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Start-up noise

Car Start noise cold or warm, what can it possibly be?

Hi Scotty, when I start the car cold or warm, withing about 5 mins or so my 2009 Cadillac CTS 3.6l makes this awful noise sounds like dry cams or something, any idea what it could possibly be? Any help is greatly appreciated Thanks!

get rid of that baby, rods are a knocking. Engine will soon be toast. Or put another engine in

oh, It is only on start-up and has no knock sound when accelerating or after 5secs of running, its only on start-up.. could it be a timing tensionor

thanks for reply