Replacing the fuel pump in a small-block Chevy engine
From Crankshaft Coalition Wiki
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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 lobe on it that causes the fuel pump push rod to move in and out- it is what makes the pump, "pump". Total travel of the pump rod is about 0.394' (10 mm). This lobe 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. | + | The camshaft has a lobe on it that causes the fuel pump push rod to move in and out- it is what makes the pump, "pump". Total travel of the pump rod is about 0.394' (10 mm). This lobe needs to be positioned in such a way that the rod is furthest back, away from the pump (distributor rotor between firing position one and two and the fuel pump push rod should be on the cam base circle). 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, remember just finger tigth or you'll bend and or nick the push rod. | 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, remember just finger tigth or you'll bend and or nick the push rod. | ||
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