1990 Chevrolet 3500 Pickup Q&A

1990 Chevrolet 3500 Pickup Question: 1989 7.4 stalled while driving

all cylinders lost compression. replaced worn-out timing chain and gears. still 0 compression in all cylinders. whats the likliness of all the valves getting bent and staying open. seems there should be some compression in any givin cylinder even if the timing was off. the crank gear is set at 12 o clock the cam gear at 6 o clock..... baffled -
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