When oil is cold it is thicker and stays [on]coats metal as oil warms up it thins out and flows better[makes it thinner will hear ticking] sounds like a bad lifter or even camshaft lobe problem ,could also have a problem with a loose or out of adjustment rocker arm
SOURCE: Rapping/ticking sound in my 2001 Chevy tracker engine.
does it go tick tick tick tick and when it warms up it stops or goes quiet?
its your lifters not getting enough oil
when u change your oil it will stop till that oil gets worn out
you will have to replace the lifters or it can also be a slack oil pump not pumping oil around the engine like it should
SOURCE: Noisy rattle in engine compartment of 2003 Impala on cold start.
Take a broom handle(with the broom removed) or long heavy dowel rod , start the engine when cold and place one end of handle to your ear and the other to different parts non-moving parts of the engine compartment,including the engine to narrow down the location of the noise.
SOURCE: Lifter ticking when I start my 1999 Chevy Tahoe
Your lifters have become clogged over the years. Its only after the oil warms up and thins out does it allow oil to "pump up" the lifters. That's why it goes quiet after 5 min. There are several different brands of additives on the market that can fix this problem ,unless you have a more serious mechanical problem, which I doubt.Check your local auto parts store for the additive. Just add it to your oil and "wham!" problem solved. Good Luck!
SOURCE: how to solve engine lifter tick noise
Get the heads worked on or replaced it might need a valve lashment.
SOURCE: MY 2002 chevy tahoe has a loud ticking noise when
Check for an exhaust leak at the exhaust manifolds and flanges.
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