Editing Replacing the fuel pump in a small-block Chevy engine
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− | There are two holes in the passenger side front of the engine. The top bolt hole will align with the fuel pump push rod and will have a 3/8" x 3/4" bolt in it. | + | There are two holes in the passenger side front of the engine. The top bolt hole will align with the fuel pump push rod and will have a 3/8" x 3/4" bolt in it. |
− | This bolt needs to be removed and a longer 3/8" bolt installed in its place | + | This bolt needs to be removed and a longer 3/8" bolt installed in its place. |
The longer bolt is to gently hold the fuel pump push rod in the retracted position- pushed in towards to center of the engine. | The longer bolt is to gently hold the fuel pump push rod in the retracted position- pushed in towards to center of the engine. | ||
− | The camshaft has a | + | The camshaft has a cam on it that causes the push rod to move in and out- it is what makes the pump, "pump". This cam needs to be positioned in such a way that the rod is furthest back, away from the pump. While this isn't absolutely necessary (I'd try it first with out rotating the engine), it can make installing the pump a little easier. |
− | So, with the longer bolt in the upper hole, carefully tighten the bolt until it contacts and holds the push rod from sliding back out against the spacer plate | + | So, with the longer bolt in the upper hole, carefully tighten the bolt until it contacts and holds the push rod from sliding back out against the spacer plate. |
Remove the fuel lines, plug them to prevent dirt from entering. | Remove the fuel lines, plug them to prevent dirt from entering. | ||
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Once the fuel pump mounting bolts are started, tighten them evenly (one side then the other) until the pump meets the spacer. | Once the fuel pump mounting bolts are started, tighten them evenly (one side then the other) until the pump meets the spacer. | ||
− | DO NOT forget to remove the longer bolt holding the push rod. Replace the original bolt into the same hole, with a little sealer on the threads. | + | DO NOT forget to remove the longer bolt holding the push rod. Replace the original bolt into the same hole, with a little sealer on the threads. IF THE SMALLER 3/8" X 3/4" BOLT IS NOT PUT BACK INTO THE ENGINE BLOCK. AS THE FUEL PUMP PUSH ROD TRAVELS UP AND DOWN TO ACTIVE THE FUEL PUMP. THE ENGINE OIL PUMP WILL VERY QUICKLY PUMP OUT ALL OF THE ENGINE OIL. IF NOT CAUGHT BEFORE THE OIL IS DEPLETED, YOU CAN SAY GOODBYE TO YOUR ROD AND MAIN BEARINGS. AND THE ENGINE WILL NEED TO BE OVERHAULED. ESPECIALLY IF DRIVING AT HIGHWAY SPEEDS. |
Reattach the fuel lines- do not use teflon tape. | Reattach the fuel lines- do not use teflon tape. | ||
[[Category:Engine]] | [[Category:Engine]] | ||
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