Cars & Vehicles Auto Parts & Maintenance & Repairs

How to Change an Oil Pump in a Buick LeSabre

    • 1). Open the drain plug on the oil pan underneath the car using a box-end or flare-nut wrench; the plug is at the rear of the pan. Drain the oil into a pan that can hold at least 5 quarts.

    • 2). Unscrew and remove the oil filter--located beside the oil pan--using a filter wrench.

    • 3). Remove the five screws for the oil pump cover using a T-30 Torx driver and then lift off the timing chain cover with the oil pump drive gear and driven gears.

    • 4). Remove the gears from the pump cover.

    • 5). Pack the body of the new oil pump within its cover with petroleum jelly and and install the gears in place, making sure they force the jelly into every cavity.

    • 6). Install the oil pump cover--and the oil pump within it--onto the timing chain cover using the Torx screws.

    • 7). Install a new oil filter under the car, lubricating its gasket with fresh oil; tighten the filter by hand, not with the wrench. You should always replace the oil filter whenever you drain the oil and remove the old filter.

    • 8). Add 4 quarts of fresh engine oil through the engine's filler tube.

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