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Chevy 305 Engine Oil Pump Replacement

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This guide is intended for use on engines already removed from the vehicle. While this kind of work may be possible to complete with the engine still in the car, it will be much easier with the engine removed.

The oil pump serves the purpose of generating the oil pressure needed in order to circulate oil through the car. Without a properly performing oil pump you will not have a successful running engine.

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  1. Chevy 305 Engine Oil Pump Replacement, Oil pump: crwdns2935265:01crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 Chevy 305 Engine Oil Pump Replacement, Oil pump: crwdns2935265:01crwdnd2935265:02crwdnd2935265:02crwdne2935265:0

    • Remove the 18 bolts holding the oil pan in place using the 3⁄8 and 1⁄2 sockets, 6 inch extension and 3⁄8 ratchet.

    • Fourteen 3/8 bolts around the perimeter and four 1/2 bolts on each corner

    • Lift the oil pan up and forward so the oil pump pick up will clear the baffle.

    • Do not remove the oil pan gasket yet.

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  3. Chevy 305 Engine Oil Pump Replacement: crwdns2935265:02crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 Chevy 305 Engine Oil Pump Replacement: crwdns2935265:02crwdnd2935265:02crwdnd2935265:02crwdne2935265:0

    • Remove the single 9/16 bolt holding the oil pump in place.

    • Using a rubber mallet to break loose, gently tap on the side of the base of the pump indicated by the arrow. DO NOT HIT THE TOP OF THE PICK UP TUBE AND SCREEN. This can potentially damage the pick up tube or screen.

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  4. Chevy 305 Engine Oil Pump Replacement: crwdns2935265:03crwdnd2935265:01crwdnd2935265:01crwdne2935265:0

    • Pull straight up from the base of the oil pump to remove.

    • Replace with a new oil pump.

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To reassemble your device, follow these instructions in reverse order. Torque oil pump bolt to 60-70ft.-lbs. Torque oil pan bolts to 12ft.-lbs.

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Joey Barton

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University of Memphis, Team S4-G3, Kim Fall 2019 crwdns2935289:0University of Memphis, Team S4-G3, Kim Fall 2019crwdne2935289:0

UM-KIM-F19S4G3

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