1967 Models: Checker: Notes

CHANGES, CAUTIONS, CORRECTIONS 

• "A.I.R." CARBURETOR NOTE:  These carburetors used on engines with Air Injection Reactor exhaust emission control and are special units with different jet calibrations and specifications.
• 1959 BUICK CUTTING OUT ON TURNS CORRECTION AND FLOAT ADJUSTMENT CAUTION (Rochester 4GC 7013044 Carb.):  Carburetors have been modified in the field to correct this complaint and these carburetors require special primary float setting as follows:
  1. Carburetors marked "A", "B", or no number on Identification Tag -  "Vacuum Assist" feature of primary floats was eliminated by breaking off forked tang on float hanger and primary balance spring was added. Set these floats to "No Vacuum Assist" specifications (unmodified carburetors should be set to "Vacuum Assist" specification).
  2. Carburetors marked "C" or later on Identification Tag -  "Vacuum Assist" was removed from primary floats by removing cup and spring from vacuum piston stem (forked tang on float hanger was not disturbed). Set these floats to "No Vacuum Assist" specification.
• 1961-63 BUICK SPECIAL HESITATION ON ACCELERATION CORRECTION:  If accelerating pump system operating correctly, make certain pump stroke setting correct for average daytime temperatures as follows: Below 0°F - Inner Hole, 0° to 60°F - Center Hole, Above 60°F - Outer Hole.
  CAUTION: Pump stroke setting must be checked with pump rod in center hole of pump arm. Reset pump rod as above after checking completed.
• 1961-62 BUICK SPECIAL & 1962 PONTIAC TEMPEST V8 4-BBL. CARBURETOR VENTURI CLUSTER GASKET REPLACEMENT CAUTION:  When replacing the venturi cluster gasket on Carburetors No. 7020043, 7020045, and 7020078 make sure gasket is Part No. 7007803. (See Fig 1). DO NOT USE Gasket No. 7021637 on these carburetors.
  Fig 1: VENTURI CLUSTER GASKET

  Courtesy of GENERAL MOTORS COMPANY
  NOTE: Both of these gaskets are included in some "Overhaul", "OK Kits" and "Gasket Kits".
• 1963 BUICK SPECIAL HESITATION DURING WARM-UP CORRECTION (CARBURETORS BEFORE "B" STAMPED ON CODE TAG):  Install Flat Spot package, Part No. 7026678.
  CAUTION: Ignore instructions found in package.