Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Diesel Engine
The combination water/power steering pump (1) on this vehicle is attached to the lower corner of the cylinder block on the left hand side.
The water/power steering pump (1) cannot be disassembled or serviced separately.
The water/power steering pump (1) is driven by the accessory drive's serpentine belt.
| 1-CONTROL ROD SEALS |
| 2-VACUUM SUPPLY FITTING |
| 3-IMPELLER |
| 4-COOLANT RETURN |
| 5-REGULATING VALVE |
| 6-RETURN SPRINGS |
| 7-EVACUATION ROOMS |
| 8-CONTROL RODS |
| 9-POWER DIAPHRAGM |
| 10-WATER PUMP PULLEY |
The water pump is turned on or off by vacuum. The Powertrain Control Module (PCM) actuates a switchover valve that turns vacuum supply to the water pump piston. A piston slides back and forth covering and uncovering a port used for coolant flow.
The controlling of the coolant flow helps manage temperature throughout the cooling system.
The water pump can be shut off if the following conditions exist:
- Engine speed is not achieved
- The fuel injection quantity in not achieved
- Intake air temperature is not reached
- Coolant temperature is not reached
- The A/C control unit does not request the heating mode
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.