Replace the water pump on a 2014 Ram 2500 with 6.7L Cummins diesel engine, including coolant drain and refill.

Warnings

Tools required

Parts

• Water pump assembly × 1 — Use OEM specification
• Water pump gasket × 1 — Use OEM specification
• Accessory drive belt × 1 — Inspect and replace if worn

Fluids

• Mopar OAT Coolant (Purple) — 18 qt

Preparation

1. Ensure engine is completely cool to the touch (minimum 2 hours after operation)
2. Park vehicle on level surface and engage parking brake
3. Disconnect negative battery cable to prevent electrical issues
4. Place drain pan under radiator petcock and lower radiator hose
5. Remove engine cover if equipped

Procedure

1. 1

   Drain cooling system
   Slowly remove radiator cap to release any residual pressure. Open radiator petcock at bottom of radiator. Remove lower radiator hose at radiator connection to ensure complete drainage. Allow system to drain completely into collection pan.
2. 2

   Remove accessory drive belt
   Locate the automatic belt tensioner on the front of the engine. Using a socket or belt tensioner tool, rotate the tensioner clockwise to release tension. Slip the belt off the pulleys and carefully release tensioner. Remove belt from engine compartment and inspect for wear, cracks, or glazing.
3. 3

   Disconnect coolant hoses from water pump
   Identify all coolant hoses connected to the water pump housing. Use hose clamp pliers or screwdriver to loosen hose clamps. Twist hoses gently to break seal, then pull off water pump connections. Some residual coolant will drain - keep drain pan positioned.
   Torque spec

   Hose Clamps3 Nm (2 lb-ft)
4. 4

   Remove water pump mounting bolts
   Locate all water pump mounting bolts securing the pump to the engine block or timing cover (typically 4-6 bolts). Remove bolts in a criss-cross pattern to prevent warping. Keep bolts organized as some may be different lengths. Support water pump as final bolts are removed.
   Torque spec

   Water Pump Bolts25 Nm (18 lb-ft)
5. 5

   Remove old water pump and gasket
   Carefully pull water pump assembly away from engine block. If pump is stuck, gently tap with plastic mallet - do not pry against sealing surface. Once removed, use scraper to carefully remove all old gasket material from engine block mating surface. Clean surface thoroughly with shop towels and ensure no debris remains.
   ⚠Do not scratch or gouge the engine block sealing surface as this will cause coolant leaks.
6. 6

   Prepare and install new water pump
   Verify new water pump matches old unit. Place new gasket on water pump or engine block according to gasket design (some have adhesive backing). Align new water pump with mounting holes and carefully position against engine block. Hand-start all mounting bolts before tightening any.
7. 7

   Torque water pump bolts
   Using torque wrench, tighten water pump mounting bolts in a criss-cross pattern to ensure even gasket compression. Start from center bolts and work outward. Perform tightening in two stages: first to 12 Nm (9 lb-ft), then final torque to specification.
   Torque spec

   Water Pump Bolts25 Nm (18 lb-ft)
8. 8

   Reconnect coolant hoses
   Reinstall all coolant hoses onto water pump connections. Ensure hoses are fully seated on connections. Position hose clamps over hose ends and tighten to specification. Verify clamps are positioned correctly and not over hose seams.
   Torque spec

   Hose Clamps3 Nm (2 lb-ft)
9. 9

   Reinstall accessory drive belt
   Route new or inspected belt around all pulleys according to belt routing diagram (typically shown on fan shroud or radiator support). Rotate belt tensioner clockwise and slip belt onto final pulley. Release tensioner slowly to apply proper tension. Verify belt is seated correctly in all pulley grooves.
10. 10

    Refill cooling system
    Close radiator petcock and reconnect lower radiator hose if removed. Using funnel, slowly fill cooling system with Mopar OAT purple coolant through radiator fill neck. Fill until coolant reaches bottom of fill neck. Allow time for coolant to settle and air pockets to escape. Start engine and allow to run until thermostat opens (watch temperature gauge). Add additional coolant as level drops. Fill coolant reservoir to COLD fill line.
    ⚠Add coolant slowly to minimize air pockets in the system. The 6.7L Cummins has a large cooling system capacity.

Reassembly

1. Reinstall engine cover if equipped
2. Reconnect negative battery cable
3. Double-check all hose connections and clamps for tightness
4. Wipe down any spilled coolant from engine and components

Verification

• Start engine and allow to reach normal operating temperature while monitoring for leaks around water pump and hose connections
• Check coolant level in reservoir after engine cools and top off to COLD line if needed
• Verify no coolant leaks are present after 24 hours of operation
• Confirm heater operates properly and produces hot air
• Check that engine maintains normal operating temperature without overheating

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