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 | + | 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 bolt in it. |
− | This bolt needs to be removed and a longer | + | This bolt needs to be removed and a longer 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, hold the push rod with a hack saw blade or your finger, what ever, and carefully tighten the bolt until it contacts and holds the push rod from sliding back out against the spacer plate. |
− | + | If for some reason the hole can not be accessed, an alternative to this is to remove the spacer plate, remove the push rod and put some heavy grease on the cam end of the push rod. This grease will (for a while) hold the push rod to the cam in the retracted position. Reinstall the spacer plate, use a new gasket or RTV to seal it. If (more like when) the push rod slides away from the cam, you can re-stick it a few times before the grease quits working. | |
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− | If for some reason the hole | + | |
With the gasket previously stuck to the fuel pump (use RTV or rubber cement) and the ports and fittings plugged so no dirt can enter, insert the fuel pump arm into the hole in the spacer plate. It helps to start the arm into the hole turned slightly clockwise from straight up, then rotate the pump and arm counter clockwise as you insert it. This will let the arm get in front of the push rod and will start the pump arm to compress if the cam on the camshaft is causing the push rod to be out more than if it was on the lowest part of the cam. | With the gasket previously stuck to the fuel pump (use RTV or rubber cement) and the ports and fittings plugged so no dirt can enter, insert the fuel pump arm into the hole in the spacer plate. It helps to start the arm into the hole turned slightly clockwise from straight up, then rotate the pump and arm counter clockwise as you insert it. This will let the arm get in front of the push rod and will start the pump arm to compress if the cam on the camshaft is causing the push rod to be out more than if it was on the lowest part of the cam. | ||
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Reattach the fuel lines- do not use teflon tape. | Reattach the fuel lines- do not use teflon tape. | ||
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