Caprice Wagon RWD V8-305 5.0L (1991)
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Crank the engine until the mark on the torsional damper lines up with center or "0" mark on the timing tab fastened to the crankcase front cover,
and the engine is in the number 1 firing position.
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Place your fingers on the number 1 valves as the mark on the damper comes near the "0" mark. If the valves move as the mark comes up to the
timing tab, the engine is in the number 6 firing position and should be turned over one more time to reach the number 1 position.
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With the engine in the number 1 firing position, the following valves may be adjusted:
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Exhaust: 1, 3, 4, 8.
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Intake: 1, 2, 5, 7.
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Back out adjusting nut (35) until lash is felt at the pushrod (41). Then tighten adjusting nut (35) just until all lash is removed.
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Lash removal can be determined by rotating the pushrod (41) while turning the adjusting nut (35).
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When all play has been removed, turn adjusting nut (35) in: 1 and 1/4 additional turns.
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Crank the engine one revolution until the pointer "0" mark and torsional damper mark are again in alignment. This is the number 6 firing position.
With the engine in this position, adjust the following valves as outlined below:
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Exhaust: 2, 5, 6, 7.
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Intake: 3, 4, 6, 8.
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Install valve rocker cover.
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Check minimum idle speed.
