Chevy 305 Engine Oil Pump Replacement

Introduction

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.

What you need

Step 1 Oil pump

Chevy 305 Engine Oil Pump Replacement, Oil pump: step 1, image 1 of 2

Chevy 305 Engine Oil Pump Replacement, Oil pump: step 1, image 2 of 2

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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Step 2

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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