cycle (consult service manual for activation procedure). Add coolant as level drops while pump runs. Continue until no air bubbles emerge and level stabilizes.
14. 14

    Pressure test system
    Install fill cap and bring vehicle to ready state. Allow coolant pump to run through normal operation cycle. Monitor for leaks at pump connections and hose clamps. Check coolant level after pump shuts off and top off if needed.

Reassembly

1. Reinstall front undertray panels removed during preparation
2. Lower vehicle from jack stands
3. Verify all tools and materials are removed from work area
4. Top off coolant reservoir to proper level after system has fully cycled

Verification

• Start vehicle and verify no warning lights related to cooling system appear on dashboard
• Monitor coolant temperature through vehicle interface to confirm proper thermal management operation
• Perform visual inspection under vehicle for coolant leaks at pump and hose connections
• Test drive vehicle and monitor for proper cooling system operation under load
• Recheck coolant level after test drive and top off if necessary
• Verify coolant pump operational sound is normal without unusual noise or vibration

More procedures for this vehicle