How to Replace an Oil Pump in a Oldsmobile Alero

Drive your vehicle up onto ramps or lifts so you have room to work as you pull out the oil pump. You could also use a jack, but make sure you brace the front wheels so they don't roll. In addition, set the emergency break firmly into position so the car doesn't roll.

Take the left front wheel off and remove the engine splash shield and drive belt.

Prevent the crankshaft from rotating while you loosen its balancer bolt by using the holding tool J 38122-A.

Remove the crankshaft balancer bolt, throw it away, and then take the balancer out. Continue disassembly by removing the drive belt tensioner, the water pump-to-front cover bolts, the rest of the front cover-to-engine bolts and the cover and gasket.

Finish the disassembly by removing or disconnecting the oil pressure relief valve, the oil pump cover and the oil pump gears.

Insert your new oil pump and install the oil pump gears and the oil pump cover. You want to tighten the bolts to 53 in-lb. Connect the oil pressure relief valve and tighten its plug to 30 ft-lb.

Reassemble the front engine cover by installing the front cover gasket, cover and cover-to-engine bolts.

Install the water pump-to-front cover bolts and tighten all the bolts to 15 ft-lb. After this, put on the drive belt tensioner and tighten that bolt to 33 ft-lb. Put the crankshaft balancer and bolt on.

Grab the crankshaft holding tool J 38122-A once again to keep the crankshaft from rotating while you tighten the new crankshaft balancer bolt to 74 ft-lb plus 75 degrees.

Put the engine splash shield, the drive belt and the front wheel back on. Start the engine and check for leaks on the parts you installed.