The fuel pump is responsible for pulling the gasoline stored within the fuel tank to the front of the vehicle, and then routing that fuel to the fuel delivery system. Over time the seals within the pump tend to break down, resulting in dangerous fuel leaks. Thankfully, replacing the fuel pump on a 350 Chevy engine is fairly simple, as the pump is easy to access and only uses two fuel lines.
Disconnect the fuel lines from the existing fuel pump. The fuel pump is located on the passenger's side of the engine, just below the water pump. Two fuel lines attach to the front of the fuel pump. One fuel line slides over a metal nipple and is secured with a hose clamp. The tip other fuel line bolts into the fuel pump. Loosen the hose clamp with a flathead screwdriver. Pull the first hose off of the fuel pump. Twist the metal tip of the remaining fuel line in a counterclockwise direction until the line is loose. Pull the line away from the fuel pump.
Remove the existing fuel pump by removing the pump's two retaining bolts with a wrench. Pull the pump out of the side of the engine.
Remove any remaining gasket material from the surface of the engine where the old fuel pump was located. This surface must be clean to ensure that the new gasket will seal properly. The surface can be cleaned with either a gasket scraper or with the blade of a flathead screwdriver.
Coat one side of the new fuel pump gasket with gasket sealer. Place the coated side of the gasket against the fuel pump. Coat the opposite side of the gasket with gasket sealer.
Insert the metal arm which exits the back of the fuel pump into the side of the engine until the fuel pump rests evenly against the engine.
Insert both of the pump's retaining bolts through the pump and into the engine. Tighten each bolt with a wrench.
Insert the tip of the fuel line which bolts to the pump into the pump. Tighten the line with a wrench.
Slide the remaining fuel line over the metal nipple on the fuel pump. Tighten the hose clamp with a flathead screwdriver.
