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Home >> Cadillac >> 1977 >> Seville >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> 260" OLDSMOBILE, 350" CADILLAC 350"(VIN Code R) & 403" BUICK, OLDSMOBILE & PONTIAC >> Camshaft >> Valve Timing

Valve Timing

  1. Remove distributor cap, right valve cover, No. 4 cylinder intake and exhaust rocker arms and pivot. Remove wire from "BAT" terminal of distributor. Turn ignition switch on and crank engine until rotor is in line with No. 4 spark plug wire position (No. 4 piston at top of cylinder).
  2. Measure from pivot boss on head surface to top of No. 4 intake push rod and record measurement. Crank engine until rotor approaches No. 1 spark plug wire position. Continue to turn engine until timing mark on crankshaft pulley is at TDC. Measure from pivot boss surface to top of No. 4 intake push rod. Measurement should increase over first recorded measurement by 1/8" 1/32".
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