How to replace the engine oil pump
Auto repair

How to replace the engine oil pump

09.11.2022 /

The oil pump is the heart of the engine - it pumps vital lubricant and applies pressure to all moving parts. The pump must deliver 3 to 6 gallons of oil per minute while maintaining system pressure.

Most oil pumps are driven by a camshaft or camshaft. The pump itself usually consists of two gears in a tight-fitting housing. When the gear teeth disengage, they leave a space that is filled with oil sucked in through the pump inlet. The oil then enters the space between the gear teeth, where it is forced through the teeth into the oil passage, creating pressure.

If your oil pump isn't working properly, your engine will soon become a giant paperweight. A faulty pump can lead to low oil pressure, lack of lubrication and eventually engine failure.

Part 1 of 3: Prepare the car

Necessary materials

  • Free Repair Manuals - Autozone provides free online repair manuals for certain makes and models of Autozone.
  • Jack and Jack stand
  • Oil drain pan
  • Protective gloves
  • Repair manuals (optional)
  • Safety glasses
  • Wheel chocks

Step 1: Block the wheels and apply the emergency brake.. Park the vehicle on a level surface and apply the emergency brake. Then place the wheel chocks behind the front wheels.

Step 2: Jack up the car and remove the wheels.. Place a jack under a strong part of the frame.

If you have any questions about where to place the jack on your particular vehicle, please refer to the repair manual. With the vehicle in the air, place the jacks under the frame and lower the jack. Then completely unscrew the lug nuts and remove the wheel.

Step 3: Disconnect the negative battery cable.

Step 4: Drain the engine oil.

Part 2 of 3: Remove the oil pump

Step 1: Remove the oil pan. Loosen the oil pan bolts and then remove the pan.

On some vehicles, you will need to remove other items first to gain access to the sump, such as the starter, exhaust pipe, etc.

Step 2: Remove the old oil pan gasket.. Use a gasket scraper if necessary, but be careful not to scratch or damage the oil pan.

Step 3: Remove the oil pump. Remove the pump by unscrewing the bolt securing the pump to the rear bearing cap and remove the pump and extension shaft.

Part 3 of 3: Pump Installation

Step 1: Install the oil pump. To install the pump, position it and the drive shaft extension.

Insert the drive shaft extension into the drive gear. Then install the pump mounting bolt to the rear bearing cap and torque to specification.

Step 2: Install the oil pan. Clean the oil pan and install a new gasket.

Then install the pan on the engine, install the bolts and torque to specification.

Step 3: Fill the engine with oil. Make sure the drain plug is tight and fill the engine with oil.

Step 4: Remove Jack Stands. Jack up the car in the same place as before. Remove the jack stands and lower the car.

Step 5: Remove the wheel chocks.

Replacing an oil pump sounds like a dirty job - and it is. If you prefer someone else to get dirty for you, AvtoTachki offers a qualified oil pump replacement at an affordable price. AvtoTachki can replace the oil pump cover gasket or o-ring at your convenience office or driveway.

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