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 | 6-RETURN SPRINGS |
| 2-VACUUM SUPPLY FITTING | 7-EVACUATION ROOMS |
| 3-IMPELLER | 8-CONTROL RODS |
| 4-COOLANT RETURN | 9-POWER DIAPHRAM |
| 5-REGULATING VALVE | 10-WATER PUMP PULLEY |
The water pump is turned on or off by vacuum. The ECM (Engine Control Module) 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
NO RELATED
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.