Chevrolet Full-size Cars 1968-1978 Repair Guide

Gasoline Fuel Filter


There are three types of fuel filters; internal (in the carburetor fitting), inline (in the fuel line) and in-tank (the sock on the fuel pickup tube).

Before removing any component of the fuel system, refer to the Fuel Pressure Release procedures in this information and release the fuel pressure.


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Fig. Fig. 1 The fuel filter is located behind the large fuel line inlet nut on the carburetor

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Fig. Fig. 2 Remove the retaining nut and the filter will pop out under spring pressure

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Fig. Fig. 3 Install the new filter and spring as shown-some early model vehicles used a bronze filter element but most were made of paper

The carburetor inlet fuel filter should be replaced every 12,000 miles (15,000 miles for 1975-78 cars) or more often if necessary.

  1. Disconnect the negative battery cable. Disconnect the fuel line connection at the fuel inlet filter nut on the carburetor.
  3. Remove the fuel inlet filter from the carburetor.
  5. Remove the filter and the spring.

If a check valve is not present with the filter, one must be installed when the filter is replaced.

  1. Install the spring, filter and check valve (must face the fuel line), then reverse the removal procedures.
  3. Start the engine and check for leaks.


Carbureted Engine

To release the fuel pressure on the carbureted system, remove and replace the fuel tank cap.