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Home >> Buick >> 1968 >> Wildcat Base, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Tune-Up >> Exhaust Emission Systems - Tune-Up >> Service Procedures

Service Procedures

In addition to servicing an individual emission system or component, all ignition system and/or carburetor adjustments necessary must also be correctly performed.

NOTE: Due to late changes and corrections, always refer to Engine Tune-Up decal in engine compartment before beginning Tune-Up. In event of any conflict between decal specifications and given specifications, decal specifications should prevail.
Fig 1: BUICK 250" 6 CYLINDER (1968-69)
G09352818Courtesy of GENERAL MOTORS COMPANY
Fig 2: BUICK 250" 6 CYLINDER (1971 & 1974)
G09352819Courtesy of GENERAL MOTORS COMPANY
Fig 3: BUICK 225" V6 (1966-67)
G09352820Courtesy of GENERAL MOTORS COMPANY
NOTE: To by-pass Starter Interlock, turn ignition "ON" and locate by-pass relay switch in engine compartment. Press and release button on relay. Engine can now be cranked or started. If ignition is turned to "OFF" or "LOCK" position, reactivation of relay button will again be required before engine can be cranked or started.