GM Corvette 1963-1982 Repair Guide

All Carburetors

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THROTTLE LINKAGE/CABLE ADJUSTMENT



Four-Barrel Carburetors
1963-67 VEHICLES

Adjust the length of the throttle linkage to ensure full opening of the throttle plates. Turn the threaded swivel at the throttle so that with the accelerator pedal fully depressed and the carburetor throttle valve fully open, the threaded swivel will freely enter into the throttle lever. The lever should then be turned two full turns to lengthen the control rod.

1968-72 VEHICLES

Loosen the accelerator cable clamp bolt at the carburetor bracket. Block the accelerator pedal in the fully depressed position. Open the carburetor throttle fully and tighten the cable clamp bolt to 45 inch lbs.

1973-82 VEHICLES (INCLUDING TBI)

Throttle cable adjustments are not possible on these models.

Three, Two-Barrel Carburetors

1967-69 VEHICLES

Loosen the cable clamp, then fully depress the accelerator pedal and fully open the throttle plate of the primary carburetor. Tighten the cable clamp bolt to 45 inch lbs.

Bring the engine to operating temperature, set the idle to specifications, and turn it off. Bottom the clevis pin in the throttle slot of the primary carburetor and adjust the secondary closing rod of the rear carburetor so that it lacks 1 / 2 a rod diameter of being long enough to freely enter the rear secondary throttle hole. Connect the rod. Adjust the forward secondary rod so that it barely enters the throttle lever hole. Connect the rod and check the linkage operation to be sure the plates close completely.

REMOVAL & INSTALLATION



See Figures 1 through 11

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Fig. Fig. 1: Unfasten the retaining clips to disconnect the air cleaner ducts ...



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Fig. Fig. 2: ... then remove the air cleaner assembly



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Fig. Fig. 3: View of the carburetor after the air cleaner assembly has been removed



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Fig. Fig. 4: Make sure to tag the vacuum lines before you disconnect them, to avoid confusion during installation



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Fig. Fig. 5: Use a suitable back-up wrench when disconnecting the fuel lines from the carburetor



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Fig. Fig. 6: Remove any clips or other retaininers ...



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Fig. Fig. 7: ... then disconnect the linkage from the carburetor



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Fig. Fig. 8: Unfasten the retaining bolts using a suitable size wrench ...



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Fig. Fig. 9: ... then remove the carburetor from the vehicle by lifting it off the intake manifold



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Fig. Fig. 10: Remove the carburetor gasket. Discard the gasket and replace with a new one during installation



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Fig. Fig. 11: Protect the intake manifold openings from debris, then remove the gasket

  1. Disconnect the negative battery cable.
  2.  
  3. Unfasten the air cleaner ducts, then remove the air cleaner assembly.
  4.  
  5. Tag and disconnect the vacuum lines from the carburetor.
  6.  
  7. Disconnect the choke coil rod, heated air line tube and the electrical connector, if necessary.
  8.  
  9. Using a suitable back-up wrench, disconnect the fuel lines from the carburetor.
  10.  
  11. Disconnect the throttle linkage from the carburetor.
  12.  
  13. If equipped with an automatic transmission, disconnect the throttle valve linkage, if equipped.
  14.  
  15. If CEC equipped, remove the CEC valve vacuum hose and electrical connector. Disconnect the EGR line, if equipped.
  16.  
  17. Remove the idle stop solenoid, if equipped.
  18.  
  19. Unfasten the retaining bolts, then remove the carburetor from the vehicle by lifting it off the intake manifold.
  20.  
  21. Remove the carburetor gasket and/or insulator as necessary. If equipped, discard the gasket and replace with a new one during installation.
  22.  

To install:

Place clean towels or rags in the intake openings to avoid getting any foreign material, or other debris in the manifold.

  1. Place a new gasket and/or insulator, as applicable, on the intake manifold.
  2.  
  3. Installation is the reverse of the removal procedure. Make sure to fill the float bowl with gasoline to ease starting the engine.
  4.  
  5. Connect the negative battery cable.
  6.  

 
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