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Discussion Starter · #1 ·
My uncle and I are working on rebuilding the 454 motor out of his 99 GMC 1-ton dually. We are stuck because we can't figure out how to time the timing chain. We replaced the chain, and 2 sprockets. Now, we don't know where the dots line up to time it right. We have heard and seen 12 oclock and 12 oclock, 12 oclock and 6 oclock. We very much want to get it right on the first go. Anyone know where the dots should line up at? Thanks.
 

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Discussion Starter · #3 ·
ok. In othe Haynes manual he has, it says something to the effect that turning the cam to the 6 oclock position should have the crank in the 12 oclock position. I'm guessing the cam to crank gear ratio is 2:1 or something for that to occur? The information in the haynes was VERY confusing and seemed to contradict itself on how to time the blasted thing. Thanks TraiLeadr, as always, you bailed my *ss out of the fire. :great:
 

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Discussion Starter · #4 ·
Are you sure that the motor hasn't changed from 93 to 99? Pretty much everyone my uncle has spoke to has said that it goes at 6 and 12. I do trust you, but I want to double-check they haven't changed the designs since 93.
 
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