'04 gt already knocking?

lptheory96

Founding Member
Aug 10, 2002
386
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Birmingham, Alabama
I have an 04 40th ann. gt, about 40k on it, I may have been a little latye on a few oil changes but when I first crank the veh. It knocks for like 1.2seconds then stops, I think its the rods knocking but it only does it when I first crank it, im wondering if im not just hearing something else, any idea what could cause this so early? thanks.
 
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